Miles to KM Converter
Quick answer: To convert miles to KM, multiply by 1.609344. For example, 10 mi is 16.09344 km. One mile equals 1.609344 km.
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Use the Miles to KM Converter
Miles to KM formula and what each symbol means
km = mi × 1.609344
| Symbol | Meaning |
|---|---|
| mi | Mile |
| km | Kilometer |
Miles to KM examples
1 mi
1 mi × 1.609344 = 1.609344 km.
10 mi
10 mi × 1.609344 = 16.09344 km.
100 mi
100 mi × 1.609344 = 160.9344 km.
Miles compared with KM
One mi is 1.609 times as large as one km, so your number gets bigger when you convert miles to KM and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About miles and KM
Mile (mi): The international statute mile, exactly 1,609.344 metres or 5,280 feet. Kilometer (km): 1,000 metres, used for road distances in most countries.
Where miles to KM conversions are used
Screen sizes, tyres and clothing are usually given in inches, and body measurements in centimetres or inches. Sports, aviation and shipping each keep their own favourites: yards on a football pitch, feet for altitude, nautical miles at sea.
How to calculate Miles to KM step by step
- Enter the value in mi (the starting unit).
- Multiply by 1.609344, because 1 mi = 1.609344 km.
- The product is the value in km. To go back, divide by 1.609344 or multiply by 0.6213712.
Popular length conversions
How to read your Miles to KM result
Quick estimate: multiply by about 1.6 to get KM from miles; this is within 0.6% of the exact factor. Between metric and imperial, the key fact is that 1 inch is exactly 2.54 cm, which makes 1 foot exactly 0.3048 m, 1 yard exactly 0.9144 m and 1 mile exactly 1,609.344 m.
| MILES | KM |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 1,000 | 1,609.344 |
KM to Miles: quick table
| KM | MILES |
|---|---|
| 1 | 0.6213712 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 25 | 15.53428 |
| 50 | 31.06856 |
| 100 | 62.13712 |
| 250 | 155.3428 |
| 500 | 310.6856 |
Common mistakes when calculating Miles to KM
- Confusing statute miles (1,609.344 m) with nautical miles (exactly 1,852 m).
- Dividing when you should multiply: from mi to km multiply by 1.609344; from km to mi divide by 1.609344.
Miles to KM FAQ
How many km are in 1 mi?
1 mi equals 1.609344 km.
How many mi are in 1 km?
1 km equals 0.6213712 mi.
Is 1 mi = 1.609344 km an exact conversion?
Yes. The mile and the kilometer are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 1.609344 is just that ratio shown to 7 significant figures.
What is a kilometer (km)?
1,000 metres, used for road distances in most countries.
How can I estimate miles to KM in my head?
Quick estimate: multiply by about 1.6 to get KM from miles; this is within 0.6% of the exact factor.
What is 40 mi in KM?
40 mi = 64.37376 km (since 40 × 1.609344).
What is 200 mi in KM?
200 mi = 321.8688 km (since 200 × 1.609344).
What is 3 mi in KM?
3 mi = 4.828032 km (since 3 × 1.609344).
How many decimals should I keep when converting mi to km?
Match the precision of your original measurement. For example, 16.09344 km rounds to 16.1 km at 3 significant figures; keep more digits only for engineering or scientific work.
More in Length converters
- Miles to Yards Converter
- Miles to CM Converter
- MM to CM Converter
- Meters to Yards Converter
- MM to Feet Converter
- Meters to MM Converter
See all length converters tools · All Conversion calculators · Site map
Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the SI base units