Water-Cement Ratio Calculator
Calculate water-cement ratio, concrete mix proportions, and estimated compressive strength for your concrete project.
Step 1: Mix Parameters
Water-Cement Ratio Guidelines
Typical ratios: 0.4-0.6 for normal concrete. Lower ratios (0.35-0.4) for high strength, higher ratios (0.6-0.7) for mass concrete.
Step 2: Strength & Conditions
Strength Development
Concrete gains strength over time: ~65% at 7 days, ~90% at 28 days, 100%+ at 90 days. Curing conditions significantly affect strength.
Concrete Mix Design Results
Summary
Mix Proportions
Strength Analysis
Water-Cement Ratio
0.50
Optimal for 25 MPa concrete
Cement Required
350 kg/m³
Water Required
175 L/m³
Aggregate Required
1850 kg/m³
Estimated Strength
25 MPa
Complete Mix Proportions
| Material | Quantity | Unit | Proportion | Notes |
|---|
Strength vs. Water-Cement Ratio
Water-Cement Ratio Formula
w/c = Water Volume ÷ Cement Weight
Water-cement ratio is the single most important factor affecting concrete strength. Lower ratios produce stronger, more durable concrete but require proper workability management.
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