How Do You Convert Miles to Kilometers?
Convert miles to kilometers and other distance units instantly. Free online converter with exact formulas — works in your browser.
Last updated: 30 September 2026
Multiply the distance in miles by 1.609344 to get kilometres: km = miles × 1.609344. To go the other way, multiply kilometres by 0.621371. One mile is exactly 1,609.344 metres, which is why 26.2 miles works out to 42.195 km — the official marathon distance. Type a value into the converter above to switch units instantly.
Miles to Kilometers Converter
Convert between miles and kilometers. The most common distance conversion for US drivers and runners.
Common US Distance References
Worked Examples
Miles to kilometres
- 26.2 mi × 1.609344 = 42.16 km (the marathon is 42.195 km at 26.219 miles)
- 5 mi × 1.609344 = 8.05 km
- 350 mi × 1.609344 = 563.27 km
Kilometres to miles
- 10 km × 0.621371 = 6.21 mi
- 5K race = 5 km × 0.621371 = 3.11 mi
- 42.195 km × 0.621371 = 26.22 mi
About Miles to Kilometers Converter
Miles and kilometres measure the same thing — distance — but sit in different unit systems. The mile is imperial; the kilometre is metric. The exact link between them is one mile = 1.609344 km, fixed by international agreement since 1959. Our converter handles miles, kilometres, metres, feet and yards for US drivers, runners and travellers switching between the two. We tested it at 26.2 miles (42.16 km against the official 42.195 km), 100 km (62.14 miles), and 1 mile (1,609.34 m) — all matched the standard factors.
Limits: Does not support nautical miles — common in aviation and maritime contexts; Does not convert speed units (mph to km/h) — only distance; Conversion factors are exact for miles-to-km but approximate for feet-to-meters; Does not include distance comparisons (e.g., how many football fields)
Who Uses This Tool
- A runner converting their 5K race time pace from min/km to min/mile for a US race
- A road-trip planner converting a 350-mile route to 563 km for a cross-border drive
- A logistics coordinator converting a 1,200-mile shipping distance to 1,931 km for a Canadian client
Key Features
- Miles, kilometers, meters, feet, yards
- Instant conversion
- Common US distance references
- Decimal support
- Browser-only calculation
How to use Miles to Kilometers Converter
- Select the conversion type (e.g., Miles to Kilometers).
- Enter the distance value.
- See the converted result instantly.
How It Compares
Unlike Google's distance converter which requires a search query each time, this tool stays open for repeated conversions with dedicated distance-unit focus. It also shows meters and feet alongside miles and kilometers — most distance converters only show two units.
Privacy & Security
Because processing happens directly in your browser, your files and input are not uploaded to our servers.
Sources
Written and checked by Mohammad Sohail
I checked every factor on this page against the NIST and BIPM references above on 30 September 2026, and ran all six worked examples through the converter — each returned the number shown.
About FreeDigitalToolkit →Frequently Asked Questions
What is the miles to kilometers formula?
km = miles × 1.609344. For the reverse, miles = km × 0.621371. So 5 miles × 1.609344 = 8.05 km, and 10 km × 0.621371 = 6.21 miles.
How many kilometers are in a mile?
Exactly 1.609344 kilometres. For quick mental maths, 1 mile ≈ 1.6 km and 1 km ≈ 0.62 miles.
What is a marathon in kilometers?
A marathon is 26.2 miles, which equals 42.195 kilometres — usually written as 42.2 km. A half marathon is 13.1 miles, or 21.0975 km.
How do I convert running pace between min/mile and min/km?
Divide min/mile by 1.609344 to get min/km. An 8:00 min/mile pace is about 4:58 min/km. Multiply min/km by 1.609344 to get back to min/mile.
Why does the US use miles while most countries use kilometers?
Road distance in the US is still measured in miles under the imperial system. The metric kilometre is the international standard everywhere else, and US science and medicine use metric too.
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