Backyard Numbers makes free calculators for home landscaping and driveway projects: gravel, asphalt, mulch, topsoil, sand, pavers and retaining walls.
Every calculator runs in your browser. There's nothing to sign up for, and we don't store the numbers you enter.
How we build our calculators
Each calculator shows its formula and the material weights it uses, so you can check the math yourself. Weights come from typical industry figures for each material. Real materials vary by supplier, moisture and compaction, so treat results as a planning estimate and confirm with your supplier before ordering.
Found a mistake?
If a number looks wrong or you'd like a calculator we don't have yet, get in touch.