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Area Conversion
Tool Description
Area Conversion is an online area unit conversion tool that supports mutual conversion between metric (mm²/cm²/m²/km²/hectare/are), Chinese market units (square chi/square zhang/mu/fen/li), and imperial (in²/ft²/yd²/acre/mi²). Enter any value and unit to instantly view the corresponding results in all other units. Suitable for house measurement, land area calculation, construction and renovation, agricultural planning, international trade, and more.
How to Use
- Enter a value: Type the value you want to convert in the input field, supporting integers and decimals, e.g.,
100,0.5 - Select source unit: Choose the area unit of your value from the dropdown (mm²/cm²/m²/km²/ha/a/chi²/zhang²/mu/fen/li/in²/ft²/yd²/ac/mi²)
- View results: Click the "Convert" button or press Enter, and the result area below will display the corresponding values in all units. Each result has a copy button for convenience.
Use Cases
- House Measurement: Convert between square meters and square feet for property area; 1 m² ≈ 10.764 ft², making it easy to compare domestic and international housing sizes
- Land Calculation: Convert farmland area between mu, hectare, and acre; 1 hectare = 15 mu, 1 acre ≈ 6.07 mu
- Renovation Planning: Quickly calculate floor and tile areas in square centimeters, square meters, and square feet for room renovations
Core Advantages
- Free to Use
Completely free. Simply open the page to use it — no software installation, no registration or login required.
- Private & Secure
All conversions run entirely in your browser. Your input data is never uploaded to any server, protecting your privacy.
- Comprehensive Units
Supports mutual conversion among metric, Chinese customary and imperial area units, covering everything from square millimeters to square kilometers, and mu to acres.
- Instant Conversion
Results are calculated in real time as you type, with high precision and support for both integers and decimals — no manual click needed to see all unit results.
- Simple & Easy
The interface is clean and intuitive, with no learning curve. Works smoothly on both desktop and mobile for area conversion anytime, anywhere.
Metric Area Unit Conversion
The following table shows the conversion relationships between metric area units, using square meter (m²) as the base unit:
| Unit Name | Abbr. | Conversion Relationship | Equivalent m² |
|---|---|---|---|
| Square Millimeter | mm² | 1 mm² = 0.01 cm² | 0.000001 |
| Square Centimeter | cm² | 1 cm² = 100 mm² | 0.0001 |
| Square Meter | m² | 1 m² = 10,000 cm² | 1 |
| Are | a | 1 a = 100 m² | 100 |
| Hectare | ha | 1 ha = 10,000 m² | 10,000 |
| Square Kilometer | km² | 1 km² = 1,000,000 m² | 1,000,000 |
Chinese Market & Imperial Unit Conversion
The following table shows the conversion relationships for Chinese market units and imperial/US area units, using square meter (m²) as the base unit:
| Unit Name | Abbr. | Conversion Relationship | Equivalent m² |
|---|---|---|---|
| Square Chi | - | 1 平方尺 = 1/9 m² | 0.111111 |
| Square Zhang | - | 1 平方丈 = 100 平方尺 | 11.1111 |
| Mu | - | 1 亩 = 60 平方丈 | 666.667 |
| Fen | - | 1 分 = 0.1 亩 | 66.6667 |
| Li | - | 1 厘 = 0.01 亩 | 6.66667 |
| Square Inch | in² | 1 in² = 6.4516 cm² | 0.00064516 |
| Square Foot | ft² | 1 ft² = 144 in² | 0.09290304 |
| Square Yard | yd² | 1 yd² = 9 ft² | 0.83612736 |
| Acre | ac | 1 ac = 4,840 yd² | 4,046.8564224 |
| Square Mile | mi² | 1 mi² = 640 ac | 2,589,988.110336 |
Mu, Hectare & Acre Conversion
Mu is a traditional Chinese land area unit. 1 mu = 60 square zhang ≈ 666.667 m². 1 hectare (ha) = 15 mu. It is a legally recognized auxiliary unit of area in China, widely used in agriculture, forestry, and land management.
Acre is a commonly used land area unit in the UK and US. 1 acre = 4,840 square yards ≈ 4,046.856 m² ≈ 6.07 mu. In the United States, farm size and real estate area are typically measured in acres. 1 square mile (mi²) = 640 acres. When reading foreign land data, note the difference between mu and acre — they differ by a factor of approximately 6.
FAQ
1 mu ≈ 666.667 square meters (m²), i.e., 1 mu = 60 square zhang. Also, 1 hectare (ha) = 10,000 m² = 15 mu. In China, mu is the legally recognized land area unit. 1 km² = 100 ha = 1,500 mu. The common saying "one mu and three fen of land" is about 867 m². Note that some northeastern regions in China use a "large mu" (1 large mu = 1,000 m²), which differs from the standard mu (666.667 m²) used by this tool.
1 square meter (m²) ≈ 10.764 square feet (ft²). Conversely, 1 ft² ≈ 0.0929 m². When viewing overseas property listings, use this ratio for quick conversion. For example, a 1,000 ft² apartment ≈ 92.9 m², and a 100 m² home ≈ 1,076 ft².
1 acre (ac) ≈ 6.07 mu, i.e., 1 acre ≈ 4,046.856 m². The acre is the most commonly used land area unit in the UK and US; 1 square mile = 640 acres. In Chinese agriculture, mu is the standard unit. When reading foreign agricultural data, be careful to distinguish between them. For example, a typical US family farm is about 444 acres ≈ 2,695 mu.
1 square zhang = 100 square chi, 1 mu = 60 square zhang = 6,000 square chi. Converted to metric: 1 square chi = 1/9 m² ≈ 0.111 m², 1 square zhang ≈ 11.11 m², 1 mu ≈ 666.67 m². This is the traditional Chinese area measurement system, still used in urban real estate and rural land contexts.
No. All conversion calculations run entirely in your browser using pure JavaScript math. Your input data never leaves your device.
This tool uses JavaScript double-precision floating-point numbers (64-bit IEEE 754) for calculations, which is sufficiently accurate for the vast majority of everyday scenarios. All unit conversions use standard ratios (e.g., 1 ft = 0.3048 m, so 1 ft² = 0.09290304 m²). Decimal portions are capped at 6 significant decimal places, and excessively long decimals are automatically truncated. For extremely large or small values, there may be minor errors due to floating-point precision limitations, but this has virtually no practical impact.
This tool supports many metric, Chinese customary and imperial units: square millimeter, square centimeter, square meter, are, hectare, square kilometer, square chi, square zhang, mu, fen, li, square inch, square foot, square yard, acre, square mile, etc. Enter any unit to convert it into all the others at once.
There is no fixed upper limit on the value. It handles most everyday integers and decimals. Subject to the browser's double-precision limit, extremely large or small values may show tiny precision errors with virtually no practical impact.
Instant. All calculations run locally in your browser in real time, displaying all results with almost zero delay and without waiting for network requests.
Completely free, no registration needed. You can use all features directly by opening the page — no fees, no login.
Yes. The page is responsive and works properly on phones, tablets and desktops, with smooth conversion in mobile browsers as well.
Local computation is safer and lighter. Compared with desktop software that requires file uploads, this tool needs no installation and is ready to use instantly; compared with some online tools, all calculations are done locally and data is never uploaded, balancing speed and privacy.
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