What is the Area Converter?
Convert any area unit to all others at once — cm², m², km², ft², ac, ha, mi². Area units range from square millimeters to acres and hectares, and this converter shows every unit at once from a single input.
How to use the Area Converter
- Enter your value, your from unit.
- Results update automatically as you type; you can also press Calculate.
- Read the output: square centimeter (cm²), square meter (m²), square kilometer (km²), square foot (ft²).
- Check the chart to see how the conversion scales.
Formula and method
Worked example
With value = 1, from unit = Square Centimeter (cm²), the Area Converter returns square centimeter (cm²): 1 cm²; square meter (m²): 0.0001 m²; square kilometer (km²): 1e-10 km².
When an all-in-one area converter helps
You are comparing farmland listed in hectares with a property listed in acres. Entering one value shows both, plus square feet and square meters.
An architect receives a site plan in square feet but needs square meters for a planning application. Converting once gives every related unit.
Watch out for these mix-ups
- Using a length factor for area, such as 3.28 instead of 10.76.
- Confusing acres with hectares.
- Mixing gross and net land area.
- Rounding large land areas early.
Tips for better results
- Remember area factors are the square of length factors.
- Note whether figures include roads and easements.
- Keep decimals for legal or planning documents.
💡 Practical tip: One hectare is about 2.47 acres, or exactly 10,000 square meters.
Frequently asked questions
What does the Area Converter do?
Convert any area unit to all others at once — cm², m², km², ft², ac, ha, mi².
How is it calculated?
The Area Converter uses this method: value in target = value × (factor of source ÷ factor of target).
Can you show an example?
With value = 1, from unit = Square Centimeter (cm²), the Area Converter returns square centimeter (cm²): 1 cm²; square meter (m²): 0.0001 m²; square kilometer (km²): 1e-10 km².
Is the Area Converter accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Area Converter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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