Cubic Yard Calculator

Calculate cubic yards of soil, mulch, gravel, sand or concrete from length, width and depth, with a waste allowance and approximate weight. Example: a 10 by 10 foot area 4 inches deep needs 1.23 cubic yards, or 1.36 with 10% extra.

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Length

feet

Width

feet

Depth

inches

Extra for waste

Material (for weight)

How to use the Cubic Yard Calculator

Enter the length and width in feet and the depth in inches.
Add a waste allowance and pick the material.
Press Calculate for cubic yards, bags and approximate weight.

Formula and method

Cubic yards = length (ft) x width (ft) x depth (in) / 12 / 27. One cubic yard is 27 cubic feet. Add 5% to 10% for settling and waste.

Worked example: 10 x 10 ft, 4 inches deep

Step	Result
Cubic feet (10 x 10 x 4/12)	33.33
Cubic yards (33.33 / 27)	1.235
With 10% extra	1.358

Cubic yards per 100 square feet

Depth	Cubic yards
1 inches	0.31
2 inches	0.62
3 inches	0.93
4 inches	1.23
6 inches	1.85
8 inches	2.47
12 inches	3.70

Approximate weight per cubic yard

Material	Pounds
Topsoil	2,200
Mulch	800
Gravel	2,800
Sand	2,700
Concrete	4,000

Frequently asked questions

How do I calculate cubic yards?

Multiply length by width by depth in feet, then divide by 27.

How many cubic feet are in a cubic yard?

27.

How much mulch do I need?

Cover to 2 to 3 inches deep: 100 sq ft at 3 inches is 0.93 cubic yards.

How much does a cubic yard of gravel weigh?

About 2,800 pounds, roughly 1.4 tons.

How much extra should I order?

5% to 10%.

How many 2 cu ft bags equal a yard?

13.5 bags.

Sources

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Effortless Math Team

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