KM to Miles Converter
Quick answer: To convert KM to miles, multiply by 0.6213712. For example, 10 km is 6.213712 mi. One kilometer equals 0.6213712 mi.
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Use the KM to Miles Converter
KM to Miles formula and what each symbol means
mi = km × 0.6213712
| Symbol | Meaning |
|---|---|
| km | Kilometer |
| mi | Mile |
KM to Miles examples
1 km
1 km × 0.6213712 = 0.6213712 mi.
10 km
10 km × 0.6213712 = 6.213712 mi.
100 km
100 km × 0.6213712 = 62.13712 mi.
KM compared with Miles
One mi is 1.609 times as large as one km, so your number gets smaller when you convert KM to miles and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About KM and miles
Kilometer (km): 1,000 metres, used for road distances in most countries. Mile (mi): The international statute mile, exactly 1,609.344 metres or 5,280 feet.
Where KM to miles 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 KM to Miles step by step
- Enter the value in km (the starting unit).
- Multiply by 0.6213712, because 1 km = 0.6213712 mi.
- The product is the value in mi. To go back, divide by 0.6213712 or multiply by 1.609344.
Popular length conversions
How to read your KM to Miles result
Quick estimate: multiply by about 0.62 to get miles from KM; this is within 0.3% 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.
| KM | MILES |
|---|---|
| 1 | 0.6213712 |
| 2 | 1.242742 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.42742 |
| 50 | 31.06856 |
| 100 | 62.13712 |
| 1,000 | 621.3712 |
Miles to KM: quick table
| MILES | KM |
|---|---|
| 1 | 1.609344 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 250 | 402.336 |
| 500 | 804.672 |
Common mistakes when calculating KM to Miles
- Confusing statute miles (1,609.344 m) with nautical miles (exactly 1,852 m).
- Dividing when you should multiply: from km to mi multiply by 0.6213712; from mi to km divide by 0.6213712.
KM to Miles FAQ
How many mi are in 1 km?
1 km equals 0.6213712 mi.
How many km are in 1 mi?
1 mi equals 1.609344 km.
Is 1 km = 0.6213712 mi an exact conversion?
Yes. The kilometer and the mile are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 0.6213712 is just that ratio shown to 7 significant figures.
What is a mile (mi)?
The international statute mile, exactly 1,609.344 metres or 5,280 feet.
How can I estimate KM to miles in my head?
Quick estimate: multiply by about 0.62 to get miles from KM; this is within 0.3% of the exact factor.
What is 250 km in miles?
250 km = 155.3428 mi (since 250 × 0.6213712).
What is 7 km in miles?
7 km = 4.349598 mi (since 7 × 0.6213712).
What is 40 km in miles?
40 km = 24.85485 mi (since 40 × 0.6213712).
How many decimals should I keep when converting km to mi?
Match the precision of your original measurement. For example, 6.213712 mi rounds to 6.21 mi at 3 significant figures; keep more digits only for engineering or scientific work.
More in Length converters
- KM to Feet Converter
- Meters to CM Converter
- KM to CM Converter
- Meters to Feet Converter
- Inches to Yards Converter
- Meters to Inches Converter
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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