Planter Soil Calculator
Enter your size to get planter soil quantity, plus an estimated cost. Waste is included and prices are editable.
Material needed
Estimated cost
How to calculate planter soil
Planter soil. Enter planter length, width and depth to get cubic yards.
Formula: volume = length × width × (thickness ÷ 12) ÷ 27 = 1.23 cubic yards. With 10% waste: 1.36 cubic yards.
Worked example
Example: 10 ft × 10 ft at 4 inches thick = 1.23 cubic yards. With 10% waste: 1.36 cubic yards, about $54 at $40 per cubic yard.
Tips
Measure the full area, then subtract large openings if you want an exact count. Order a little extra for cuts and breakage, and confirm quantities with your supplier before you buy.
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Frequently asked questions
How much planter soil do I need?
Example: 10 ft × 10 ft at 4 inches thick = 1.23 cubic yards. With 10% waste: 1.36 cubic yards, about $54 at $40 per cubic yard.
How much waste should I add?
Add 10% for straight areas and 15% for areas with many cuts, corners and openings.
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.