Concrete Strength Calculator

Estimate concrete compressive strength based on water-cement ratio using Abrams law

Input Parameters

Results

--
Est. f'c
psi
--
Est. f'c
MPa
--
% of 28-day
%

Reference

Abrams' Law: f'c = 14000 / 10^(1.25 * w/c) Age factor: t / (4 + 0.85*t)