Planter Size and Soil Calculator

Free tool, runs in your browser

Moving a plant up one correct size at a time is the difference between an upgrade and a slow-motion root rot experiment. Enter what you have and this tool returns the pot to buy, the soil to buy, and roughly what the trip will cost.

Current pot diameter (inches, measured across the top) Plant type

How root-bound is it?

Planter material you are shopping for

Estimates assume standard-proportion pots (about as tall as wide) and typical 2026 US retail prices; bowls need less soil and tall cylinders more. Details behind the numbers live in the planter size guide and cost guide.