Engineering CalculationConcrete Mix Design Calculator - IS 10262:2019
Design a concrete mix as per IS 10262:2019 step by step, from target mean strength to quantities per cubic metre and the final mix proportion.
Open the calculator →Formula
Target strength f'ck = the higher of (fck + 1.65 S) and (fck + X)
S = assumed standard deviation, X = factor by grade (IS 10262:2019 Tables 1 and 2)
Worked example
M25 grade, S = 4.0 N/mm², X = 5.5
f'ck = max(25 + 1.65×4.0, 25 + 5.5) = 31.6 N/mm²
Where engineers use it
- Site mix designs
- Trial mix planning
- RMC and quality control checks
How to use
- Click Open the calculator. It runs free in your browser, on desktop or phone.
- Enter your values. Units and typical ranges are shown next to each input.
- Read the result and the step-by-step working, then print or add it to your Project BOQ.
Questions
Does it evaluate trial mixes?
Yes, the Trial Mix Evaluation calculator fits strength against w/c from your trial results.