A practical planning tool
How much potting mix?
Add the containers you plan to fill. Use inside measurements at your intended fill level, and keep each estimate together in one small plan.
1. Add your containers
2. Your mix estimate
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Add your first container to see an estimate.
Start with a single pot, or add a few different shapes. You can edit each container without rebuilding the plan.
Plan stays in this browser unless you choose to print it.
What this estimate assumes
An empty container filled to your measured line, with the selected shape. No allowance is added for settling, waste, roots or occupied space. This is approximate—not a guarantee of the amount you will use.
Not a crop-size recommendation, watering instruction or structural-load calculation.
See the formulas and unitsEstimate based on entered inside dimensions/capacity and fill level. Shape, settling and occupied volume may change actual needs. No extra buffer. US liquid gallons only. Not crop suitability or load advice.
Measure once.
Adjust when you need to.
A bag count is rounded up to a whole bag using the full calculated volume. Displayed totals are rounded only for reading. The tool adds no shopping links and no automatic “just in case” percentage.
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