Online Length Unit Converter
Meter / Centimeter / Foot / Inch / Kilometer
Common Conversions
About Length Unit Conversion
Enter a length value and choose source and target units to convert across metric, imperial, nautical and traditional Chinese length units. You can also use the Area Unit Converter to convert square meters, mu and hectares.
Common Formulas
- 1 m = 100 cm = 1000 mm
- 1 inch = 2.54 cm
- 1 foot = 0.3048 m
- 1 mile = 1.609344 km
Use Cases
- Home renovation, furniture and screen-size conversions
- Metric, imperial and traditional Chinese unit conversions in engineering drawings
- Distance conversions for driving, running and maritime/nautical use
Tips
- Inches and feet are imperial units; keep enough decimal places when converting to/from metric.
- Traditional units like chi, cun and zhang may vary by historical context; this tool uses common market-system approximations.
FAQ
Which length units does the converter support?
It supports common length units including kilometer (km), meter (m), decimeter (dm), centimeter (cm), millimeter (mm), micrometer (μm), nanometer (nm), mile (mi), yard (yd), foot (ft), inch (in), nautical mile (nmi), and traditional Chinese li, zhang, chi and cun — covering metric, imperial and Chinese units.
How many centimeters is 1 inch?
1 inch = 2.54 cm. This international standard is widely used for screen sizes and (imperial) body height. Enter "1" and choose inch → centimeter to get the result.
How to convert kilometers and miles?
1 mile = 1.609344 km, and 1 km ≈ 0.621 miles. Miles are mainly used in the US and UK, while kilometers are the international standard; both are common for driving distance and running mileage.
Can I copy the conversion result?
Yes. Click the main result or a common-result item to copy it, handy for documents, spreadsheets or notes. For other units, try the area converter or weight converter.