Potting Soil Calculator
Estimate potting-mix volume for multiple containers using their measured inside dimensions.
Results
Potting mix
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Bags
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Use the result as a planning estimate and verify project-specific measurements, product information and site conditions where relevant.
How it works
The calculator finds one container volume, multiplies by quantity, and adds the selected extra percentage.
total mix = container volume × quantity × (1 + extra %)Worked example
Four tapered pots about 12 in across, 9 in at the base and 10 in deep require only a few cubic feet of mix.
Assumptions
- Measurements represent usable inside dimensions.
Limitations
- Nursery trade sizes do not always equal physical volume; tapered or irregular pots are approximations.