Input Length
Enter a value and select a unit to convert from.
Converted Results
Metric System
Imperial System
Traditional Korean
* Korean traditional units are based on the modern definition (1 Ri ≈ 393m).
Length Converter
Instantly convert between Metric (m, cm), Imperial (inch, ft, yd), and traditional Korean length units. Accurate and easy-to-use length converter.
About Length Converter
Length Converter is a free, browser-based tool that converts a length value between metric, imperial, and traditional Korean units at once. It runs entirely in your browser, so the numbers you enter never leave your device.
Enter one value, pick its source unit, and the tool instantly shows the equivalent in every supported unit: millimeter, centimeter, meter, and kilometer; inch, foot, yard, and mile; and the Korean units ja, gan, jeong, and ri. It is useful for converting between metric and imperial measurements or for working with older Korean documents that use traditional units.
All results update live as you type, and you can click any result to make that unit the new source. The conversions are plain arithmetic based on fixed factors with the meter as the base unit, so there is no rounding back-and-forth between steps.
Korean traditional units follow the modern definition (1 ja = 10/33 m, with 1 ri about 393 m), which may differ slightly from historical regional usage. Very large or small results are shown in scientific notation, and figures are rounded for display, so treat them as practical conversions rather than survey-grade precision.
Frequently asked questions
- Which length units does it support?
- Metric (mm, cm, m, km), imperial and US units (inch, foot, yard, mile), and Korean traditional units (ja, gan, jeong, ri), all converted at the same time.
- How are the Korean traditional units defined?
- They use the modern metric definition, where 1 ja equals 10/33 of a meter and 1 ri is about 393 meters. Historical regional values may have differed slightly.
- Does it send my input anywhere?
- No. All conversion happens in your browser using fixed mathematical factors, with no server requests, so your entered values stay on your device.