Mile to Kilometer Converter
Length · unit-converter
Convert Mile to Kilometer 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: Mile (mi)
To: Kilometer (km)
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.
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.
How to convert miles to kilometers
1 mile is equal to 1.609344 kilometer:
1 mi = (1609.344 m ÷ 1000 m) km = 1.609344 km
Each mile is defined as 1609.344 m and each kilometer as 1000 m, so one mi equals 1609.344 ÷ 1000 km = 1.609344 km.
Let d(mi) be the numeric value of the same length measured in Mile (mi), and d(km) the value in Kilometer (km). Then:
d(km) = d(mi) × (1609.344 / 1000)
Equivalently, divide by how many mi fit into one km (meters per km divided by meters per mi):
d(km) = d(mi) ÷ 0.62137119223733
Or: kilometer = mile ÷ 0.62137119223733
Examples
Example #1: Convert 20 mi to kilometer
20 mi = 20 mi × (1609.344/1000) km = 32.18688 km
20 mi = 20 mi ÷ 0.62137119223733 = 32.18688 km
Example #2: Convert 50 mi to kilometer
50 mi = 50 mi × (1609.344/1000) km = 80.4672 km
50 mi = 50 mi ÷ 0.62137119223733 = 80.4672 km
Summary
To convert Mile to Kilometer, multiply the value in mi by the ratio of meters per mi divided by meters per km. Equivalently: value_km = value_mi × (1609.344 / 1000). Numerically, 1 mi equals 1.609344 km.
Relationship context
You are converting between US customary / imperial (Miles) and metric (SI) (Kilometers). 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
| Mile (mi) | Kilometer (km) |
|---|---|
| 0.1 | 0.1609344 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 4 | 6.437376 |
| 5 | 8.04672 |
| 6 | 9.656064 |
| 7 | 11.265408 |
| 8 | 12.874752 |
| 9 | 14.484096 |
| Mile (mi) | Kilometer (km) |
|---|---|
| 10 | 16.09344 |
| 20 | 32.18688 |
| 30 | 48.28032 |
| 40 | 64.37376 |
| 50 | 80.4672 |
| 60 | 96.56064 |
| 70 | 112.65408 |
| 80 | 128.74752 |
| 90 | 144.84096 |
| 100 | 160.9344 |
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).
- mile to nmiMile to Nautical Mile
- mile to chainMile to Chain
- mile to fathomMile to Fathom
- mile to umMile to Micrometer
- mile to nmMile to Nanometer
- mile to angstromMile to Angstrom
- mile to pmMile to Picometer
- nmi to kmNautical Mile to Kilometer
- chain to kmChain to Kilometer
- fathom to kmFathom to Kilometer
- um to kmMicrometer to Kilometer
- nm to kmNanometer to Kilometer