Cubic Yards Calculator
Convert any volume between cubic feet, cubic yards, cubic inches, cubic meters and gallons — or calculate it from length, width and height.
A box 2 ft × 3 ft × 4 ft is 24 cubic feet, or 0.89 cubic yards.
How to Use This Cubic Yards Calculator
- Enter length, width and height in feet to calculate the volume directly.
- Or switch to converter mode to translate between cubic feet, yards, inches, meters and gallons.
- Use the area + depth mode for a flat area (like a slab or garden bed) covered to a depth in inches.
The Formulas
Volume = length × width × height. One cubic yard = 27 cubic feet; one cubic foot = 1,728 cubic inches; one cubic meter = 35.315 cubic feet; one US gallon = 231 cubic inches.
V = L × W × H Volume in cubic feet 1 yd³ = 27 ft³ Cubic yards (the unit for concrete, soil, mulch) 1 ft³ = 1,728 in³ Cubic inches 1 m³ = 35.315 ft³ · 1 gal = 231 in³ Metric and US gallon Worked Example: 2×3×4 Box
A box that is 2 ft × 3 ft × 4 ft: V = 24 cubic feet. In cubic yards: 24 ÷ 27 = 0.89. In gallons: 24 × 7.48 = 179.5 US gallons.
Key Volume Conversions
| Unit | Equals |
|---|---|
| 1 cubic yard | 27 cubic feet |
| 1 cubic yard | 46,656 cubic inches |
| 1 cubic yard | 0.765 cubic meters |
| 1 cubic yard | 202 US gallons |
| 1 cubic foot | 7.48 US gallons |
| 1 cubic meter | 35.315 cubic feet |
US gallons.
When You Order by the Cubic Yard
Ready-mix concrete, topsoil, mulch and gravel are all sold by the cubic yard. One cubic yard of concrete covers a 10×10 ft slab at 4 in thick (1.23 yd³ actually — slightly more than a yard). For a quick mental check: a yard of material is a cube about 3 ft on each side — roughly the size of a washing machine.
Quick Tips
- 27 ft³ per yard — remember this one number and most volume math is easy.
- Multiply square feet by depth (in feet) to get cubic feet, then divide by 27.
- One yard of mulch or gravel covers about 108 sq ft at 3 in deep.
Frequently Asked Questions
How many cubic feet are in a cubic yard?
27 cubic feet (3 ft × 3 ft × 3 ft).
How do I calculate cubic yards?
Multiply length × width × height in feet to get cubic feet, then divide by 27. A 10×10 ft area at 4 in deep is 33.3 ft³ ÷ 27 = 1.23 cubic yards.
How many cubic feet are in a cubic meter?
35.315 cubic feet.
How many gallons are in a cubic yard?
202 US gallons (27 ft³ × 7.48 gallons per ft³).