Concrete Calculator
Calculate the exact amount of cement, sand, gravel, and water needed for your concrete project. Choose from different concrete mix ratios for various construction needs.
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Concrete is a mixture of cement, sand (fine aggregate), gravel (coarse aggregate), and water. The ratio of these materials determines the strength and characteristics of the final concrete.
Common Concrete Mix Types:
Structural Concrete (1:2:3)
High strength concrete for foundations, columns, and load-bearing structures. Provides excellent durability and compressive strength.
Standard Concrete (1:2.5:3.5)
General purpose concrete for driveways, sidewalks, and moderate load applications. Good balance of strength and economy.
Lean Concrete (1:3:6)
Lower strength concrete for non-structural applications like leveling courses and mass concrete work.
Rich Concrete (1:1.5:3)
High cement content for maximum strength applications like precast elements and high-stress structures.
Tips for Concrete Mixing:
- Always use clean water and aggregates free from organic matter
- Maintain proper water-cement ratio for desired strength
- Mix thoroughly to ensure uniform distribution of materials
- Pour and finish concrete within 30-45 minutes of mixing
- Cure concrete properly by keeping it moist for at least 7 days
- Consider weather conditions - avoid pouring in extreme temperatures
This concrete calculator provides approximate material quantities. Always consult with structural engineers for critical applications and consider local building codes and material specifications.