Gravel calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Volume = length × width × depth = 66.67 cubic feet = 2.47 cubic yards.
- Weight per cubic yard differs by stone type and moisture (about 1.2 to 1.5 tons is common); ask your supplier.
| Inputs | Answer |
|---|---|
| Units: Feet, depth in inches; Length: 20; Width: 10; Depth: 4; Weight of the material: 1.4 | You need about 2.47 cubic yards of gravel, roughly 3.46 tons at 1.4 tons per cubic yard. |
| Units: Feet, depth in inches; Length: 50; Width: 12; Depth: 6; Weight of the material: 1.4 | You need about 11.11 cubic yards of gravel, roughly 15.56 tons at 1.4 tons per cubic yard. |
| Units: Metres, depth in cm; Length: 10; Width: 3; Depth: 10; Weight of the material: 1.4 | You need about 3.92 cubic yards of gravel, roughly 5.49 tons at 1.4 tons per cubic yard. |
How to use it
Gravel volume is length × width × depth, converted to cubic yards. Suppliers usually sell by the ton, so the calculator multiplies by the weight per cubic yard you enter; about 1.2 to 1.5 tons per cubic yard is common, but it varies with stone type and moisture, so ask your supplier.
A 20 × 10 foot area 4 inches deep is 66.7 cubic feet, about 2.47 cubic yards, or around 3.5 tons at 1.4 tons per cubic yard.
Frequently asked questions
How much gravel do I need?
Length × width × depth, converted to cubic yards.
How many tons is a cubic yard of gravel?
Often 1.2 to 1.5 tons depending on the stone.
What depth for a driveway?
Ask your supplier; many drives use several inches in layers.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.