Soil Volume Calculator
Calculate how much potting soil you need for a round or square pot.
How to Use the Soil Volume Calculator
- Measure the diameter (or side length) of your pot in centimetres.
- Measure the height of the pot.
- Select the pot shape.
- Click Calculate to see the soil volume and number of bags.
Anwendungsfälle
- •Buying the right amount of potting mix for new containers.
- •Estimating soil for a raised garden bed.
- •Planning bulk soil purchases for a garden project.
- •Avoiding buying too much or too little potting mix.
Formel
Round pot: V = π × r² × h. Square pot: V = side² × h. Volume in litres = cm³ / 1000. Bags = ceil(V / 20).
Häufig gestellte Fragen
How many bags of soil do I need?
Divide the total volume in litres by the bag size (typically 20 L). The calculator rounds up to whole bags.
Should I fill the pot completely?
Leave 2–3 cm from the top to prevent soil washing out when watering.
Is it free?
Yes, all calculators on OhMyCalc are completely free.