Concrete Calculator
Calculate concrete volume, cement bags, sand and aggregate for slabs, footings and columns.
Visual breakdown
Detailed breakdown
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What is the Concrete Calculator?
Concrete is a mix of cement, sand and aggregate. This calculator converts the volume you need into the number of cement bags and the quantity of sand and aggregate for the chosen mix grade.
How to use this calculator
- Enter your values in the input fields. Use the sliders where available for quick changes.
- Choose the options that fit your case - currency, number format and decimals can be changed in the Options bar.
- The result updates instantly as you type. Press Calculate to refresh.
- Review the summary, the chart and the detailed table (when shown).
- Use Export & share to download a snapshot image (PNG or JPG), copy the result, print, save a CSV, or copy a link that reopens your inputs.
Formula and method
Dry volume = wet volume x 1.54
Cement = dry x (cement part / sum of parts) ; 1 bag (50 kg) = 0.0347 m³
Worked example
Loading example...
Options you get
- Currency symbol and Indian or international digit grouping
- Decimal places control
- Instant results with charts and tables (where relevant)
- Snapshot image export (PNG / JPG), copy image, CSV, print and share link
- Light and dark themes - works on mobile, tablet and desktop
Frequently asked questions
Which mix for a slab?
M20 (1:1.5:3) is commonly used for residential slabs and beams; M15 for footings and M10 for levelling.
Why 1.54?
Dry materials shrink in volume when mixed with water; 1.54 compensates for it.
Is this calculator free to use?
Yes. All MCSBiz calculators are free, work in your browser and need no sign-up.
Is my data stored or sent to a server?
No. Calculations run on your own device. Your inputs are not uploaded, and nothing is saved unless you choose to share a link or export an image.
Can I save or share my result?
Yes. Use "Download PNG" or "Download JPG" to export a snapshot image, copy the result, print it, download a CSV, or copy a link that reopens the calculator with your inputs.
Important note
Quantities are estimates. Actual requirements depend on site conditions, workmanship and wastage. Always add a safety margin and confirm with your engineer or contractor.