Unit Converter
Concrete Calculator
Estimate concrete volume in cubic meters and cubic yards from length, width, thickness, and waste factor.
Formula and usage notes
Use this concrete calculator for slabs, pads, small footings, shed bases, and early material planning.
Volume = length × width × thickness. Add waste factor after the base volume. Metric thickness is centimeters; imperial thickness is inches.
Practical examples
Practical examples 1
4 m × 3 m × 10 cm = 1.2 m³ before waste
Practical examples 2
10 ft × 12 ft × 4 in is about 1.48 yd³ before waste
Practical examples 3
Add 5-10% for small pours
Practical examples 4
Round up material orders to match local supplier packaging
Frequently asked questions
Is this a structural design tool?
No. It is a volume estimate. Follow local codes, plans, and contractor guidance for structural work.
How much waste should I add?
Small pours often use 5-10% extra for uneven ground, spillage, and measurement tolerance.
Why show both m³ and yd³?
Concrete suppliers quote different units by region, so both values help compare orders.