Concrete Calculator
Enter the dimensions for concrete and use the Concrete Calculator to compare a few options. Confirm important quantities with product instructions or a qualified tradesperson.
Buy about 5–10% extra to allow for spillage and uneven ground.
✉ Email me this result
</> Embed this calculator
Paste this into any website or blog post. It is free — the small "powered by" link must stay visible.
How it works
Volume is length times width times thickness, with thickness converted from inches to feet, giving cubic feet. Dividing by 27 gives cubic yards. Bag counts assume a 60 lb bag yields about 0.45 cubic feet and an 80 lb bag about 0.6 cubic feet of set concrete.
How to use the Concrete Calculator
Enter the values requested by the tool and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options. Keeping a note of the original figures makes the calculation easier to check later.
Allow for waste, product packaging, site conditions and local requirements. A tradesperson or supplier can confirm the quantity needed for the actual job.