Cubic foot (ft³)

Definition

A cube one foot on each side — exactly 28.316846592 liters (0.3048³ m³), about 7.48 US gallons.

History

The cubic foot is the volume of a cube one foot on each side, built from the international foot. It equals about 28.32 liters, or roughly 7.48 US gallons.

Where it is used

Cubic feet measure the capacity of refrigerators and freezers, natural-gas supply and shipping volume in the United States.

Typical uses include appliance capacity, natural gas, shipping.

Conversion pages

These pages convert cubic foot to or from another unit in volume.

• Cubic meter to cubic foot

Other Volume units

• Liter (L)
• Milliliter (mL)
• US gallon (gal)
• US quart (qt)
• US pint (pt)
• US cup (cup)
• US fluid ounce (fl oz)
• Tablespoon (tbsp)
• Teaspoon (tsp)
• Cubic meter (m³)

Sources

• NIST HB 44 NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents) · Dataset reviewed Nov 11, 2026