Mass Concrete Calculator
Calculate cement, sand and gravel for mass concrete.
The Mass Concrete Calculator is a free tool designed for construction professionals and enthusiasts. Calculate cement, sand and gravel for mass concrete. Instantly get the required materials broken down by purchase units, with an option to add a wastage allowance so you never run short on site.
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How to Use This Calculator
- Measure the element dimensions (length, width, height) with a tape and note them in meters.
- Enter the values in the form fields.
- If reinforcement is needed, enter the steel ratio in kg/m³ (typical: 80–150 kg/m³).
- Adjust the wastage allowance (recommended 5–10 %) to cover on-site losses.
- Click 'Calculate' to get concrete volume, cement bags, sand, gravel and steel.
Frequently Asked Questions
For standard concrete (250 kg/m³ mix), you need 5 bags of 50 kg per m³. For structural concrete (300 kg/m³), use 6 bags. This calculator uses the typical dosage for each element type.
On-site losses from spillage, unusable mixes and level corrections always occur. Adding 5–10 % to your final order ensures you don't run short of material.
Mass concrete has no steel reinforcement and is used for low-load foundations. Reinforced concrete includes steel bars that provide tensile strength, making it suitable for slabs, columns and beams.