Fineness Modulus Calculator (Sand)
FM of fine aggregate from cumulative %-retained on the six standard sieves — with the coarseness verdict.
FM is a single-number fingerprint of grading — two sands with equal FM can still grade differently, so check the zone curve (IS 383 Zones I–IV) too. Concrete wants 2.6–2.9; plaster 1.5–2.2.
Formula
Fineness Modulus Calculator (Sand) is a free fineness modulus for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Fineness Modulus Calculator (Sand)
FM of fine aggregate from cumulative %-retained on the six standard sieves — with the coarseness verdict. The calculation implements FM = Σ(cumulative % retained on standard sieves) ÷ 100 (IS 383:2016; ASTM C136 sieve analysis). FM is a single-number fingerprint of grading — two sands with equal FM can still grade differently, so check the zone curve (IS 383 Zones I–IV) too. Concrete wants 2.6–2.9; plaster 1.5–2.2.
How to use Fineness Modulus Calculator (Sand)
- 1Enter Cum. % retained on 4.75 mm in %.
- 2Enter Cum. % retained on 2.36 mm in %.
- 3Enter Cum. % retained on 1.18 mm in %.
- 4Enter Cum. % retained on 600 µm in %.
- 5Read Fineness modulus instantly — no submit button needed.
Why use Fineness Modulus Calculator (Sand)?
- ✓Implements the standard formula — FM = Σ(cumulative % retained on standard sieves) ÷ 100
- ✓Reference cited on-page: IS 383:2016; ASTM C136 sieve analysis
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Fineness Modulus Calculator (Sand) use?+
It computes FM = Σ(cumulative % retained on standard sieves) ÷ 100, per IS 383:2016; ASTM C136 sieve analysis. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
FM is a single-number fingerprint of grading — two sands with equal FM can still grade differently, so check the zone curve (IS 383 Zones I–IV) too. Concrete wants 2.6–2.9; plaster 1.5–2.2.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Fineness Modulus Calculator (Sand) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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