Concrete Volume and Material Calculator
Calculate the concrete volume and cement-sand-gravel quantity for slabs/foundations.
Enter the dimensions; let's calculate the concrete volume and the required cement, sand, gravel and water (approximately C20).
m
m
cm
Result
3 m³
Concrete volume: 3 m³
Result in all units
Step-by-step solution
Volume = width × length × thickness
What Is Concrete Calculation?
Concrete calculation is the process of finding the volume of the element to be poured to determine the required cubic meters of concrete and the amount of cement, sand and gravel within it. It is used for accurate ordering and budgeting.
How is it calculated?
How Is Concrete Calculated?
Volume = width × length × thickness (m)
- Enter the dimensions of the element in meters.
- For 1 m³ you need approximately 300–350 kg of cement, 0.5 m³ of sand and 0.8 m³ of gravel.
- Add 5–10% waste allowance to your order.
Frequently Asked Questions
How many m³ for a 15 cm slab over 20 m²?
20 × 0.15 = 3 m³ of concrete is needed.