KM to Miles Converter
Kilometres show up in GPX files, race distances and most road signs outside mile-using markets; miles are still standard on roads in the US and UK and in many fitness apps set to imperial units. Enter a kilometre value and get the statute-mile equivalent rounded to the precision your next step needs: 4 decimals for pace splits, 1 decimal for trip odometers.
How to convert kilometres to miles
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1
Enter a distance
Type the distance: a 10K run, a 380 km road trip, or an 800 m lap.
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2
Read the mile value
Results appear in statute (land) miles, not nautical miles.
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3
Choose precision
Round to the decimal your form, fitness log or spreadsheet expects.
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4
Copy the result
Paste it into Strava, Garmin export sheets, car manuals or travel notes.
Statute, nautical and survey miles
“Mile” can mean different things. This converter uses the international statute mile (1 mi = 1.609344 km exactly) because that is what road distances, running events and fitness trackers report. Other miles exist and do not match:
| Mile variant | Value in km | Used for |
|---|---|---|
| Statute mile (international) | 1.609344 km | Road signs, athletics, everyday distances |
| Nautical mile | 1.852 km | Marine and aviation navigation |
| US survey mile | 1.609347218… km | Legacy US land-survey records |
| Roman mile | ~1.48 km | Historical texts only |
Since 2023, US federal surveying uses the international foot rather than the old survey foot, so the survey mile mostly matters for legacy deeds and older coordinate records. For road signs, running logs and travel planning, use the first row.
Useful anchor distances
- 5K = 3.1069 mi, the standard Parkrun distance.
- 10K = 6.2137 mi, the reason runners often remember “6.2 miles”.
- Half marathon = 21.0975 km = 13.1094 mi.
- Marathon = 42.195 km = 26.2188 mi, usually rounded to 26.2 miles.
- 100 km brevet = 62.14 mi, a common cycling audax benchmark.
Driving notes
- Speed limits do not scale with distance conversion. 80 km/h is 49.7 mph, not 80 mph.
- A car’s trip computer often lets you switch units, but fuel economy stays baked in as km/L or mpg; converting requires both distance and volume.
- Older GPS units can mix nautical and statute miles if you select “aviation” mode by accident. Check the unit label before trusting a distance.
Frequently Asked Questions
The exact factor is 0.62137119223733… For driving or travel planning, 0.62 is usually fine; for race times, spreadsheets or scientific measurements, use at least 0.621371 to avoid drift over long distances.
The modern marathon is standardized at 42.195 km, which is 26 miles and 385 yards. That distance came from the 1908 London Olympic marathon and is now the road-racing standard.
UK road distances and speed limits are in miles; race distances (5K, 10K, marathons), athletics and fuel-economy for new cars increasingly use kilometres. Expect both in everyday life.
No. The multiplication runs right in the page and nothing is uploaded or logged.
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