Length Converter
Convert between metric, imperial, nautical, and astronomical length units
Common Conversions
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Unit Information
📏 Metric System
The metric system uses base-10 prefixes. Common units include millimeter (mm), centimeter (cm), meter (m), and kilometer (km).
📐 Imperial System
Used mainly in the US, imperial units include inch (in), foot (ft), yard (yd), and mile (mi). These units have historical origins.
⚓ Nautical Units
Nautical mile (nmi) is used in maritime and aviation. One nautical mile equals approximately 1.852 kilometers.
🌌 Astronomy
Light-year (ly) and Astronomical Unit (AU) measure vast cosmic distances. 1 AU = Earth-Sun distance.
🔄 How It Works
This converter uses standardized conversion factors based on international standards. All conversions are precise and accurate.
💡 Tip
Use decimal numbers for precise conversions. Press Enter to convert quickly, or use the Convert button.