True two-way conversion
Type kilometers or miles and the other box updates instantly. There is no direction to choose and no button to press.
Distance · Speed · Running pace
KM to Miles Converter
Convert km to miles instantly, and miles to km in the same box. Type in either field, pick a race distance with one tap, or switch tabs to convert km/h to mph and running pace per km to pace per mile.
- Two-way, live results
- 5K to marathon presets
- Speed & pace modes
- Printable chart
- Private, nothing stored
Convert kilometers to miles
Popular distances
Tip: type in either box. 1 km = 0.621371 mi and 1 mi = 1.609344 km.
Result
10km=6.214miles
10 km × 0.621371 = 6.214 mi
Same distance in other units
- Meters
- 10,000
- Feet
- 32,808.4
- Yards
- 10,936.13
- Nautical miles
- 5.4
How long it takes
- Walking 5 km/h
- 2 h 0 min
- Running 10 km/h
- 1 h 0 min
- Cycling 20 km/h
- 30 min
- Steps (approx.)
- 13,123
Common speeds
Tip: 1 km/h = 0.621371 mph and 1 mph = 1.609344 km/h.
Result
100km/h=62.137mph
100 km/h × 0.621371 = 62.137 mph
Same speed in other units
- Meters/second
- 27.778
- Knots
- 53.996
- Feet/second
- 91.134
- Time per 100 km
- 1 h 0 min
Common paces
Enter pace as minutes:seconds, for example 5:30.
Result
5:00/km=8:03/mile
Speed: 12 km/h · 7.456 mph
Finish times at this pace
- 5K
- 25:00
- 10K
- 50:00
- Half marathon
- 1:45:29
- Marathon
- 3:30:59
Features
Why this km to miles converter is faster
Most converters make you pick a direction, press a button and scroll past ads. This one answers as you type and adds the context you actually need.
Race presets
Tap 5K, 10K, half marathon or marathon to see the exact distance in miles, with no need to remember 42.195.
Speed and pace built in
Switch tabs to convert km/h to mph for driving, or pace per km to pace per mile for running, with finish times.
Every related unit
See the same distance in meters, feet, yards and nautical miles, plus walking, running and cycling times.
Exact, adjustable precision
The converter uses the official factor of 1.609344 and lets you choose 2 to 6 decimal places.
Copy and share
Copy a clean result for a message, or share a link that reopens the converter with your exact numbers.
How it works
How to use the km to miles converter
It takes a few seconds. Here is the quickest way to get an exact answer.
Pick a mode
Choose Distance for km and miles, Speed for km/h and mph, or Pace for running splits.
Type a value
Enter a number in either box. The other box and all extra units update as you type.
Use a preset
Tap a chip such as 5K or 100 km/h when you want a common value in one click.
Copy or share
Set the decimals you need, then copy the result or share a link to it.
The formula
How to convert km to miles
A mile is defined as exactly 1,609.344 meters, so the conversion never changes. To convert kilometers to miles, multiply by 0.621371. To go back, multiply miles by 1.609344.
Km to miles and miles to km formulas
miles =kilometers × 0.621371
kilometers =miles × 1.609344
Example:25 km × 0.621371 = 15.534 milesMultiply by 0.6
For a fast estimate, multiply kilometers by 0.6. For example, 10 km is about 6 miles, and the exact answer is 6.214.
Times 5, divided by 8
One kilometer is very close to five-eighths of a mile. So 40 km × 5 ÷ 8 gives 25 miles, against an exact 24.855.
The Fibonacci shortcut
Neighbouring Fibonacci numbers work as miles and km: 3 mi ≈ 5 km, 5 mi ≈ 8 km and 8 mi ≈ 13 km.
Chart
Km to miles conversion chart
Use these tables for quick lookups. Values are rounded to three decimal places.
| Kilometers | Miles |
|---|---|
| 1 km | 0.621 mi |
| 2 km | 1.243 mi |
| 3 km | 1.864 mi |
| 4 km | 2.485 mi |
| 5 km | 3.107 mi |
| 6 km | 3.728 mi |
| 7 km | 4.350 mi |
| 8 km | 4.971 mi |
| 9 km | 5.592 mi |
| 10 km | 6.214 mi |
| 15 km | 9.321 mi |
| 20 km | 12.427 mi |
| 25 km | 15.534 mi |
| 30 km | 18.641 mi |
| 40 km | 24.855 mi |
| 50 km | 31.069 mi |
| 60 km | 37.282 mi |
| 70 km | 43.496 mi |
| 80 km | 49.710 mi |
| 90 km | 55.923 mi |
| 100 km | 62.137 mi |
| 200 km | 124.274 mi |
| 500 km | 310.686 mi |
| 1,000 km | 621.371 mi |
| Miles | Kilometers |
|---|---|
| 1 mi | 1.609 km |
| 2 mi | 3.219 km |
| 3 mi | 4.828 km |
| 4 mi | 6.437 km |
| 5 mi | 8.047 km |
| 6 mi | 9.656 km |
| 7 mi | 11.265 km |
| 8 mi | 12.875 km |
| 9 mi | 14.484 km |
| 10 mi | 16.093 km |
| 15 mi | 24.140 km |
| 20 mi | 32.187 km |
| 25 mi | 40.234 km |
| 30 mi | 48.280 km |
| 40 mi | 64.374 km |
| 50 mi | 80.467 km |
| 60 mi | 96.561 km |
| 70 mi | 112.654 km |
| 80 mi | 128.748 km |
| 90 mi | 144.841 km |
| 100 mi | 160.934 km |
| 200 mi | 321.869 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.344 km |
Real-world use
Race distances and road speeds in miles
Runners and drivers ask for these conversions most often, so here they are in one place.
| Race | Kilometers | Miles |
|---|---|---|
| 5K | 5 | 3.107 |
| 10K | 10 | 6.214 |
| 15K | 15 | 9.321 |
| Half marathon | 21.0975 | 13.109 |
| Marathon | 42.195 | 26.219 |
| 50K ultra | 50 | 31.069 |
| 100K ultra | 100 | 62.137 |
| km/h | mph |
|---|---|
| 30 km/h | 18.6 mph |
| 50 km/h | 31.1 mph |
| 60 km/h | 37.3 mph |
| 80 km/h | 49.7 mph |
| 100 km/h | 62.1 mph |
| 110 km/h | 68.4 mph |
| 120 km/h | 74.6 mph |
| 130 km/h | 80.8 mph |
- Running pace: multiply your pace per km by 1.609344 to get pace per mile. A 5:00 /km pace equals about 8:03 /mile.
- Road signs: the UK and US use miles and mph, while most other countries, including India, use km and km/h.
Benefits
Who benefits from converting km to miles?
The metric and imperial systems meet every day. These are the people who use this converter most.
Runners
Match race distances and training plans written in miles with the kilometers on your watch.
Drivers
Understand speed limits abroad and compare car specs quoted in mph with km/h.
Travellers
Plan road trips and hikes when maps, signs and guides use a different system than you do.
Students
Check homework and learn the exact factor, plus mental shortcuts that work in any exam.
FAQ
Km to miles FAQs
Short, exact answers to the most common distance questions.
How many miles is 1 km?
One kilometer equals 0.621371 miles, which is a little over six-tenths of a mile. Put another way, 1 km is roughly five-eighths of a mile.
How do I convert km to miles?
Multiply the number of kilometers by 0.621371. You can also divide by 1.609344 and get the same answer. For example, 20 km × 0.621371 = 12.427 miles.
How many km are in a mile?
There are exactly 1.609344 kilometers in one mile. This value has been fixed by international agreement since 1959.
How many miles is a 5K?
A 5K race is 3.107 miles, usually rounded to 3.1 miles. A 10K is 6.214 miles, or about 6.2 miles.
How long is a marathon in miles?
A marathon is 42.195 km, which equals 26.219 miles. Most people round it to 26.2 miles. A half marathon is 13.109 miles.
What is 100 km/h in mph?
100 km/h equals 62.137 mph. To convert any speed, multiply km/h by 0.621371, or use the Speed tab in the converter above.
Is a kilometer longer than a mile?
No. A mile is longer, at about 1.61 times the length of a kilometer. So any distance always has a smaller number in miles than in kilometers.
Convert any distance in seconds
Whether you are training for a race, planning a trip or checking a speed limit, this km to miles converter gives you an exact answer with useful context. Keep it bookmarked, and explore more tools below.
Convert km to milesConversions use the international mile of exactly 1,609.344 meters. Walking, running, cycling and step figures are estimates based on typical speeds and a 0.762 m stride.