Mortar Calculator (Cement & Sand)
Cement bags and sand for any mortar ratio and volume.
1 m³ of 1:4 mortar ≈ 7.7 bags; 1:6 ≈ 5.5 bags. Richer is NOT better for masonry — over-strong mortar cracks the bricks instead of the joints, the wrong place to fail.
Formula
Mortar Calculator (Cement & Sand) is a free mortar calculator 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 Mortar Calculator (Cement & Sand)
Cement bags and sand for any mortar ratio and volume. The calculation implements dry = 1.33×wet; cement = dry/(1+n); 1,440 kg/m³ ÷ 50 (IS 2250 — mortar preparation). 1 m³ of 1:4 mortar ≈ 7.7 bags; 1:6 ≈ 5.5 bags. Richer is NOT better for masonry — over-strong mortar cracks the bricks instead of the joints, the wrong place to fail.
How to use Mortar Calculator (Cement & Sand)
- 1Enter Wet mortar volume in m³.
- 2Enter Sand parts (per 1 cement) (Brickwork 1:6 · plaster 1:4 · repointing 1:3).
- 3Read Cement bags (50 kg), Sand instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Mortar Calculator (Cement & Sand)?
- ✓Implements the standard formula — dry = 1.33×wet; cement = dry/(1+n); 1,440 kg/m³ ÷ 50
- ✓Reference cited on-page: IS 2250 — mortar preparation
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Mortar Calculator (Cement & Sand) use?+
It computes dry = 1.33×wet; cement = dry/(1+n); 1,440 kg/m³ ÷ 50, per IS 2250 — mortar preparation. 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?+
1 m³ of 1:4 mortar ≈ 7.7 bags; 1:6 ≈ 5.5 bags. Richer is NOT better for masonry — over-strong mortar cracks the bricks instead of the joints, the wrong place to fail.
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 Mortar Calculator (Cement & 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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