Enter the container size and count to get total cubic feet and the number of potting-mix bags to buy.
Containers add up fast, so this view sums pot volume across your count. Use a true potting mix, not garden soil, in containers — dense soil compacts and suffocates roots in a pot.
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.