Concrete Volume Calculator
Enter length, width, and depth for concrete volume and bag count.
How much concrete to order
Pouring a slab, footing, or pad starts with knowing the volume, and concrete is sold by the cubic yard or in bags. This calculator turns length, width, and depth into the volume and an estimated number of bags.
A 10 by 10 foot pad, 4 inches (0.33 ft) deep, is about 33 cubic feet — roughly 1.2 cubic yards or 55 eighty-pound bags. For anything sizeable, ready-mix by the yard is usually cheaper than bags.
Practical and private
It multiplies the three dimensions, converts to yards and metres, and estimates bags in your browser with nothing uploaded.
Frequently Asked Questions
What units does it use?
Feet for the dimensions, returning cubic feet, cubic yards, and cubic metres, since ready-mix and bags are sold by those.
How does it estimate bags?
It divides the volume by the yield of a standard 80 lb bag, about 0.6 cubic feet, and rounds up.
Should I order extra?
Yes — a 5–10% overage covers spillage, uneven subgrade, and forms that are slightly larger than nominal.
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