Pot Soil Volume Calculator
Fill in the values and the answer updates as you type.
How the Pot Soil Volume Calculator 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.
Inputs and results
The Pot Soil Volume Calculator takes 5 inputs and gives 3 results.
What you enter
- Pot diameter (cm) — starts at 30.
- Pot height (cm) — starts at 25.
- Fill level (%) — starts at 90.
- Number of pots — starts at 5.
- Bag size (L) — starts at 40.
What you get
- Soil per pot (litres)
- Total soil (litres)
- Bags needed
Example: Pot Soil Volume Calculator with the starting values
With pot diameter 30 cm, pot height 25 cm, fill level 90 %, number of pots 5 and bag size 40 L, the calculator returns:
| Soil per pot (litres) | 15.9 |
|---|---|
| Total soil (litres) | 79.5 |
| Bags needed | 2 |
Change any value above and the results update straight away.
Pot Soil Volume Calculator FAQ
How do I use the Pot Soil Volume Calculator?
Enter pot diameter, pot height, fill level and number of pots in the fields, then read soil per pot (litres), total soil (litres) and bags needed in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Pot Soil Volume Calculator calculate?
Potting mix needed to fill round planters and containers. It returns soil per pot (litres), total soil (litres) and bags needed from the 5 values you provide.
What values does the Pot Soil Volume Calculator start with?
It opens with pot diameter 30 cm, pot height 25 cm, fill level 90 % and number of pots 5 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Pot Soil Volume Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Pot Soil Volume Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.