How this calculator works
Calculate how much topsoil is needed to raise, fill or top-dress a rectangular area.
Volume = length × width × depth, converting inches to feet and cubic feet to cubic yards.
Example
A 20 × 10 ft area raised by 4 inches needs about 66.7 cubic feet, or 2.47 cubic yards.
How to get a better estimate
- Loose soil can settle after placement.
- Irregular beds are easier to estimate by splitting them into rectangles.
- Confirm bag volume rather than bag weight.
What the result means
The result is a planning estimate. Dimensions, coverage, density, packaging and installation conditions vary by product and project. For purchasing, compare the result with the exact product label or supplier specification. For structural, electrical, code-regulated or safety-critical work, use an appropriately qualified professional.
Common questions about the Topsoil Calculator
What does this calculator estimate?
Calculate how much topsoil is needed to raise, fill or top-dress a rectangular area.
What formula does it use?
Volume = length × width × depth, converting inches to feet and cubic feet to cubic yards.
How should I use the result?
Use it as a planning estimate, then verify the dimensions and replace editable defaults with the specifications for the product or service you actually intend to buy.
Reference tables
Want a fast benchmark without changing inputs? These static tables use the same published calculation method.