Area Unit Converter
Professional area unit converter supporting metric, imperial and Chinese units with precise conversion
Metric units
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How to use the Area Unit Converter
This tool converts between multiple area units in metric, imperial and traditional Chinese systems. All calculations run entirely in your browser; no data is sent to any server.
- Type a value into any area unit input (decimals are supported). The value is interpreted as the area in that unit.
- Once you finish input, all other unit inputs will be updated with converted results in real time.
- Inputs must be numbers greater than 0. When the input is empty or invalid, other fields are cleared to avoid confusion.
- Supported metric units: square kilometer, square meter, square centimeter, square millimeter, hectare.
- Supported imperial units: square mile, square foot, square inch, acre, square yard.
- Supported Chinese units: qing, mu, square zhang, square chi and other common area units.
- Displayed numbers are formatted automatically (normal decimals or scientific notation) to balance precision and readability.
FAQ
Why are some results shown in scientific notation?
Very large or very small area values are displayed in scientific notation to keep enough significant digits while remaining readable. This matches the behavior of the original HTML tool.
Can I enter 0 or negative numbers?
No. The converter only works with positive area values. Zero or negative inputs are treated as invalid and will clear other results.
Will there be rounding errors in the results?
Results are rounded or formatted for display, which may introduce small visible differences. If you need higher precision, you can re-calculate locally based on the same conversion factors.
Is my data uploaded anywhere?
No. All conversions run locally in your browser. Your input values are never uploaded, making this tool safe for sensitive or real-world business data.