Turn any area and depth into cubic yards — the unit bulk materials are sold by. Works for gravel, mulch, topsoil, sand and concrete.
| Measure | Amount |
|---|---|
| Cubic yards | |
| Cubic feet | |
| Area | |
| With 10% extra (ordering) |
Suppliers round up — most sell in full or half yards. Coverage cheats: 1 yd³ = 27 cu ft = ~324 sq ft at 1″ deep, ~162 at 2″, ~108 at 3″, ~81 at 4″.
Cubic yards = (length ft × width ft × depth ft) ÷ 27. Depth in inches is converted first (÷ 12). Weight = cubic yards × material density, which varies — the densities here are planning averages; your supplier's per-yard yield is the number that matters at order time.
For estimation only.