Square foot (ft²)

Definition

Exactly 0.09290304 m² (0.3048 m squared), by the 1959 agreement.

History

The square foot is the area of a square one foot on each side, tied to the international foot fixed in 1959. It equals exactly 0.09290304 square meters.

Where it is used

Square feet are the standard measure for real estate, flooring and carpet in the United States.

Typical uses include US real estate, flooring and carpet.

Conversion pages

These pages convert square foot to or from another unit in area.

• Square foot to square meter
• Square foot to acre

Other Area units

• Square meter (m²)
• Square inch (in²)
• Square centimeter (cm²)
• Square kilometer (km²)
• Square mile (mi²)
• Acre (ac)
• Hectare (ha)
• Square yard (yd²)

Sources

• NIST HB 44 NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement · Dataset reviewed Nov 11, 2026