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Gravel Driveway Calculator

Find how many cubic yards and tons of gravel a driveway needs, by layer or in one go, with the cost.

Change the values and press Calculate to work out your own figures.

Length, width and depth

Enter the area's length and width and the depth.

Size of this dimension.
Size of this dimension.
Size of this dimension.
Its typical density is used unless you enter your own below.
Unit of your density.
What your price is for.
From your supplier; overrides the material's typical value.
For waste, cuts or compaction; for example 10.
For a bag count.
Price per result unit, for an estimate; prices vary, so use your supplier's.
Result
Material
10.33 tons
Volume
6.67 cu yd (180 cu ft, 5.1 m³)
Weight
20,667 lb (9.37 metric tonnes)
Density used
1.55 tons per cu yd (typical; published range 1.4–1.7). Check with your supplier.

You need about 6.67 cubic yards, weighing about 10.33 tons.

Show the working
  1. cubic yards = area × depth ÷ 27 (in feet)
  2. tons = 6.6667 cu yd × 1.55 tons per cu yd

Area and depth

Enter the area and the depth.

The area to fill.
Size of this dimension.
Its typical density is used unless you enter your own below.
Unit of your density.
What your price is for.
From your supplier; overrides the material's typical value.
For waste, cuts or compaction; for example 10.
For a bag count.
Price per result unit, for an estimate; prices vary, so use your supplier's.
Result
Material
22.96 tons
Volume
14.81 cu yd (400 cu ft, 11.33 m³)
Weight
45,926 lb (20.83 metric tonnes)
Density used
1.55 tons per cu yd (typical; published range 1.4–1.7). Check with your supplier.

You need about 14.81 cubic yards, weighing about 22.96 tons.

Show the working
  1. cubic yards = area × depth ÷ 27 (in feet)
  2. tons = 14.8148 cu yd × 1.55 tons per cu yd

How to use it

Enter the area's length and width and the depth. Enter the area and the depth.

Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.

Key facts

cubic yards = length × width × depth ÷ 27 (in feet)
tons = cubic yards × tons per cubic yard

Layers

A durable gravel drive is often built in three layers of about 4–6 in: large stone (#3) at the bottom, #57 in the middle and a finer top. Work out each layer on its own.

Questions

How much gravel for a 30 × 12 ft driveway, 6 in deep?

6.67 cubic yards, about 10.33 tons at 1.55 t/yd³.

Reviewed by RK Calculator Team. Updated 2026-09-26.

Formulas

cubic yards = length × width × depth ÷ 27 (in feet)
tons = cubic yards × tons per cubic yard

Sources

Limitations

  • Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
  • Tank results are the geometric volume; real tanks have wall thickness and fittings.

Formula version 0.1.0Reviewed