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What the Square Feet Converter does
Square Feet Converter: 1 ft² = 0.09290304 m², so multiply a square foot value by 0.09290304 to get square metre, or divide to go back. Example: 1 ft² = 0.09290304 m².
This converter reads Value, From and To and produces Result, How it was calculated and Reverse conversion. Change any input and the output follows immediately.
Unit mistakes are quietly expensive. They have wrecked spacecraft and ruined recipes alike. That is usually what brings students converting units for homework here.
The work is done by JavaScript already loaded in your browser, so your input never crosses the network.
Each field is explained further down, along with the method and a worked example that uses the default values.
What do the Square Feet Converter fields mean?
The Square Feet Converter uses 3 inputs. Because the form arrives filled, the first useful result costs you zero typing.
| Field | What to enter | Default |
|---|---|---|
| Value | required | 1 |
| From | choose from Square millimetre (mm²), Square centimetre (cm²), Square metre (m²), Hectare (ha), Square kilometre (km²) or Square inch (in²) | Square foot (ft²) |
| To | choose from Square millimetre (mm²), Square centimetre (cm²), Square metre (m²), Hectare (ha), Square kilometre (km²) or Square inch (in²) | Square metre (m²) |
How does the Square Feet Converter work?
Both units are converted through area's base unit (m²), so any of the 16 units in the dropdowns can be paired in either direction without loss of accuracy.
Every factor here is the defined one, not a textbook approximation. That matters more than it sounds: rounding a factor early is the usual reason two converters disagree in the fourth decimal place.
Worked example
These are the values the Square Feet Converter loads by default, and the result it produces from them. Open the tool above and you will find precisely these figures already in place.
| Value | 1 |
|---|---|
| From | Square foot (ft²) |
| To | Square metre (m²) |
| Result | 0.09290304 m² |
|---|---|
| How it was calculated | 1 ft² = 0.09290304 m², so 1 × 0.09290304 = 0.09290304 m² |
| Reverse conversion | 10.76391042 ft² (if you meant 1 m²) |
Square feet and square metres
1 square foot equals exactly 0.09290304 square metres, and 1 square metre equals about 10.7639 square feet. An area conversion is always the linear factor squared, which is why the numbers look larger than the familiar 3.28 feet-per-metre figure.
Worth knowing
- US and Canadian real estate is measured in square feet almost universally, while most of the rest of the world uses square metres: this is one of the most frequently needed conversions for anyone comparing international property listings.
- A quick sanity check: a 10 ft × 10 ft room (100 ft²) converts to about 9.3 m², noticeably less than the naive "10 ft ≈ 3 m, so 100 ft² ≈ 9 m²" mental shortcut might suggest, since both linear dimensions were rounded before squaring, compounding the error.
- Carpet, flooring and paint are often priced per square foot in the US and per square metre elsewhere. This conversion is directly useful for comparing material costs across those markets.
Definitions: BIPM SI Brochure · NIST reference on units
How to use it
- Set Value.
- Pick a value for From: the options are Square millimetre (mm²), Square centimetre (cm²), Square metre (m²), Hectare (ha), Square kilometre (km²) or Square inch (in²).
- Pick a value for To: the options are Square millimetre (mm²), Square centimetre (cm²), Square metre (m²), Hectare (ha), Square kilometre (km²) or Square inch (in²).
- Because there is no round trip to a server, updating on every keystroke costs nothing.
- Check Result, How it was calculated and Reverse conversion on the right.
- Use Copy Link if you want the same setup again later, or Print for a paper copy.
What this tool does not do
- Factors use the internationally agreed definitions; some industries round them differently.
- Repeated conversions compound rounding, so convert once from the original value where you can.
- Edge cases at the very limits of the accepted range are handled, but rarely worth relying on.
- The result inherits any error in the inputs without flagging it.
Frequently asked questions
Value, From and To, nothing else. Each field is pre-filled with a sensible default, so the quickest approach is to replace the one number you actually care about.
With the values loaded when the page opens, result comes out as 0.09290304 m². Nudge one field at a time to see which one the answer is most sensitive to.
No. Disconnect from the internet and it still works; that is the simplest proof there is no server call.
Free for any use, personal or commercial.
The formula is shown above precisely so you do not have to take the accuracy on trust.