Online Area Unit Converter
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About the Online Area Unit Converter
Tool Introduction
This tool supports real-time conversion between 25 common area units from the metric system, traditional Chinese shizhi, British/US systems, and astronomical units. Whether converting property area (square meter ↔ square foot), calculating land area (mu ↔ hectare), measuring engineering drawings (square inch ↔ square centimeter), or computing astronomical scales (square light-year ↔ square kilometer), enter a value to get an accurate result immediately.
Metric units (International System of Units)
Square millimeter (mm²), square centimeter (cm²), square decimeter (dm²), square meter (m²), square kilometer (km²), hectare (ha). Area units are the square of length units. 1 hectare = 10000 square meters = 0.01 square kilometers. The square meter is the international standard base unit of area, widely used in construction, land, and real estate.
Traditional Chinese shizhi units
Square shili, square shizhang, square shichi, square shicun, mu, fen, li. Traditional Chinese land area uses "mu" as the core unit: 1 mu = 60 square zhang = 666.6667 square meters ≈ 2000/3 square meters, and 1 hectare = 15 mu. Below mu are fen (1/10 mu) and li (1/100 mu), often used in rural land registration and agricultural planning.
British/US units
Square inch (in²), square foot (ft²), square yard (yd²), square rod (rod²), square chain (chain²), acre, square furlong (furlong²), square mile (mi²). Acre is a common land area unit in the UK and US: 1 acre = 43560 square feet = 4046.856 square meters ≈ 6.07 mu. 1 square mile = 640 acres.
Astronomical units
Square astronomical unit (AU²): 1 AU² ≈ 2.238×10²² square meters, used to describe cross-sectional areas within the solar system. Square light-year (ly²): 1 ly² ≈ 8.9505×10³¹ square meters, used to describe area scales of macroscopic cosmic structures such as galaxies and nebulae.
Privacy and Security
All conversion logic is performed locally in your browser; no values are uploaded to a server. You can use it with confidence, without worrying about data leaks.
Tips
1. After entering any value, all units are automatically converted in real time; 2. Click the circular button in the middle to swap the source and target units with one click; 3. The common conversions section provides typical scenarios for one-click switching; 4. The reference table is grouped by unit type for quick location; 5. Scientific notation such as 1e6 for one million is supported.