All Tools
Every free, working ToolHuts tool, grouped by category.
Choose what you need to measure
A broad request needs a shape or task. Choose a tool below, or search by name.
Spacing and layout
Size and dimensions
Numbers and conversions
Pitch: choose the meaning
Choose a printable tool
Use a drill grid for rows of holes, a bolt circle for holes around a center, or Print to Scale for an existing image. Enter measured dimensions, then print at 100% and check the calibration mark before transferring the layout.
Personal measurement tools
Bra measurement and size-chart calculator
Use named Wacoal measurement ranges or convert existing Freya labels across UK, US, EU and French systems.
Dress measurement and editable size-chart guide
Compare bust, waist and hip measurements with a named regular-fit chart or your entered brand table.
Measured belt size and hole positions
Convert a measured wearing length into belt size and leather-fold hole positions with explicit buckle allowance.
Adult BMI reference
Calculate adult BMI from measured height and weight, with CDC categories and explicit population limits.
Adult body surface area estimate
Estimate adult body surface area with the Mosteller formula. Educational geometry only; no medication dosing.
Resting energy and maintenance estimate
Calculate Mifflin resting energy and a maintenance scenario using an explicitly entered activity multiplier.
Last-period due-date estimate
Estimate a due date from a known last menstrual period and regular 28-day cycle using the 280-day convention.
Mid-parental adult-height reference
Calculate the AAP mid-parental height reference and broad target interval from both biological parents’ measured heights.
Alcohol dose and peak-model scenarios
Calculate ethanol dose and two illustrative Widmark peak scenarios. No present-BAC measurement or driving clearance.
Love test
Compare four lighthearted preferences with a partner. A private conversation quiz with transparent answer counts, not a compatibility prediction.
Finance calculators
Compound interest and CD calculator
Project savings using nominal rates or APY, monthly deposits and an explicit compounding convention.
Loan and vehicle payment calculator
Calculate fixed monthly payments and an amortization schedule, including vehicle trade-in and extra payments.
Tip and bill split calculator
Calculate tips before or after tax and split the total exactly to the cent.
Home purchase budget worksheet
Explore a purchase-price scenario from entered debt caps, ownership costs, rate and down payment.
Inflation and present value calculator
Adjust an amount using entered price indices or a constant annual growth or discount rate.
Currency conversion with an entered rate
Convert currencies using your dated quote and explicit percentage and fixed fees.
Budget at completion and earned value
Sum the approved baseline and compare cost, schedule and remaining-work forecasts with explicit assumptions.
2025–2026 owner IRA RMD estimate
Estimate 2025–2026 owner IRA minimum distributions using IRS Tables II/III, prior-year balance and applicable ages.
Electrical calculators
Watts, amps and volts calculator
Solve real power, voltage or current for DC, single-phase AC and balanced three-phase systems.
Series and parallel resistance calculator
Calculate equivalent resistance for up to 200 resistors, including ideal short circuits.
Electric field, force and potential calculator
Calculate signed point-charge field, force, potential and energy, or a uniform field from voltage drop.
Wire sizing guide and DC worksheet
Compare copper DC voltage drop with a chosen limit and independently check supplied corrected ampacity.
Science calculators
Motion calculator
Calculate displacement, path length, velocity, acceleration and kinetic energy.
Speed distance time calculator
Solve speed, distance or time with explicit length, speed and duration units.
Angular motion calculator
Calculate angular acceleration, rotation and tangential motion from radian or RPM inputs.
Projectile and free fall calculator
Calculate ideal flight time, range, height and impact speed with a trajectory diagram.
Distance calculator
Measure straight-line coordinate distance or approximate great-circle distance from latitude and longitude.
Work and force calculator
Solve Newton law, sum planar force vectors and calculate work at an angle.
Friction calculator
Distinguish actual static friction, maximum static friction and kinetic friction, or solve a coefficient.
Tension calculator
Calculate tension for one vertical rope, two supporting ropes or an ideal two-mass pulley.
Gravity and escape velocity calculator
Calculate inverse-square gravity, attraction force and escape speed from mass and centre distance.
Rotational moment of inertia calculator
Calculate mass inertia for defined shapes and axes, including valid parallel-axis offsets.
Momentum calculator
Solve signed one-dimensional momentum, mass or velocity.
Kinetic energy calculator
Solve energy, mass or speed, compare energy units and estimate average stopping force from distance.
Spring energy calculator
Calculate spring energy, signed restoring force and inverse stiffness or displacement.
Density, mass and volume calculator
Solve density, mass or volume with explicit metric and imperial units.
Water and dry air properties
Calculate tabulated water density, specific gravity, mass and weight, or dry ideal-air density.
Dynamic and kinematic viscosity converter
Convert dynamic and kinematic viscosity using fluid density, including cP and cSt.
Drag, lift and terminal velocity calculator
Calculate drag, lift or signed terminal velocity with explicit area, coefficient and buoyancy.
Pipe flow rate calculator
Calculate full circular-pipe volume flow, mean speed and mass flow.
Reynolds number calculator
Calculate Reynolds number with pipe-only regime interpretation and explicit fluid properties.
Mach and speed of sound calculator
Convert Mach and airspeed at an explicit temperature, including mph, km/h, ft/s and knots.
Density and pressure altitude calculator
Calculate pressure altitude, moist-air density altitude or standard tropospheric pressure with explicit station-pressure inputs.
Dew point, wet bulb, heat index and wind chill
Estimate dew point, sea-level wet bulb and NWS heat index or wind chill within stated model limits.
Wave frequency and wavelength calculator
Convert frequency, wavelength, speed, period and angular frequency with explicit units.
Photon energy calculator
Convert vacuum wavelength, frequency and photon energy using exact SI constants.
Doppler shift calculator
Calculate acoustic or longitudinal relativistic Doppler shifts with explicit velocity signs.
Thin lens calculator
Calculate real or virtual image position, magnification and signed image height.
Heat capacity calculator
Solve heat, mass, specific heat or temperature change with Q = mcΔT.
Ideal gas law calculator
Solve PV = nRT and compare compatible units of the universal gas constant.
Moles, atoms and electrons calculator
Convert mass, moles and particle counts or calculate isotope proton, neutron and electron counts.
Theoretical and percent yield calculator
Calculate limiting reactant, theoretical product and percentage yield from balanced coefficients.
Half-life calculator
Solve remaining amount, elapsed time or half-life for exponential decay.
Freezing point depression calculator
Estimate dilute-solution freezing point from molality, solvent constant and entered van’t Hoff factor.
Water boiling point calculator
Calculate pure-water saturation temperature from absolute pressure using the IAPWS correlation.
Bond angle calculator and geometry guide
Calculate an angle from bond vectors and compare ideal electron-domain geometries.
Date and time tools
Date duration calculator
Count calendar days, weekdays and weekends, or add and subtract days.
Duration calculator
Normalize hours, minutes and seconds and subtract another duration.
Work hours calculator
Calculate shift hours after unpaid breaks, including overnight shifts.
Age calculator
Calculate calendar age on an explicit date in years, months and days.
Time unit converter
Convert seconds, minutes, hours and explicitly defined average months and years.
Time zone converter
Convert dated local times between IANA zones with explicit daylight-saving ambiguity handling.
Current time
Compare live device time across named city time zones and local dates.
Printable calendar
Create a dated monthly or weekly calendar, or a blank grid, with localized weekday labels and PDF/SVG export.
Clock face template
Print a blank or numbered clock face with optional hands, and view a live analogue clock with seconds.
Sundial reading guide and clock-time converter
Read a correctly installed sundial and estimate civil time using date, longitude and UTC offset.
Dog age comparison by size
Compare whole dog ages with a published size-specific human-age reference table.
Math utilities
Random number generator
Generate bounded random integers with optional unique results using browser crypto.
Dice roller
Roll multiple dice with editable sides, individual results and a total.
Test grade calculator
Calculate a percentage and letter grade with editable thresholds and extra-credit rules.
GPA calculator
Calculate credit-weighted GPA from numeric course points on your chosen scale.
Fraction calculator
Convert decimals and mixed numbers to exact fractions and perform fraction arithmetic.
Factor calculator
Find prime factors, positive divisors, greatest common divisor and exact least common multiple.
Logarithm calculator
Calculate a real logarithm with an explicit positive base and argument.
Power and root calculator
Square numbers, raise powers and compute real nth roots with domain validation.
Percentage calculator
Calculate percent of a value, reverse percentages, change, difference and percentage tables.
Ratio and golden ratio calculator
Simplify and scale ratios or calculate golden-ratio segments and rectangle sides.
Probability and combinations calculator
Calculate equally likely probabilities, exact combinations and binomial event probability.
Roman numeral converter
Convert integers from 1 to 3999 to canonical Roman numerals and back.
Standard deviation calculator
Calculate sample or population standard deviation, variance, mean and median.
Sequence calculator
Test arithmetic or geometric sequences and calculate an nth term from supplied values.
Quadratic and completing-square calculator
Find real or complex roots, vertex, discriminant and completed-square form with a graph.
Linear equation grapher
Graph Ax+By=C, including vertical lines, with slope, intercepts and coordinate table.
Tape diagram equation builder
Build an equal-group tape diagram for nx+b=t and show the subtraction and division steps.
Scientific calculator
Evaluate arithmetic, powers, factorials, logarithms and trigonometry with explicit angle mode.
Image arithmetic calculator
Read a printed expression locally, review the recognized text and explicitly confirm arithmetic calculation.
Unit converters
Length converter
Convert length units including millimetres, inches, feet and miles.
Area converter
Convert square units, hectares and acres using squared length factors.
Volume converter
Convert litres, cubic units and explicitly labelled US or UK gallons.
Mass converter
Convert metric mass, pounds, ounces and stones with defined unit factors.
Speed converter
Convert speed between metres per second, kilometres per hour, mph and knots.
Angle converter
Convert degrees, radians, turns and gradians, with signed DMS input and output.
Torque converter
Convert torque between newton metres, pound-force feet and related units.
Energy converter
Convert joules, watt-hours and thermochemical calories with visible equivalences.
Linear inches calculator
Add length, width and height to calculate combined dimensions in inches and centimetres.
Geometry
Cylinder Volume
Calculate cylinder volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Cone Volume
Calculate cone volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Sphere Volume
Calculate sphere volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Pyramid Volume
Calculate pyramid volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Rectangular prism Volume
Calculate rectangular prism volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Solid Volume
Calculate solid volume or solve a missing dimension, with diagrams and metric/imperial outputs.
Tank Volume
Calculate full capacity and partial fill for horizontal or vertical cylinders and rectangular tanks.
Rectangle
Solve rectangle dimensions and diagonal, with area, perimeter and a practical layout squaring example.
Slope
Calculate signed rise/run, gradient, directed angle and a point-slope equation with a displacement graph.
Rectangle Area
Calculate rectangle area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Circle Area
Calculate circle area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Ellipse Area
Calculate ellipse area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Trapezoid Area
Calculate trapezoid area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Kite Area
Calculate kite area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Regular Polygon Area
Calculate regular polygon area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Room Area
Calculate room area from measured dimensions, with unit conversions, a schematic diagram and a worked example.
Triangle
Solve triangle sides, angles and area from known measurements. Includes a labelled diagram, unit conversions and explicit handling of ambiguous solutions.
Right triangle
Solve triangle sides, angles and area from known measurements. Includes a labelled diagram, unit conversions and explicit handling of ambiguous solutions.
Circle, arc and chord calculator
Solve radius, circumference, arc, chord, sagitta, sector and circle-equation centre.
Curve length calculator
Measure polylines or integrate quadratic and cubic Bezier curve length from coordinates.
Angle calculator
Find angles between rays, a missing triangle angle or regular-polygon angles.
Four-square court layout
Plan court sides, quadrants, marking width and entered clearance for a four-square ball-game court.
Leathercraft
Belt Hole Layout
Lay out evenly spaced belt or strap holes around a measured centre hole and print a full-size guide.
Buckle Fold Template
Mark a measured buckle fold and tongue slot on a full-size strap pattern.
Bag Gusset
Find rounded-panel stitch perimeter, corner transitions and gusset cut length.
Stitch Hole Spacing
Fit a whole number of stitch intervals to a measured seam and print exact hole positions.
Corner Stitch Spacing
Distribute stitch holes through straight runs and a rounded corner.
Rivet Spacing
Space rivets or studs between measured end margins and print a punch guide.
Corner Radius Template
Generate a full-size quarter-circle gauge for a measured leather corner radius.
Fabric Crafts
Quilt Backing
Compare vertical and horizontal backing-panel layouts, yardage or metres, seams and waste from your quilt and usable fabric width.
Quilt Binding
Calculate perimeter, WOF strip count and fabric to buy from your quilt size, cut-strip width and joining allowance.
HST Calculator
Find exact source-square counts, trim-friendly cutting size and batch instructions for two-, four- or eight-at-a-time HSTs.
Circle Skirt Pattern
Draft full-, half- or quarter-circle skirt geometry with explicit waist and hem allowances, then download a calibrated tiled pattern.
Model Railroad
Grade Calculator
Find the grade, vertical easements and riser heights for a climb, or the run needed for a target grade.
Helix Calculator
Work out helix grade, turns, track length and footprint, and print a full-size deck segment template.
Easement Template
Print a full-size spiral easement and curve template for model railroad track, with the exact offset from the tangent.
Curve Template
Print a full-size circular curve template for one or two tracks, with chord, sagitta and radial tick marks.
Curve Clearance
Find how far cars swing in and out on a curve and the minimum spacing between parallel tracks.
Scale Speed
Convert a timed run over a measured distance into scale mph and km/h, or find the time for a target speed.
Train Length
Scale a train's prototype length to the model, check it against your siding and find how many cars fit.
Home Theater & AV
UPS Runtime
Estimate runtime from total battery-pack capacity and measured rack load, while checking both UPS watt and VA ratings.
Seating Sightlines
Estimate the row heights needed for each sightline to clear an assumed head height in the row ahead.
Outdoor Cinema Screen
Compare near and far audience viewing angles with screen dimensions, size bounds and ideal dark-screen brightness.
Golf Sim Screen
Fit an aspect-correct impact-screen image inside clear room dimensions and calculate the projector lens throw range.
Anamorphic Screen
Plan constant-image-height scope geometry, same-height 16:9 size, side masks and anamorphic stretch.
TV vs Projector
Compare how image size, ambient light, daily use, budget and installation affect the choice without assigning an artificial winner.
Ultrawide Equivalent
Compare an ultrawide with 16:9 screens at the same physical height or width and with a bezel-free dual-screen split.
Monitor Distance
Combine a maximum horizontal field of view with minimum pixels per degree to find a practical desk distance.
PPD / PPI
Calculate screen or monitor pixels per degree at your viewing distance, then compare angular PPD with physical PPI and pixel pitch.
Speaker Cable Gauge
Compare copper AWG loop resistance and signal loss, then select the thinnest gauge within a chosen limit.
Amplifier Power / SPL
Estimate listening-position SPL and reverse-calculate watts per speaker for a target plus headroom.
Panel Area
Compare panel face area and estimated absorption with room surface area using an explicitly entered reference target.
Reflection Points
Locate symmetric side-wall first reflection points with the mirror-source method and real room coordinates.
Atmos Layout
Calculate two- or four-speaker overhead coordinates from ceiling height, ear height and elevation angle.
Surround Speaker Angles
Plot symmetric 5.1 or 7.1 speaker positions from reference listening angles and an editable radius.
Subwoofer Placement
Plot practical boundary, centre and quarter-room subwoofer test positions around the listening seat.
Speaker Placement
Lay out a centred stereo triangle from room dimensions, speaker offset and listening position.
RT60 Calculator
Estimate Sabine reverberation time and the total absorption needed for an editable decay target.
Room Mode Calculator
Enumerate axial, tangential and oblique room resonances and inspect close low-frequency clusters.
Screen Gain
Calculate the screen gain or delivered lumens needed for a brightness target, then compare common gain values.
Projector Brightness
Estimate foot-lamberts from delivered lumens, screen size and gain, or reverse-calculate required output.
Projector Screen Size
Find the largest image that fits your lens distance, throw ratio and usable wall height.
Projector Throw Distance
Calculate lens-to-screen distance, throw ratio or screen diagonal with a scaled optical diagram.
TV Size Comparison
Compare two TV sizes by physical dimensions, visible area and viewing angle from the same seat.
4K/8K Distance
Compare 1080p, 4K and 8K angular pixel density at your actual screen size and seat.
TV Mount Height
Calculate screen centre, top, bottom and VESA reference height from your actual seated sight line.
TV Dimensions
Convert advertised diagonal and aspect ratio into visible width, height, area and estimated bezel size.
Aspect Ratio
Simplify a width-to-height ratio and calculate matching dimensions without stretching.
TV Viewing Distance
Compare your current seat position with editable viewing-angle distances for any TV size.
TV Size Calculator
Find a TV diagonal from viewing distance and angle, then compare three screen sizes in a to-scale room view.
Passive Crossover Calculator
Calculate starter inductor and capacitor values for a first- or second-order passive speaker crossover.
Port Velocity Calculator
Estimate peak port air speed and Mach number from cone area, excursion, frequency and port dimensions.
Speaker Box Calculator
Calculate gross and net internal enclosure volume, a six-panel cut list and an estimated port length.
Impedance & L-Pad Calculator
Calculate the equivalent nominal impedance of series, parallel or series-parallel drivers and size an L-pad attenuator.
Subwoofer Port Calculator
Calculate port tuning from a known port length, or solve the port length for a target tuning frequency.
Bandpass Enclosure Planner
Plan sealed rear and vented front chamber volumes for a fourth-order single-reflex bandpass enclosure.
Driver Displacement Calculator
Estimate the internal enclosure volume displaced by a driver's basket and motor assembly.
Automotive
Engine displacement calculator
Calculate swept engine volume from bore, stroke and cylinder count in litres, cubic centimetres and cubic inches.
Power-to-weight calculator
Compare power per tonne or mass per horsepower with explicit kW, mechanical hp and metric PS units.
Bicycle and BMX gearing calculator
Compare chainrings and sprockets using measured tyre rollout, cadence, gear inches and gain ratio.
Wheel Offset Calculator
Compare a current and proposed wheel/tyre setup and see exactly how the geometry changes.
Tire Size Calculator
Compare two tyre sizes side by side - diameter, sidewall, circumference and speedometer effect.
Alternative Tire Sizes
Find standard tire sizes, including different wheel diameters, that keep overall diameter within a chosen tolerance of a starting size.
Wheel Spacer Calculator
See how a wheel spacer changes your effective offset and how far the wheel moves outward.
Scrub Radius Calculator
See how much a wheel offset or spacer change shifts your scrub radius from a known baseline.
Gear & RPM Planner
Compare road speed and engine RPM across six transmission gears using tire diameter and axle (final-drive) ratio.
Speed / RPM Converter
Convert road speed to engine or driveshaft RPM, or RPM to road speed, from tire diameter and one gear ratio.
Print & Scale
Print to Scale
Upload an image, set one measured dimension, and prepare a full-size tiled PDF with a calibration check.
Paper Size & Scale
Find the scale percentage to enlarge or reduce a document between standard paper sizes, with the full A0-A6 reference chart.
Bleed & Crop Marks
Generate a printable bleed, safe-area and crop-mark reference sheet for a trim size.
Model Scale Converter
Convert dimensions between real-world size and model scales, and get a 3D-print slicer resize percentage.
Image DPI Checker
Inspect an image locally and see its print size, effective PPI and paper-size fit.
Fret Slot Template
Generate a full-size, printable fret slot layout for twelve-tone equal temperament from scale length and fret count.
Tonearm Protractor
Generate a printable pivot-specific tonearm alignment protractor for Lofgren A/Baerwald, Lofgren B or Stevenson geometry.
Workshop
Graph Paper
Create calibrated square or dot-grid paper, draw on it locally, and export a single-sheet PDF or SVG image.
Calibrated screen ruler
Measure screen-plane lengths after physical calibration, with millimetre or sixteenth-inch ticks and zoom/resize invalidation.
How to read a ruler
Select ruler ticks and see reduced inch fractions, decimal inches and millimetres in an interactive reading guide.
Gear ratio and RPM calculator
Calculate driver/driven ratios, speed, torque and theoretical wheel speed with a phase diagram and chart.
Circle and oval template
Generate repeated circles or ellipses at physical dimensions with centre marks and tiled PDF/SVG export.
Bubble level with manual and sensor modes
Check two-axis relative tilt with opt-in device sensors, zero calibration and a manual angle fallback.
Pipe Notch Template
Generate a full-size fishmouth or saddle template for the theoretical intersection between two tubes.
Bolt Circle Template
Enter a bolt circle diameter and hole count to generate a full-size printable template with a calibration check.
Drill Hole Template
Lay out custom rows of drill holes with exact spacing and download a printable template.
Printable Ruler
Prepare a full-size metric, imperial or combination ruler and verify the printed calibration square before use.
Printable Protractor
Prepare a full-size 180° protractor and verify its printed calibration mark before use.
Drill Point Calculator
Find a drill's tip length and how deep to drill for a target full-diameter blind-hole depth.
Countersink Calculator
Solve countersink depth, major diameter, pilot diameter or included angle with a live section view.
Sine Bar Stack Calculator
Calculate sine-bar height and find a short metric gauge-block combination near the target.
Fabrication
Bend Allowance Calculator
Calculate sheet-metal bend allowance, deduction and setback, or find K-factor from a measured test bend.
Cone Flat Pattern
Generate the flat (developed) pattern for a truncated cone from its top/bottom diameters and height.
Square to Round
Develop the flat-pattern panels for a square or rectangle-to-round duct or pipe transition by triangulation.
Reducer Layout
Develop the flat-pattern template for a pipe reducer, concentric or eccentric, including the fully flush case.
Flat-Oval to Round
Develop the flat-pattern template for a centered transition between flat-oval and round duct.
Box & Pan Pattern
Develop the one-piece flat-pattern blank for a four-flange sheet metal box, pan or tray, with corner relief.
Segmented Elbow
Lay out a gored/lobster-back elbow's miter angles and per-piece flat pattern from diameter, bend radius, angle and piece count.
Duct Rolled Offset
Calculate rolled-offset travel, advance and roll angle, with a printable mitered-elbow cut template.
Chain & Sprocket Calculator
Calculate roller-chain pitch length, adjusted center distance and sprocket speed ratio from tooth counts.
Metal Weight Calculator
Calculate the weight of plate, round bar, square bar, tube or angle stock from cross-section, density and cut list.
Surface Speed Calculator
Solve spindle RPM and feed rate from target cutting speed for turning or milling operations.
Tap Drill Calculator
Calculate the theoretical tap drill diameter for a metric or unified thread at a target percent of thread engagement.
V-Belt Length Calculator
Calculate V-belt pitch length from pulley diameters and center distance, or solve center distance from a selected belt length.
Screw Flight Pattern
Develop an annular-sector workshop blank for one screw-flight turn from outside diameter, shaft diameter and pitch.
Pipe Fitting Takeoff
Deduct user-supplied fitting center-to-end dimensions from field measurements to find a pipe cut length.
Offset Branch Template
Generate a full-wrap branch-pipe intersection profile with a signed axis offset and branch angle.
Pipe Offset Clocking
Convert vertical and lateral offsets into near/far-end clock positions and circumference marks from an established datum.
Offset Multiplier
Calculate travel and run for a same-plane pipe offset from the offset distance and fitting angle, with the standard multiplier chart.
Truncated Pyramid Pattern
Develop the four true-size trapezoid panels for a centered rectangular truncated pyramid.
Hopper Flat Pattern
Develop four printable trapezoid panels for a centered rectangular hopper inlet and outlet.
Oblique Cone Pattern
Triangulate an offset-apex circular cone into a printable developed blank with true generator lengths.
Duct Seam Allowance
Estimate rectangular or round duct blank girth with a shop-specified seam allowance, in millimetres or inches, plus strips per stock width.
Woodworking
Square feet and linear feet calculator
Convert area and linear footage using actual coverage width, with both directions supported.
Log board-foot estimator
Estimate log yield with named Doyle or International quarter-inch rules and explicit rounding.
Plywood Cut Calculator
Nest an arbitrary parts list onto sheets to minimize waste, with a visual cutting layout you can print.
Linear Cut List Optimizer
Optimize cutting a list of lengths from stock bars/boards, minimizing offcuts and stock used.
Board Foot Calculator
Calculate board feet and total cost for dimensional lumber.
Miter Angle Calculator
Find the miter saw angle for a regular-shape frame or a custom corner angle.
Drawer Box Calculator
Size a drawer box from the cabinet opening and slide length, then send the parts to a cut optimizer.
Cabinet Door Calculator
Calculate stile, rail and panel sizes for a rail-and-stile cabinet door, then send parts to a cut optimizer.
Kerf Bend Calculator
Calculate saw-kerf count, spacing and depth for a curved panel, then export a full-size marking layout.
Pocket-Hole Screw Calculator
Calculate a recommended pocket-hole screw length from joint geometry and warn if it would blow through the base workpiece.
Segmented Bowl Calculator
Calculate miter angle, trapezoid edge lengths and kerf-aware stock length for a segmented turning ring.
Shelf Pin Layout Calculator
Generate a full-size, printable shelf-pin drilling template at the 32 mm system pitch or a custom pitch.
Shelf Sag Calculator
Estimate center deflection of a shelf under a uniform or center point load from span, dimensions and modulus of elasticity.
Bay-Window Miter Set
Find matching miter-saw settings and trim long-point offsets for polygon corners or measured bay-window turns.
Drawer-Slide Clearance
Size a drawer box from cabinet opening dimensions and editable side, top, bottom and rear slide clearances.
Cabinet Door Collision
Check two perpendicular corner cabinet doors at chosen opening angles with a top-view collision diagram.
Face Frame Layout
Divide a cabinet face frame into equal openings and generate an optimizer-ready stile and rail cut list.
Drawer Pull Template
Calculate centered knob or pull holes and print a full-scale drawer-front drilling template.
Hinge Cup Template
Lay out editable concealed-hinge cup centers and screw holes on a full-height printable door template.
Construction
Fence post spacing calculator
Calculate equal fence bays, post counts, centre positions and clear gaps for an open run or closed loop.
Board and batten spacing calculator
Lay out edge-flush battens with equal clear gaps, coordinates, quantities and waste.
Wall framing layout and quantity calculator
Create stud coordinates and cut lists with plates, one door/window opening, explicit header assumptions and waste.
Deck layout planner
Edit a 2D deck plan with board direction, L-shaped cutout, support positions, stock cuts, costs and PDF/SVG/CSV exports.
Framing cost calculator
Price purchased studs, plates, headers, connectors and crew labor with explicit markup and tax assumptions.
Drywall installation cost calculator
Calculate whole panels, opening deductions, layers, waste and user-priced installation costs.
Construction material dimensions guide
Compare actual and coordinating brick/block sizes, lumber and crown dimensions with manufacturer references.
Stair landing layout calculator
Plan two flights with uniform risers, landing elevation, straight/L/U footprint and downloadable diagrams.
Spiral stair dimension planner
Calculate spiral diameter, riser height, angular pitch, walking-line arc/chord and tread elevation table.
Pipe seal catalog selector
Find exact PSI 2023.1 seal models, element counts and article numbers for measured hole and pipe diameters.
Deck load demand worksheet
Calculate uniform deck load demand and whole support-line reactions for one simple span, using entered loads.
DCA6 Southern Pine span reference
Look up the limited Southern Pine No. 2 span subset from AWC DCA6-2015 Tables 2 and 3A with explicit scope checks.
Footing bearing-area arithmetic
Calculate bearing-only area from centred service compression and verified allowable soil pressure; no footing thickness design.
Shear stress reference calculation
Calculate average direct shear, rectangular-beam maximum shear or local VQ/It stress with an explicit section model.
Thin-wall cylinder membrane stress
Estimate thin-wall cylinder hoop and closed-end axial membrane stresses for static internal pressure with D/t greater than 20.
Single-slope roof layout and materials
Calculate single-slope roof area, entered-spacing rafter centres and effective-covering piece quantities.
Baluster Spacing Calculator
Enter the railing opening, baluster width and maximum gap you intend to use to calculate an equal-spacing layout.
Fence Picket Spacing
Lay out fence picket spacing across a run, with a live diagram of the finished fence section.
Stair Calculator
Work out riser and tread count, riser height and stair angle from total rise and run.
Roof Pitch Calculator
Visualize roof pitch as rise/run, degrees and a scaled triangle diagram.
Tile Layout Calculator
Plan a tile grid across a room, centered or edge-started, with grout gaps and edge-cut sizes.
Concrete Volume Calculator
Calculate concrete volume for a slab, footing, column or cylinder, with a labeled diagram.
Gravel Calculator
Calculate how much gravel, mulch or soil you need for an area and depth.
Paint Calculator
Calculate how much paint you need for walls, accounting for doors, windows and coats.
Brick Calculator
Estimate the number of bricks or blocks needed for a wall, including mortar joints.
Hip Rafter Calculator
Calculate hip rafter length and angle plus a full jack-rafter length table for a hip corner.
Advanced Hip/Valley/Jack
Calculate hip, valley and jack rafter seat cuts and compound cheek (side) cuts, beyond length and plumb angle alone.
Compound Crown Molding
Calculate the flat-cut compound miter and bevel saw settings for crown molding from spring angle and wall corner angle.
Birdsmouth Calculator
Turn roof pitch and plate width into birdsmouth seat, notch depth and height-above-plate dimensions.
Winder Stair Layout
Lay out a balanced quarter-turn winder stair with tread geometry, walk-line goings and a scaled plan diagram.
Irregular Hip Roof
Calculate the shifted plan angle, true hip length, face-specific backing bevels and jack differences for unequal roof pitches.
Unequal-Pitch Valley
Calculate internal valley centerline geometry, separate backing bevels and side-specific jack differences for two unequal roof pitches.
Polygon Roof Calculator
Calculate common and hip centerline rafters, rise, plan angles and roof-face area for regular 3–16-sided roofs.
Shed Dormer Framing
Intersect a shed-dormer roof with the main roof to find tie-in location, rafter length and theoretical cheek-valley line.
Packaging
RSC Carton Layout
Draw a basic RSC-style cut and fold layout for early sizing and mock-ups from internal carton dimensions.
Label Sheet Generator
Define label size, gaps and margins to generate a printable grid of blank label outlines.
Label Roll Calculator
Calculate label roll length, label count and labels remaining from core and roll diameters.
Corrugated Box Weight
Estimate RSC blank area, board grammage, box weight and material cost from editable paper and flute inputs.
Logistics
Pallet Layout Calculator
Estimate identical cartons per uniform pallet layer in one orientation, with a top-down layout and stacking totals.
CBM Calculator
Calculate cubic meters (CBM) for one or more cartons, with a scaled cuboid visualization.
Dimensional Weight Calculator
Calculate dimensional (volumetric) weight from carton size and a configurable divisor.
Container Carton Estimate
Estimate identical cartons in a container using one uniform orientation, with a simple layer preview.
LDM Calculator
Calculate loading metres for road freight from cargo footprint, quantity and stack layers.
LCL Revenue Ton Calculator
Compare shipment CBM with its weight basis to estimate LCL revenue tons and base freight.
Contractor Business
Loaded Labor Rate
Build the fully-loaded hourly cost and bill rate behind a bare wage, with a visual cost-stack breakdown.
Roofing Piece Rate
Calculate roofing labor and material cost per square from roof area, piece rate, crew capacity and waste factor.
Crew Cost Per Day
Blend a mixed-role crew's daily labor cost and compare it against expected piece-rate revenue for the day.
Bid Price Builder
Build a bid price from labor, material, other cost, overhead, contingency and target profit margin, with a visual cost stack.
Painting Labor
Price painting application labor per square foot per coat and estimate crew time from an editable productivity rate.
Minimum Service Call
Price a minimum service visit from travel, admin and onsite loaded labor, vehicle cost, consumables and target margin.
Billable Rate
Convert annual compensation, burden, overhead and realistic billable utilization into break-even and target-margin hourly rates.
Layout & Planning
Even Spacing Calculator
Evenly space any number of objects across an opening - holes, hooks, posts, anything.
Gallery Wall Planner
Plan evenly spaced picture frames across a wall, centered, with a scaled wall diagram.
Dining Table Planner
See how many seats fit around a table and whether the table and chairs fit your room.
Picture Hanging Calculator
Find exact wall fixing height and horizontal coordinates from frame size, centre height and real hardware drop.
Off-Grid & DC Power
DC Voltage Drop
Find the thinnest standard copper wire gauge that keeps voltage drop at or below your target for a 12V, 24V or 48V DC circuit.
Solar & Battery Sizing
Size a solar array and battery bank from your daily energy use, peak sun hours, system losses, depth of discharge and days of autonomy.
Fit & Clearance
Refrigerator Clearance
Compare a refrigerator case with its measured opening and editable manufacturer side, top and rear clearances.
Dishwasher Clearance
Check dishwasher body clearances and the fully open door against the available aisle.
Sofa Route Checker
Screen upright, on-back and end-first sofa orientations against a doorway and the route's narrowest clearance.