Enter the bed length, width, and fill depth to get cubic feet, cubic yards, and the number of bags.
Raised beds fill by volume, which is always more than the area suggests — a 4×8 bed a foot deep is about 32 cubic feet. This view takes bed length, width, and depth; top up after the first watering settles the mix.
Why order extra? The headline number is the exact material your project needs. When you actually order, add about 5–10% on top — the “with 5% waste” figure in the result is a safe starting point. That margin covers what you lose to compaction, cuts around edges and corners, and ordinary spillage during handling. It is cheaper to have a little left over than to stop mid-job and wait on a second delivery.