Kilometer to Mile Converter
Length · unit-converter
Convert Kilometer to Mile with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Kilometer (km)
To: Mile (mi)
About Kilometer
The kilometer is an SI unit equal to 1,000 meters. It is the standard unit for longer distances in most countries that use the metric system.
About Mile
The statute mile is a US customary and imperial unit equal to exactly 1,609.344 meters. It is widely used for road distances in the United States and the United Kingdom.
How to convert kilometers to miles
1 kilometer is equal to 0.62137119223733 mile:
1 km = (1000 m ÷ 1609.344 m) mi = 0.62137119223733 mi
Each kilometer is defined as 1000 m and each mile as 1609.344 m, so one km equals 1000 ÷ 1609.344 mi = 0.62137119223733 mi.
Let d(km) be the numeric value of the same length measured in Kilometer (km), and d(mi) the value in Mile (mi). Then:
d(mi) = d(km) × (1000 / 1609.344)
Equivalently, divide by how many km fit into one mi (meters per mi divided by meters per km):
d(mi) = d(km) ÷ 1.609344
Or: mile = kilometer ÷ 1.609344
Examples
Example #1: Convert 20 km to mile
20 km = 20 km × (1000/1609.344) mi = 12.4274238447 mi
20 km = 20 km ÷ 1.609344 = 12.4274238447 mi
Example #2: Convert 50 km to mile
50 km = 50 km × (1000/1609.344) mi = 31.0685596119 mi
50 km = 50 km ÷ 1.609344 = 31.0685596119 mi
Summary
To convert Kilometer to Mile, multiply the value in km by the ratio of meters per km divided by meters per mi. Equivalently: value_mi = value_km × (1000 / 1609.344). Numerically, 1 km equals 0.621371192237334 mi.
Relationship context
You are converting between metric (SI) (Kilometers) and US customary / imperial (Miles). Metric units are decimal; imperial units use inches, feet, yards, and miles tied to the international yard definition. Nautical miles are defined in meters (1 nmi = 1,852 m). This tool uses SI-based factors so results stay consistent with modern standards.
Conversion tables
| Kilometer (km) | Mile (mi) |
|---|---|
| 0.1 | 0.0621371192 |
| 1 | 0.6213711922 |
| 2 | 1.2427423845 |
| 3 | 1.8641135767 |
| 4 | 2.485484769 |
| 5 | 3.1068559612 |
| 6 | 3.7282271534 |
| 7 | 4.3495983457 |
| 8 | 4.9709695379 |
| 9 | 5.5923407301 |
| Kilometer (km) | Mile (mi) |
|---|---|
| 10 | 6.2137119224 |
| 20 | 12.4274238447 |
| 30 | 18.6411357671 |
| 40 | 24.8548476895 |
| 50 | 31.0685596119 |
| 60 | 37.2822715342 |
| 70 | 43.4959834566 |
| 80 | 49.709695379 |
| 90 | 55.9234073014 |
| 100 | 62.1371192237 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- km to nmiKilometer to Nautical Mile
- km to chainKilometer to Chain
- km to fathomKilometer to Fathom
- km to umKilometer to Micrometer
- km to nmKilometer to Nanometer
- km to angstromKilometer to Angstrom
- km to pmKilometer to Picometer
- nmi to mileNautical Mile to Mile
- chain to mileChain to Mile
- fathom to mileFathom to Mile
- um to mileMicrometer to Mile
- nm to mileNanometer to Mile