Miles to KM for Runners — Pace Conversion and Race Distances
- Runners switch between miles and km constantly — race distances, GPS watches, Strava, training plans. This guide converts pace and race distances both ways.
Table of Contents
Running apps, race registrations, and training plans often mix miles and kilometers. A 5K is 3.107 miles. A 10K is 6.214 miles. A marathon is 26.22 miles (42.195 km). The converter above handles the distance conversion — and the pace chart below handles the rest.
Pace conversion requires a different formula than distance. A 9:00/mile pace is not 9:00/km — it is 5:36/km. Here is how to convert both.
Race Distances — Miles and KM
| Race | KM | Miles |
|---|---|---|
| 1 mile | 1.609 km | 1.0 |
| 5K | 5.000 km | 3.107 |
| 10K | 10.000 km | 6.214 |
| 15K | 15.000 km | 9.321 |
| Half marathon | 21.098 km | 13.109 |
| 25K | 25.000 km | 15.534 |
| 30K | 30.000 km | 18.641 |
| Marathon | 42.195 km | 26.219 |
| 50K ultra | 50.000 km | 31.069 |
| 100K ultra | 100.000 km | 62.137 |
Pace Conversion — Min/Mile to Min/KM
To convert pace from min/mile to min/km: divide by 1.60934. To convert min/km to min/mile: multiply by 1.60934.
| Min/Mile | Min/KM | MPH | KM/H |
|---|---|---|---|
| 6:00 | 3:44 | 10.0 | 16.1 |
| 7:00 | 4:21 | 8.57 | 13.8 |
| 8:00 | 4:58 | 7.50 | 12.1 |
| 9:00 | 5:36 | 6.67 | 10.7 |
| 10:00 | 6:13 | 6.00 | 9.66 |
| 11:00 | 6:50 | 5.45 | 8.77 |
| 12:00 | 7:27 | 5.00 | 8.05 |
Switching Your GPS Watch Between Miles and KM
Most GPS watches (Garmin, Apple Watch, Polar, Suunto) let you toggle between miles and kilometers in the settings. On Garmin watches: Settings → Units → Distance → Kilometers or Miles. On Apple Watch: open the Workout app settings in the Watch app on your iPhone.
Strava lets you set your preferred unit under Settings → Measurement Preference. All historical activities update automatically when you switch.
Converting Speed for Treadmill Settings
Treadmill speeds are often in mph in the US and km/h elsewhere. Common treadmill speeds: 5 mph = 8.0 km/h (easy jogging pace), 6 mph = 9.7 km/h (comfortable running), 8 mph = 12.9 km/h (fast running), 10 mph = 16.1 km/h (sprinting). Use the Speed tab in the unit converter for any mph to km/h conversion.
Convert Running Distances and Pace
Miles to km, mph to km/h — all in one free converter built for runners and athletes.
Open Unit Converter FreeFrequently Asked Questions
How many km in a half marathon?
A half marathon is 21.0975 kilometers (13.1094 miles).
What is a 9 minute mile in km/h?
A 9:00/mile pace equals 6.67 mph, which is 10.73 km/h.
How do I convert my Garmin from miles to km?
On Garmin: go to Settings, then Units, then Distance, and select Kilometers. The exact path varies slightly by model.
How far is a 5K in miles?
A 5K race is 5 kilometers, which equals 3.107 miles.
