Convert km to miles
1 km = 0.621371 mi · 1 mi = 1.60934 km · Exact by definition
1 km = 0.621371 mi
The same value in other units
- millimetre
- 1000000 mm
- centimetre
- 100000 cm
- metre
- 1000 m
- inch
- 39370.1 in
- foot
- 3280.84 ft
- yard
- 1093.61 yd
- nautical mile
- 0.539957 nmi
Settings
Digits kept in the answer. Automatic keeps six, which hides floating-point noise without losing anything real.
Convert a whole list
Paste one conversion per line, written the way you would say it: "5 km to mi". Handy for a column copied out of a spreadsheet.
Length
km to miles: conversion table
| kilometre | mile |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.24274 mi |
| 3 km | 1.86411 mi |
| 5 km | 3.10686 mi |
| 10 km | 6.21371 mi |
| 20 km | 12.4274 mi |
| 25 km | 15.5343 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
| 250 km | 155.343 mi |
| 500 km | 310.686 mi |
| 1000 km | 621.371 mi |
| mile | kilometre |
|---|---|
| 1 mi | 1.60934 km |
| 2 mi | 3.21869 km |
| 3 mi | 4.82803 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.0934 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.934 km |
| 250 mi | 402.336 km |
| 500 mi | 804.672 km |
| 1000 mi | 1609.34 km |
How the conversion works
mi = km × 0.62137119
Both units are defined exactly, so the precision of the km to miles result depends only on the number of decimal places you choose.
METHOD AND SOURCES
Where the conversion factors come from
Results are calculated from the unit definitions stored in the converter, not copied from a lookup table. For exact units, every value in the table follows from the same factor shown in the formula above.
- BIPM — SI Brochure
The official definitions of the International System of Units (SI).
- NIST SP 811 — Conversion factors
Conversion-factor tables for SI and non-SI units.
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