Pot Soil Volume Calculator
Potting mix needed to fill round planters and containers.
cm
cm
%
L
How it works
Volume = π × (diameter ÷ 2)² × height × fill level, converted from cm³ to litres by dividing by 1,000. It treats the pot as a straight-sided cylinder, so tapered pots hold a bit less than shown. Filling to 90% leaves room for watering. Example: with the default values, one 30 × 25 cm pot takes 15.9 litres.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.