How to convert miles to kilometers
Every mile is 1.6093 kilometers, so the conversion is a single multiplication:
Worked example: 25 mi → 25 × 1.60934 = 40.2335 km.
Quick mental estimate: Multiply by 1.6: 25 × 1.6 ≈ 40 km (exact: 40.2335).
Miles to kilometers conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.6093 km |
| 2 mi | 3.2187 km |
| 3 mi | 4.828 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.0934 km |
| 15 mi | 24.1401 km |
| 20 mi | 32.1868 km |
| 25 mi | 40.2335 km |
| 50 mi | 80.467 km |
| 75 mi | 120.7 km |
| 100 mi | 160.93 km |
| 200 mi | 321.87 km |
| 250 mi | 402.34 km |
| 500 mi | 804.67 km |
| 1,000 mi | 1,609.34 km |
Values rounded to four decimals. For a value that is not in the table, use the converter above — it accepts decimals and negative numbers.
When you need this conversion
- Buying anything sized abroad: screens, bike frames, luggage limits and clothing patterns switch between metric and imperial depending on where they were made.
- DIY and construction: timber, pipe diameters and fixings are stocked in one system or the other, and a plan drawn in one has to be ordered in the second.
- Travel and sport: race distances, altitudes and road signs change unit at almost every border.
Getting it right
The arithmetic is a single multiplication, so mistakes almost never come from the calculation itself — they come from the value that goes into it. Check that the figure you are converting really is in miles and not in a neighbouring unit, and that you have not already converted it once.
Sanity-check the direction of the result before you use it. One mile is 1.6093 kilometers, so converting miles to kilometers should make the number larger. If it moved the other way, the conversion was applied backwards — the reverse converter is one click away.
About the units
Mile (mi)
The mile is 5 280 feet, or exactly 1 609.344 meters. It is the road-distance unit of the United States and the United Kingdom.
Kilometer (km)
The kilometer is 1 000 meters. It is the unit of road distance and speed limits in almost every country outside the United States.
Frequently asked questions
How many kilometers are in 1 mile?
1 mile equals 1.6093 kilometers. To convert any value, multiply the number of miles by 1.60934.
How do I convert miles to kilometers in my head?
Multiply by 1.6: 25 × 1.6 ≈ 40 km (exact: 40.2335).
Is the mi to km conversion exact?
1 mile is exactly 1.609344 km; 1.60934 is that value rounded to 5 decimals.
How do I convert miles to kilometers in Excel or Google Sheets?
Put the value in A1 and use =A1*1.60934. Both Excel and Google Sheets also have a built-in function, =CONVERT(A1,"mi","km"), which avoids typing the factor by hand.
How many decimal places should I keep?
For everyday use two decimals are plenty. Keep four if the result feeds another calculation, and round only at the very end — rounding intermediate steps is the most common reason a result comes out slightly wrong.