Area Unit Converter

Formula or method

Output = input × source area factor ÷ destination area factor. Square the linear scale: 1 ft² = 144 in² = 0.09290304 m². One hectare is 10,000 m²; this tool uses the international-foot acre of 4,046.8564224 m².

How to use this calculator

1. Enter the Value to convert. The interface starts with 1; replace it with your measurement or quantity. Blank, nonnumeric and out-of-range values cannot produce a result.
2. Select From unit for the source unit. Match the complete label, including square/cubic units, decimal/binary prefixes or the gallon system when applicable.
3. Select To unit for the destination unit, then read Converted value with its unit label.
4. Try the worked example with its stated source and destination units. Results show at most eight fractional digits; very small nonzero values use scientific notation. Check the page limitations before interpreting the output.

Worked example

Select square foot (ft²) → square meter (m²), then enter 250. The calculation is 250 × 0.09290304 = 23.22576 m². Separately, 1 ft² → in² gives 144, not 12.

Understanding the result

Read the result as the same area in another unit. For example, the 250 ft² floor area remains unchanged when written as 23.22576 m². Squared unit labels matter.

Limitations and assumptions

• Use a nonnegative area. Dimensions and shape are not inputs; measure or calculate the area first.
• Acres use the international foot, not the retired US survey foot. This is not a boundary survey or a materials/waste estimator.

Frequently asked questions

Sources

• NIST SP 811: quantity-specific conversion factors
• NIST SP 330: non-SI units accepted with the SI