Length Converter
Convert millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles and Chinese li/chi/cun online. Enter one value to instantly see every unit — ideal for engineering, logistics, travel and everyday measurement.
Length conversion
Length Convert
All units overview
All Units Overview
Length Converter Guide
Metric / Imperial / Chinese
The length converter is one of the foundational tools in FinCompute’s conversion module, covering 13 units across the metric, imperial and Chinese traditional systems. Whether you are an engineer converting millimeters to inches on a drawing, a logistics specialist checking kilometers against miles, a traveler understanding nautical miles, or encountering li, chi and cun in traditional trades, enter any value and instantly see every equivalent unit. All conversion runs locally in your browser with no network access, millisecond response, one-click copy of results and quick swap of source/target units.
Length converter guide
Length is one of the most frequently converted quantities, especially in engineering drawings, cross-border logistics, travel and reading imperial documents. FinCompute’s length converter covers 13 units across metric, imperial and Chinese traditional systems in one screen: type any value and see every equivalent update at once.
Metric: the International System
Metric is based on the meter; millimeters, centimeters, decimeters, meters and kilometers use decimal conversions and form the official measurement system for science, engineering and most countries.
Imperial: inches to nautical miles
Imperial includes inches, feet, yards, miles and nautical miles. 1 foot = 12 inches, 1 mile ≈ 1.609 km, and 1 nautical mile = 1852 m (international standard), widely used in the US, UK and marine/aviation.
Chinese traditional: li, chi, cun
The li, chi and cun are traditional Chinese units: 1 li = 500 m, 1 chi = 1/3 m. They still appear in traditional trades and folk usage.
FAQ
QHow many cm in an inch?
1 inch = 2.54 cm by exact international definition, not an approximation.
QHow many km in a mile?
1 mile ≈ 1.60934 kilometers.
QAre nautical miles the same as miles?
No. 1 nautical mile = 1852 m (international standard) for marine/aviation use; 1 statute mile ≈ 1609 m.
QHow many chi in a meter?
1 meter = 3 chi, so 1 chi ≈ 33.33 cm and 1 cun ≈ 3.33 cm.
QCan I copy the result?
Yes. Click the copy button next to a result to copy an “X unit = Y unit” string to the clipboard.