Topsoil Calculator
Use your own numbers after reviewing the formula and worked example.
Quick answer
Topsoil volume equals surface area times depth after converting the depth to feet.
Formula or method
Keep units, percentages and time periods consistent. The formula is useful as a transparent check on the calculator result and helps explain why changing one input changes the answer.
Step-by-step
- Find area in square feet.
- Choose desired depth.
- Convert inches to feet.
- Calculate cubic feet and divide by 27.
Worked example
A 1,000-sq-ft area with 2 inches of topsoil needs about 166.7 cubic feet, or 6.17 cubic yards.
How to interpret the result
Soil can settle, and weight per yard varies with moisture and composition.
When the answer is used for a purchase, loan, payroll decision, construction order, school grade, health estimate or other real-world choice, verify the assumptions that matter in that context. Accurate arithmetic still depends on accurate inputs.
Common mistakes
- Confusing 2 inches with 2 feet.
- Ignoring settling.
- Using a generic weight conversion for all soil.
Frequently asked questions
How do I handle irregular areas?
Break them into simple shapes.
Can topsoil be ordered by weight?
Yes, but volume-to-weight conversion varies.
Is 2 inches always correct?
No; depth depends on the project.