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Water-Cement
Ratio
Calculator
Calculate water-cement ratio for target concrete strength per ACI 211
Input Parameters
Target Strength (f'c) (psi)
Target Slump (inches)
Max Aggregate Size (inches)
Calculate
Results
--
W/C Ratio
--
Water Content
lb/yd³
--
Cement Content
lb/yd³
Reference
W/C = log10(14000/f'c) / 1.25 Water ~ 280 + 5*slump - 20*agg_size (lb/yd³)