Concrete Calculator
Choose a shape, enter its dimensions and see the concrete volume, weight and number of bags needed.
Your details
Result
Concrete volume
0.600 m³
0.78 cubic yards
- Concrete weight
- 1,440 kg (1.44 t)
- Bags needed (25 kg)
- 50
- Assumes 2,400 kg/m³. Buy 5–10% extra for uneven ground and spillage. Follow the mix guidance for your project.
Good to know: A slab 3 m × 2 m × 10 cm needs 0.6 m³, about 1,440 kg of concrete.
Please note: Estimates only. Measure your actual space, buy a little extra, and check product labels, safety requirements and local building rules. Do not rely on this for structural or safety-critical work.
About this tool
Calculate concrete volume for slabs, footings, and columns — for construction, DIY projects, and contractor estimates.
Formula
Volume = length × width × depth. Convert to cubic yards by dividing cubic feet by 27.
Reference values
- 1 cubic yard = 27 cubic feet
- 1 cubic meter = 35.31 cubic feet
- Typical slab depth: 4-6 inches
Questions people ask
How much extra concrete should I order?
Around 5–10% more, to cover uneven ground and spillage.
How many bags in a cubic metre?
It depends on the bag size. The tool shows the number for 20 kg, 25 kg or 40 kg bags.
Does this tell me the mix?
No. Follow the mix guidance for your project or ask a builder.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it. How we check our calculators