Herramientas prácticas para trabajos de precisión
Calculadora de Volumen de Concreto
Calcule el volumen de concreto para una losa, zapata, columna o cilindro, con un diagrama etiquetado.
How it works
How to use it: pick a shape, then fill in the three dimension fields - their meaning changes with the shape you choose. For a slab or footing, "length" and "width" are the two plan dimensions and "depth" is thickness. For a rectangular column, the same three fields become width, depth and height. For a cylinder, "length" becomes diameter and "depth" becomes height (the width field is unused).
Formula. Slab and column volume is the product of the three dimensions; a cylinder's volume uses its radius (half the diameter):
Slab / column volume = length × width × depthCylinder volume = π × (diameter ÷ 2)² × height
All three dimensions are entered in millimetres; the result is converted to cubic metres (÷ 1e9), US cubic yards (× 1.30795 per m³), and litres (÷ 1e6).
Worked example. With the defaults above (slab, 5000 mm × 3000 mm × 100 mm thick): volume = 5000 × 3000 × 100 = 1,500,000,000 mm³ = 1.500 m³, which is 1.500 × 1.30795 ≈ 1.962 yd³, or 1500 L.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Shape
- Slab / footing
- Length / diameter
- 5000 mm
- Width / depth
- 3000 mm
- Thickness / height
- 100 mm
Primary result: Volume: 1.500 m3.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
This is a pure geometric volume - it does not add an ordering allowance for spillage, formwork deflection, uneven sub-grade or over-excavation, or for rounding up to a ready-mix supplier's minimum load or delivery increment. A commonly used margin is 5-10% on top of the calculated volume; confirm the right allowance with your supplier.
It also doesn't account for rebar/mesh displacement, sloped or stepped footings, or column volume lost to embedded items - for anything other than a simple slab, rectangular column, or plain cylinder, break the pour into these basic shapes and sum the results.
Frequently asked questions
Should I round up before ordering ready-mix concrete?
Yes. This tool gives the theoretical geometric volume only. Ready-mix suppliers typically sell in fixed increments and most contractors add 5-10% over the calculated volume to cover spillage and sub-grade variation - ask your supplier what minimum load and increment they work in.
Which fields do I fill in for a cylinder?
Use "Length / diameter" for the diameter and "Thickness / height" for the height; the "Width / depth" field is ignored for this shape.
How do I calculate an L-shaped or irregular slab?
Split it into rectangular sections, calculate each one separately using the slab option, and add the resulting volumes together.
Herramientas relacionadas
Calculadora de Grava
Calcule cuánta grava, mantillo o tierra necesita para un área y una profundidad determinadas.
Calculadora de Espaciado de Balaustres
Ingrese la abertura de la baranda, el ancho del balaustre y el espacio máximo que planea usar para calcular una distribución de espaciado uniforme.
Espaciado de Tablas de Cerca
Trace el espaciado de las tablas de la cerca a lo largo de un tramo, con un diagrama en vivo de la sección de cerca terminada.
Calculadora de Escalera
Calcule la cantidad de contrahuellas y huellas, la altura de contrahuella y el ángulo de la escalera a partir de la elevación y el recorrido totales.