All Tools
Every free, working ToolHuts tool, grouped by category.
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
Compare physical pixel density with angular pixels per degree for any resolution, diagonal and viewing distance.
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
Solve 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.
Automotive
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.
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.
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.
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.
Workshop
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 bend allowance, bend deduction and setback for a sheet metal bend, with a diagram.
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.
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.
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.
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.
Woodworking
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.
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
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.
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.