Planning

Concrete Mix Ratio Calculator

Calculate the correct proportions of cement, sand, and aggregate for your concrete mix. This calculator helps you achieve the right strength and consistency for various applications.

Enter Your Measurements
Formula Used
Cement = Volume ÷ (1 + Sand Ratio + Aggregate Ratio)
Sand = Cement × Sand Ratio
Aggregate = Cement × Aggregate Ratio
Pro Tips
  • •Add water gradually - too much weakens concrete
  • •Water-cement ratio should be 0.4-0.6
  • •Use clean, potable water for mixing
  • •Mix for 3-5 minutes for best results
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Frequently Asked Questions

What is the best concrete mix ratio?

For most projects, a 1:2:3 ratio (cement:sand:aggregate) produces good strength concrete around 3000 PSI.

How much water should I add to concrete mix?

The water-cement ratio should be 0.4-0.6. For a 94 lb bag of cement, use about 5-6 gallons of water for workable concrete.