Concrete Calculator
Calculate concrete volume and estimate cement bags, sand, and coarse aggregate for a selected nominal mix ratio.
Last updated: 2026-10-26
Free Online Concrete Calculator
Use this free online concrete calculator tool directly in your browser without installing software. Fast, mobile friendly and easy to use.
Concrete Calculator
Enter measurements to calculate an estimate. Results are informational.
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About This Tool
About Concrete Calculator
Calculate wet concrete volume from dimensions, then estimate cement bags, sand, and coarse aggregate using a selected nominal mix ratio, cement bag size, and wastage allowance. Processing runs locally in your browser.
How to use it
Enter length, width, depth and wastage. Choose the nominal ratio and cement bag size, then calculate. The material quantities are preliminary estimates, not a designed concrete mix.
Frequently Asked Questions
What materials are estimated?
The calculator estimates cement by weight and bags, sand volume, and coarse aggregate volume from the selected nominal ratio.
Is my input uploaded?
Processing is performed in your browser wherever practical. Network lookups use the named public DNS-over-HTTPS service.
Does this work on mobile?
The interface is responsive and works in current desktop and mobile browsers.
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