Concrete Calculator
Calculate concrete volume, cement bags and mix ratios for slabs, circular pads and post holes. Get quantities for premix bags or DIY mixing with cost estimates.
Shape Type
Dimensions
Concrete Mix
Standard Mix (1:2:3)
1 part cement : 2 parts sand : 3 parts aggregate
Suitable for general slabs, paths, and foundations
Results
Volume
0.600 m³
(600 litres)
Estimated Weight
1440 kg
(~1.4 tonnes)
Premix Bags Required
Each 20kg bag makes ~0.009m³ of ready-to-use concrete (just add water)
Cost Estimate
Estimated costs vary by supplier. DIY mix is usually cheaper but requires more labour.
Concrete Tips
- • Standard concrete thickness: 100mm for paths, 150mm for driveways
- • Always add 10% extra for spillage and waste
- • Mix ratios: General (1:2:3), Strong (1:1.5:3), Lightweight (1:4:4)
- • Let concrete cure for at least 7 days before use
- • Premix bags are convenient for small projects; ready-mix trucks for large areas
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