Concrete

Concrete calculators

Pick a concrete estimator and get an instant, overbuy-proof number in under a minute.

Enter your slab dimensions to get cubic yards, the number of 80-lb bags, and an optional cost estimate — with a waste margin so you don’t run short.

Enter your post count, hole size, and depth to get the exact number of concrete bags — no more guessing a bag per post and running short.

Concrete calculator questions

Are Yardly calculators free?

Yes — every calculator is free and works without creating an account.

Do I need to sign up?

No. Open any tool, type your dimensions, and get an estimate. No email, no paywall.

How does Yardly make money?

Yardly is supported by advertising. We don’t sell products and we never charge you to use a calculator.

Can I suggest a new calculator?

Absolutely — reach out on our contact page and we’ll consider it for the next batch.