Convert miles to kilometers (mi to km)
To convert miles to kilometers, multiply the value in miles by 1.609344. It is useful for US and UK road distances, running and cycling routes, and car mileage when you think in kilometers. This miles to km converter works both ways: type miles or kilometers into either box above and the other box, the worked formula and the chart below update as you type.
The statute mile (mi) is 5,280 feet, exactly 1,609.344 meters. It descends from the Roman mille passus, a thousand paces. Miles are used for road distances and speed limits in the US and the UK, and in running — a marathon is about 26.2 miles. One mile is 1.60934 kilometers.
The kilometer (km), or kilometre, is 1,000 meters — roughly a 10 to 12 minute walk. Going the other way, one kilometer equals 0.621371 miles. It is the standard unit for road distances and speed limits in India, mainland Europe, Australia and most other countries, and for race distances such as the 5K and 10K.
How to convert miles to km with this tool
- Type a number into the Miles (mi) box — it starts at 1 mi as an example.
- Read the answer in the Kilometers (km) box and in the result panel, which also shows the formula with your number.
- To go the other way, type into the kilometers box, or press the swap button to open the KM to Miles converter with your value carried over.
- Choose how many decimal places you want, or tap a quick value such as 5 mi, 10 mi, 26.2 mi.
- Press Copy result to paste the conversion into a message, spreadsheet or note.
Miles to KM converter features
Converts both ways
Type in the miles box to get kilometers, or in the kilometers box to get miles. The other box follows instantly.
Exact factor
Calculations use 1 mi = 1.609344 km, and rounding is applied only to the answer you see — choose Auto or 0–10 decimal places.
Formula with your number
The working is shown under the result, for example 1 mi × 1.609344 = 1.6093 km, so you can check it or copy the method.
Quick values and chart
Tap common values like 5 mi, 10 mi, 26.2 mi, or read the miles-to-kilometers table further down this page.
Miles to KM formula
The formula is km = mi × 1.609344. It is exact because the international mile is exactly 1.609344 kilometers (5,280 ft × 0.3048 m).
The reverse formula is mi = km ÷ 1.609344 — or use the KM to Miles converter. Three worked examples:
- One mile: 1 mi × 1.609344 = 1.6093 km
- A marathon (26.2 mi): 26.2 mi × 1.609344 = 42.1648 km
- A 60-mile trip: 60 mi × 1.609344 = 96.5606 km
Miles to KM quick reference
The values people look up most often, worked out with the exact factor:
- 1 mi = 1.60934 km
- 1 km = 0.621371 mi
- 5 mi = 8.0467 km
- 10 mi = 16.0934 km
- 26.2 mi = 42.1648 km
- 60 mi = 96.5606 km
Quick tip: Multiply by 1.6 for a close estimate: 50 mi × 1.6 = 80 km, versus the exact 80.4672 km. Or use Fibonacci pairs: 3 mi ≈ 5 km and 5 mi ≈ 8 km.
Related conversions: CM to Inches, Inches to CM and the full length converter.
Miles to KM conversion table
Values in kilometers are rounded to 4 decimal places (more for very small numbers). For any value not listed, type it into the converter above.
| mi | km | mi | km |
|---|---|---|---|
| 1 | 1.6093 | 30 | 48.2803 |
| 2 | 3.2187 | 35 | 56.327 |
| 3 | 4.828 | 40 | 64.3738 |
| 4 | 6.4374 | 45 | 72.4205 |
| 5 | 8.0467 | 50 | 80.4672 |
| 6 | 9.6561 | 55 | 88.5139 |
| 7 | 11.2654 | 60 | 96.5606 |
| 8 | 12.8748 | 65 | 104.6074 |
| 9 | 14.4841 | 70 | 112.6541 |
| 10 | 16.0934 | 75 | 120.7008 |
| 11 | 17.7028 | 80 | 128.7475 |
| 12 | 19.3121 | 85 | 136.7942 |
| 13 | 20.9215 | 90 | 144.841 |
| 14 | 22.5308 | 95 | 152.8877 |
| 15 | 24.1402 | 100 | 160.9344 |
| 16 | 25.7495 | 150 | 241.4016 |
| 17 | 27.3588 | 200 | 321.8688 |
| 18 | 28.9682 | 250 | 402.336 |
| 19 | 30.5775 | 500 | 804.672 |
| 20 | 32.1869 | 1,000 | 1,609.344 |
| 25 | 40.2336 |
Miles to KM FAQ
How many kilometers is 5 mi?
5 miles is 8.0467 kilometers: 5 mi × 1.609344 = 8.0467 km.
How do I convert miles to km?
Multiply the value in miles by 1.609344. For example, 100 mi × 1.609344 = 160.9344 km. To convert back, divide the value in kilometers by 1.609344 — or use the KM to Miles converter.
How many miles are in one kilometer?
One kilometer is 0.6214 miles, because 1 km ÷ 1.609344 = 0.6214 mi.
What is 100 miles in kilometers?
Is a nautical mile the same as a mile?
No. This page uses the statute (land) mile of 1,609.344 m. A nautical mile, used at sea and in aviation, is exactly 1,852 m — about 1.15 statute miles, since 1.15078 mi = 1.852 km.