FORMULA
How to convert
km = mi × 1.609344Example: 10 mi = 16.09344 km.
MI → KM
Miles to Kilometers
Convert miles to kilometers with an exact, deterministic calculation.
LIVE CONVERSIONDECIMAL ENGINE EXACT_
1 mi = 1.609344 km
MULTI-CONVERT
QUICK ANSWER
1 Mile
1.609344 km
REFERENCE TABLE
Mile to Kilometer
| miles | kilometers |
|---|---|
| 1 mi | 1.609344 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
ABOUT THIS CONVERSION
Convert miles to kilometers
This page converts international statute miles to SI kilometers using the exact definition of 1 mile = 1.609344 kilometers. It is suitable for road distance, running, and mapping, but not for nautical-mile distances.
Real-world example
A 5 mi journey is 8.04672 km. That makes a five-mile training run a little over eight kilometers before any GPS or course-measurement variation is considered.
Rounding and precision
Do not report more precision than the original measurement supports. Keep two extra digits during calculation, then round once at the end. Construction may need the nearest millimeter or fraction of an inch; route distances rarely need that precision.
Regional context
Most countries use metric length units. US everyday measurements often use inches, feet, yards, and miles; UK road distances use miles even though metric units are common elsewhere. The converter uses international, not historical survey, definitions.
Common mistake
Multiplying by 1.6 is a good mental estimate but not an exact conversion. Use 1.609344 when mileage reimbursement, surveying, or race distances need greater precision.
Editorial method
Definitions and sources are listed below. Calculations retain more precision than the default display and round only for presentation.
USEFUL ANSWERS
mi to km FAQs
How many kilometers are in a mile?
One international statute mile is exactly 1.609344 kilometers.
Is a UK road mile different from a US mile?
Modern UK and US road distances use the same international statute mile.
How do I convert miles to kilometers?
Enter the mi value in the calculator. It applies the stored factor and offset definitions and returns the equivalent in km; the formula and common-value table are shown on this page.
Is the mi to km conversion exact?
Defined measurement relationships are calculated with decimal arithmetic from stored standards. The displayed answer may be rounded for readability. Currency results instead depend on the dated reference rate shown.
FROM UNIT
Mile
The international mile (mi) is exactly 1,609.344 meters, or 5,280 feet. It is a unit of one-dimensional distance.
NIST Guide to the SI, SP 811 ↗Definition verified 14 August 2026TO UNIT
Kilometer
The kilometer (km) is exactly 1,000 meters and is commonly used for road and geographic distances. It is a unit of one-dimensional distance.
NIST Guide to the SI, SP 811 ↗Definition verified 14 August 2026Content reviewed by Akhil Saroop · 16 August 2026 · Report an error on this page