Cubic Feet Calculator

Enter nonnegative length, width, and height in feet.

$\text{ft}^3=\text{length}\times\text{width}\times\text{height}$

Because 1 ft = exactly 0.3048 m, 1 ft³ = 0.3048³ = 0.028316846592 m³ = 28.316846592 L. Because 1 ft³ is 1,728 in³ and one U.S. liquid gallon is 231 in³, 1 ft³ = 1,728 ÷ 231 = 7.480519480519… US gal.

A 4 ft × 4 ft × 4 ft box is 64 ft³, 1.812278181888 m³, about 478.753247 US gal, and 1,812.278181888 L. The form rejects dimensions whose products or converted equivalents are invalid numeric results.

Turn the result into other units with the cubic feet to U.S. gallons converter or the cubic feet to cubic meters converter, or compute a metric volume directly with the cubic meter calculator.

Sources

• NIST, Guide for the Use of the International System of Units (SP 811) — SI units and accepted conversion guidance.
• NIST, Handbook 44, Appendix C — U.S. customary volume and length relationships used for dimensional arithmetic.