CivilTech Studio
Concrete Mix Design Calculator
Free online concrete mix design calculator — IS 10262:2019, ACI 211.1 and BS 8500 / EN 206.
- All three codes side-by-side
- Cement-type optimisation
- Trial-mix correction
- Excel & PDF export
- IS 10262:2019
- ACI 211.1
- BS 8500 / EN 206
What it does
Everything the check needs, in one pass
Design economical concrete mixes from scratch. Enter target grade, exposure condition, cement type and aggregate properties; get water/cement ratio, mix proportions, trial mix correction and a printable mix design report.
All three codes side-by-side
Switch between IS, ACI and EN methods and compare proportions for the same target grade — useful for export jobs and site reviews.
Cement-type optimisation
OPC 33 / 43 / 53, PPC and PSC each give different w/c ratios. The calculator returns the most economical cement choice for your grade and exposure.
Trial-mix correction
Plug in actual slump and density from a trial batch; the tool re-proportions for the next batch automatically.
Excel & PDF export
Download a stamped mix design report and an Excel sheet engineers can edit on site.
How it works
From inputs to a signed-off result
- Step 1
Pick target grade & exposure
M20–M80 (or 20–80 MPa). Exposure determines minimum cement content and maximum w/c ratio.
- Step 2
Enter material properties
Specific gravity, absorption, fineness modulus and moisture content of fine and coarse aggregates.
- Step 3
Solve mix proportions
Step-by-step IS 10262 / ACI 211 / EN 206 calculation: target mean strength, w/c ratio, water content, cement content, aggregate content.
- Step 4
Adjust for trial batch
Update with actual slump/density and re-balance; the tool tracks each correction in a history log.
Standards
Checked against the code, clause by clause
Every result cites the clause it came from, so a reviewer can follow the same path you did.
IS 10262:2019
Indian concrete mix design recommendations
ACI 211.1
American absolute-volume mix design method
BS 8500 / EN 206
European concrete specification & mix design
Who it’s for
Where engineers reach for it
Standard M25 slab pour
Residential building slabs and beams — moderate exposure, OPC 43.
High-strength M60 column
Tall buildings and bridges where compressive stresses demand silica-fume admixtures.
Marine exposure M40
Coastal jetties and piers — w/c ratio and minimum cement content are governed by chloride exposure.
PPC mix for hot weather concreting
Lower heat of hydration; the tool adjusts w/c and admixture dose for ambient temperature.
FAQ
Questions, answered
Something else? Open Concrete Mix Design and try it with your own numbers.
Which IS code does it follow?
IS 10262:2019 — the latest revision of the Indian Standard for concrete mix proportioning, including the corrected target mean strength formula.
Can I design high-strength M60+ mixes?
Yes. Grades up to M80 are supported, including silica-fume and superplasticiser corrections.
Does it correct for aggregate moisture?
Yes. Surface moisture and absorption are subtracted/added to the mix water automatically — the displayed water content is the free water.
Can I generate a mix design report for site approval?
Yes. The PDF includes target mean strength, w/c ratio, mix proportions per m³ and a trial-mix log signed off by your engineer.
Is the result the same as the ACI 211 method?
No — IS, ACI and EN 206 methods give slightly different proportions because of differences in target strength margins and aggregate grading assumptions. The calculator shows all three side-by-side.
Open Concrete Mix Design and run your numbers
Free online concrete mix design calculator — IS 10262:2019, ACI 211.1 and BS 8500 / EN 206.
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