Volume Calculator (Every Solid, Every Unit)
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Updated
Pick a solid, enter the dimensions in metres or feet, and get the volume — plus the same volume in cubic metres, cubic feet (cft), litres and brass. Exact geometry, useful for concrete, excavation and water-tank work.
Volume Calculator — any solid, any unit
Box, cylinder, cone, sphere and more — with m³, cft, litres and brass
A 125 mm slab is 0.125 m
Box / Cuboid volume
3 m³
L × W × H · measured in m
Cubic metre
3 m³
Cubic feet
105.94 cft
Litres
3,000 L
Brass
1.059 brass
The same volume in every unit
m³
3
cft
105.94
litres
3,000
brass
1.059
cubic yard
3.92
US gallons
792.52
cm³
30,00,000
Exact geometry, not an estimate. Use it for concrete and excavation volumes, water-tank capacity (in litres), and ordering sand or aggregate in brass. To turn a wet concrete volume into cement, sand and aggregate, take it to the concrete calculator (dry volume ×1.54).
Volume formulas used
| Solid | Volume formula |
|---|---|
| Box / cuboid | L × W × H |
| Cube | side³ |
| Cylinder | π × radius² × height |
| Sphere | 4⁄3 × π × radius³ |
| Hemisphere | 2⁄3 × π × radius³ |
| Cone | 1⁄3 × π × radius² × height |
| Pyramid | 1⁄3 × (L × W) × H |
| Triangular prism | ½ × base × height × length |
Where a volume calculator helps on a build
- Concrete — a slab, footing or column is a box or cylinder; get the wet volume here, then take it to the concrete calculator for cement, sand and aggregate (dry volume = wet × 1.54).
- Excavation — a pit or trench volume for earthwork and disposal.
- Water tanks — a tank's capacity in litres (1 m³ = 1,000 L); a 1,000 L tank suits a family of 5–6.
- Ordering sand & aggregate — quoted in brass (1 brass = 100 cft ≈ 2.83 m³) (brass conversion).
Worked example
A slab 5 m × 4 m × 0.125 m (a 125 mm slab) has a volume of 5 × 4 × 0.125 = 2.5 m³, which is about 88.29 cft, 2,500 litres and 0.883 brass. As dry concrete material that is about 2.5 × 1.54 = 3.85 m³ of cement, sand and aggregate together.
Cylinder / round tank capacity
For a round overhead tank of radius 0.6 m and height 1 m: π × 0.6² × 1 = 1.131 m³ = 1,131 litres. Switch the shape to Cylinder above and enter your dimensions.
Frequently asked questions
How do I calculate the volume of concrete for a slab? Multiply length × width × thickness (all in metres) for the wet volume — a 5 × 4 × 0.125 m slab is 2.5 m³. For cement, sand and aggregate, multiply by 1.54 for dry volume and split by the mix ratio.
How do I convert cubic metres to cubic feet? 1 m³ = 35.3147 cft. The calculator shows m³, cft, litres and brass together.
What is the volume of a cylinder? π × radius² × height. For radius 0.5 m and height 2 m, the volume is about 1.571 m³.
How many litres is 1 cubic metre? 1 cubic metre = 1,000 litres — handy for sizing water tanks.
What is a brass in volume? 1 brass = 100 cubic feet ≈ 2.83 m³, the unit sand and aggregate are sold in across much of India.
Related
CivilSite Editorial Team✓ Engineer reviewed
Written and reviewed by practising civil engineers with 10+ years of Indian residential construction experience.