square foot (ft²)
1 square foot = 0.09290304 square metres
What is square foot?
A square foot is a unit of area in imperial and US customary systems equal to 144 square inches. It is commonly used in the United States for real estate listings, floor plans, and building layouts.
Notes: Imperial/USCS unit
Real-world uses
Square feet are the primary unit for real estate in the United States, Canada, and parts of South Asia. Office space, apartment listings, and retail floor plans are quoted in sq ft. Flooring, tiles, and paint coverage are sold per square foot in these markets.
History
The square foot derives directly from the foot, which has been used since ancient times. It became the de facto real estate standard in the United States and remains deeply entrenched in American property markets despite the global shift toward metric units.
Common mistakes
Forgetting that square footage is an area measure, not a length. A 1,000 sq ft apartment is not 1,000 feet long. Also, nominal tile sizes often include grout spacing, so actual coverage per tile is slightly less than the stated size.
When is this conversion used?
Converting between square foot and square metre is common when working across metric and imperial systems, such as international trade, travel between countries with different measurement standards, or following instructions from a different region.
How to convert square foot to square metre
To convert square foot to square metre, multiply the value by 0.09290304.
Conversion formula (from base unit)
x * 0.09290304
Measurement standards
The square metre is the SI derived unit of area. The hectare (10,000 m²) is accepted for use with the SI by the BIPM, particularly for land measurement, though it is not an SI unit itself.
Did you know?
Vatican City, the world's smallest independent state, covers just 0.44 km² (about 109 acres) — smaller than many golf courses. By contrast, Russia spans over 17.1 million km², nearly 39 million times larger.
| square feet | square metres |
|---|---|
| 0.1 | 0.0092903 |
| 0.5 | 0.04645152 |
| 1 | 0.09290304 |
| 2 | 0.18580608 |
| 5 | 0.4645152 |
| 10 | 0.9290304 |
| 25 | 2.322576 |
| 50 | 4.645152 |
| 100 | 9.290304 |
| 250 | 23.22576 |
| 500 | 46.45152 |
| 1,000 | 92.90304 |
Common values
| square feet | square metres | |
|---|---|---|
| A4 paper | 0.66736245 square feet | 0.062 square metres |
| Parking space | 134.54888021 square feet | 12.5 square metres |
| Tennis court | 2,807.98131041 square feet | 260.87 square metres |
| Football field (soccer) | 76,854.32037531 square feet | 7,140 square metres |
| Central Park, NYC | 36,704,934.52098015 square feet | 3,410,000 square metres |
Full square foot conversion table
| Unit | Value | Factor |
|---|---|---|
| square metre | 1 ft² = 0.09290304 m² | × 0.09290304 |
| square kilometre | 1 ft² = 9.290304e-08 km² | × 9.290304e-08 |
| square mile | 1 ft² = 3.587006e-08 mi² | × 3.587006e-08 |
| acre | 1 ft² = 0.00002296 ac | × 0.00002296 |
| hectare | 1 ft² = 0.00000929 ha | × 0.00000929 |
| square centimetre | 1 ft² = 929.0304 cm² | × 929.0304 |
| square inch | 1 ft² = 144 in² | × 144 |
| square yard | 1 ft² = 0.11111111 yd² | × 0.11111111 |
| are | 1 ft² = 0.00092903 a | × 0.00092903 |