Common Race Distances: KM to Miles
A 5K is 3.1 miles, or 5,000 m, and this chart converts race distances between kilometers, miles and meters in one place.
| Race Name | Kilometers | Miles | Meters |
|---|---|---|---|
| 1K | 1 km | 0.62 miles | 1,000 m |
| 1 Mile | 1.609 km | 1 mile | 1,609 m |
| 3K | 3 km | 1.86 miles | 3,000 m |
| 5K | 5 km | 3.1 miles | 5,000 m |
| 8K | 8 km | 4.97 miles | 8,000 m |
| 10K | 10 km | 6.2 miles | 10,000 m |
| 15K | 15 km | 9.3 miles | 15,000 m |
| 10 Miles | 16.09 km | 10 miles | 16,093 m |
| 20K | 20 km | 12.4 miles | 20,000 m |
| Half Marathon | 21.0975 km | 13.1 miles | 21,097 m |
| 25K | 25 km | 15.5 miles | 25,000 m |
| 30K | 30 km | 18.6 miles | 30,000 m |
| Marathon | 42.195 km | 26.2 miles | 42,195 m |
| 50K Ultra | 50 km | 31.1 miles | 50,000 m |
| 50 Mile Ultra | 80.47 km | 50 miles | 80,467 m |
| 100K Ultra | 100 km | 62.1 miles | 100,000 m |
Quick KM to Miles Reference (1-50 km)
1-10 KM
11-20 KM
21-30 KM
The gear these numbers assume
Every pace, zone and power figure on this page assumes something is measuring it. These are the three that cover running, cycling and the threshold work in between.
Multisport with the training-load and threshold metrics most of these calculations assume you can actually see day to day.
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KM to Miles Conversion Formula
KM to Miles
Example: 10 km × 0.621371 = 6.21 miles
Miles to KM
Example: 6.2 miles × 1.60934 = 9.98 km
Quick Mental Math Tip: To quickly estimate km to miles, multiply by 0.6. For miles to km, multiply by 1.6. These approximations are accurate within 3%.
Pace Conversion: Min/KM to Min/Mile
| Pace (min/km) | Pace (min/mile) | 5K Time | 10K Time | Half Marathon | Marathon |
|---|---|---|---|---|---|
| 4:00 | 6:26 | 20:00 | 40:00 | 1:24:23 | 2:48:46 |
| 4:30 | 7:14 | 22:30 | 45:00 | 1:34:55 | 3:09:50 |
| 5:00 | 8:03 | 25:00 | 50:00 | 1:45:29 | 3:30:58 |
| 5:30 | 8:51 | 27:30 | 55:00 | 1:56:02 | 3:52:04 |
| 6:00 | 9:39 | 30:00 | 1:00:00 | 2:06:35 | 4:13:10 |
| 6:30 | 10:28 | 32:30 | 1:05:00 | 2:17:08 | 4:34:16 |
| 7:00 | 11:16 | 35:00 | 1:10:00 | 2:27:41 | 4:55:22 |
| 7:30 | 12:04 | 37:30 | 1:15:00 | 2:38:14 | 5:16:28 |
| 8:00 | 12:53 | 40:00 | 1:20:00 | 2:48:47 | 5:37:34 |
Need Custom Conversions?
Use our free KM to Miles Calculator for instant conversions with pace and race time predictions.
Open KM to Miles CalculatorWhy KM to Miles Conversions Matter for Runners
Understanding distance conversions is essential for runners who train with international resources, travel for races, or use GPS watches that switch between metric and imperial units. Our guide to common race distances in kilometers and miles explains the standard events, and race prediction and goal setting turns those distances into target times.
Common Scenarios Where You Need Conversions
- International Races: Most world major marathons display distances in kilometers on course markers
- Training Plans: European training programs often use metric distances
- GPS Watch Settings: Switching between km and miles when traveling
- Pace Comparisons: Comparing your pace to international runners or records
- Treadmill Calibration: Some treadmills only display in kilometers
Tips for Memorizing Key Conversions
- 5K = 3.1 miles: Think "5K starts with 3" (3.1)
- 10K = 6.2 miles: Double 3.1 to get 6.2
- Half Marathon = 13.1 miles: Easy to remember as "13.1"
- Marathon = 26.2 miles: Double 13.1 to get 26.2
Frequently Asked Questions
How many miles is a 5K?
A 5K is 3.1 miles (3.107 miles to be exact). The 5K is the most popular race distance worldwide and equals 5,000 meters or 5 kilometers.
How many miles is a 10K?
A 10K is 6.2 miles (6.214 miles exactly). The 10K equals 10,000 meters or 10 kilometers and is a popular race distance for intermediate runners.
How many km is a marathon?
A marathon is 42.195 kilometers, which equals 26.2 miles (26.219 miles exactly). The marathon distance was standardized at the 1908 London Olympics.
What is the km to miles formula?
To convert kilometers to miles, multiply by 0.621371. For example: 10 km × 0.621371 = 6.21 miles. To convert miles to km, multiply by 1.60934.
How many miles is a half marathon?
A half marathon is 13.1 miles (13.109 miles exactly), which equals 21.0975 kilometers. It's exactly half the distance of a full marathon.