Enter slab length, width, and depth to estimate volume in cubic feet and cubic yards, plus 60 lb and 80 lb bag counts for small pours. Runs on your device.

How to use this tool

1. Enter slab length and width in feet. 2. Enter depth in inches. 3. Click Calculate. 4. Review cubic yards for ready-mix quotes and bag counts for small pours. 5. Add 5–10% extra for uneven subgrade.

Worked example

Example: a 10×10 ft slab 4 inches deep is about 1.23 cubic yards—roughly 34 eighty-pound bags.

How it works

Calculates slab volume in cubic feet and cubic yards from length, width, and depth, then estimates 60 lb and 80 lb bag counts using standard yield assumptions. Runs on your device.

Limitations

Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.

Privacy and file handling

Your data stays on your device and is not uploaded.

FAQ

Frequently asked questions

Is Concrete Calculator free?

Yes. It is free to use and you do not need to sign in or create an account.

Is my data private?

See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.

Can I use Concrete Calculator on mobile?

Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.

Page last reviewed: July 24, 2026

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