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.

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.