Gravel Calculator
Walk, patio base, or driveway — same math. Pick the job, then enter length, width, and depth.
What to buy
This load is about a cubic yard or more. A bulk delivery is usually cheaper than that many bags.
How the numbers are figured
Volume is length × width × depth. Depth in inches is divided by 12 so the result is in cubic feet. Divide by 27 for cubic yards. Bag counts use 0.5 cubic feet per bag, the yield listed for a common 50 lb all-purpose gravel bag, then round up. Tons multiply cubic yards by 1.4, a typical crushed-gravel weight. Stone size and moisture change the scale weight. Ask the yard.
Walks, patio bases, and driveways use the same math. The Project menu only changes the starting depth.
Common questions
How much gravel for a 10x10 area?
A 10 by 10 foot area at 4 inches takes about 1.23 cubic yards, or 67 bags of 0.5 cubic feet, before waste. With 10% extra, plan on 1.36 cubic yards and 74 bags.
How many bags of gravel in a cubic yard?
One cubic yard is 27 cubic feet. At 0.5 cubic feet per bag, that is 54 bags. A common 50 lb all-purpose gravel bag is sold at that volume.
Do I order gravel by the bag or the yard?
Bags are practical under about one cubic yard. Larger walks and driveways are usually cheaper as a bulk load. Plants often sell by the ton. This page uses 1.4 tons per cubic yard as a typical crushed-gravel estimate. Ask the yard.