POTTING-MIX CALCULATOR
A little less guesswork
at the garden center.
Measure the inside of your container and estimate the potting mix you’ll need.
YOUR ESTIMATE
Enter your measurements to calculate volume.
Use fill depth below the watering rim, not total pot height. This geometric estimate treats the container as a cylinder or rectangular box. Tapered pots hold less. Roots, existing mix, settling, and irregular shapes change the amount you actually need. No extra gravel layer is included.
Choose a suitable potting mix