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Cement Calculator
Calculate cement bags and weight for any mix volume.
For a mix ratio like 1:2:4 (cement:sand:gravel), cement is 1 of 7 parts. Cement volume = mix volume × parts/7. Weight uses ≈1500 kg/m³ of cement.
How it works
For a mix ratio like 1:2:4 (cement:sand:gravel), cement is 1 of 7 parts. Cement volume = mix volume × parts/7. Weight uses ≈1500 kg/m³ of cement.
Worked example
1 m³ of 1:2:4 mix needs 1/7 m³ of cement ≈ 214 kg ≈ 9 bags of 25 kg.
Recommendations
- Use 1:2:4 (general concrete) or 1:3 (mortar)
- Add a plasticizer for better workability
- Never exceed the water ratio stated by the manufacturer
Tips & advice
- Store cement bags off the ground and dry
- Mix the dry ingredients before adding water
- Use fresh cement — it loses strength after ~3 months
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Cement Calculator
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Use the calculatorInvoice Generator FAQs
Yes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
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