Soil volume for pots and raised beds

Measure the inside of the container up to the intended soil level. A tapered pot will hold less than a cylinder of the same top diameter.

Method and limitations

Rectangle: length × width × fill depth. Cylinder: π × (diameter ÷ 2)² × fill depth. Divide cm³ by 1,000 for litres; one cubic inch is 0.016387064 litres. Bag counts round up using the bag size you enter. Compaction, drainage layers and taper are not included.