Length unit converter
Convert length units — millimetres to kilometres, inches, feet, yards, miles, nautical miles and the Chinese market chi/cun/zhang/li — with all 13 common units at once.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Result
The source to target line first, then every common unit.
Enter a length to convert
Units: 0
What this tool does
- Convert imperial and metric lengths while shopping, reading blueprints or writing specs.
- Fold Chinese market units into metric: 1 chi = 1/3 m and 1 li = 500 m are legal definitions.
- Copy exact definition values into code: 1 in = 25.4 mm and 1 mi = 1609.344 m.
Example
Input
1
Output
米 (m) → 英尺 (ft)：1 m = 3.28084 ft 毫米 (mm) = 1000 mm 厘米 (cm) = 100 cm 米 (m) = 1 m 千米 (km) = 0.001 km 英寸 (in) = 39.370079 in 英尺 (ft) = 3.28084 ft 码 (yd) = 1.093613 yd 英里 (mi) = 0.000621 mi 海里 (nmi) = 0.00054 nmi 市里 (市里) = 0.002 市里 市尺 (市尺) = 3 市尺 市寸 (市寸) = 30 市寸 市丈 (市丈) = 0.3 市丈
1 m = 3.28084 ft because 1 ft = 0.3048 m by definition; all 13 units are listed below.
Frequently asked questions
Are feet, miles and nautical miles exact values?
Yes: 1 in = 25.4 mm, 1 ft = 0.3048 m, 1 mi = 1609.344 m and 1 nmi = 1852 m are exact definitions. Every result is printed with Number(value.toFixed(6)).
How are the Chinese market units defined?
By GB 3100: 1 chi = 1/3 m, 1 cun = 1/30 m, 1 zhang = 10/3 m and 1 li = 500 m. Taiwan and Hong Kong use a different chi (about 0.303 m).
Why does one chi show as 0.333333 m?
Results are rounded to 6 decimals. Use the exact factors shown on the page when you need more precision.
Can I convert to every unit at once?
Yes — all 13 length units are listed at once and stay in sync while you type.
Keywords：长度换算length converter英寸转毫米米换英尺市尺换算海里单位换算feet to meter