Miles to Kilometers Converter
Convert miles to kilometers and vice versa instantly. Essential for international travel, understanding road distances, comparing running/marathon distances, and working with foreign maps. Works both directions—enter a distance in miles or kilometers and instantly see the conversion.
Miles to Kilometers Converter
How the Calculation Works
Formula: kilometers = miles × 1.60934
Reverse Formula: miles = kilometers ÷ 1.60934
One mile equals exactly 1.609344 kilometers. This is the international standard conversion.
Worked Example
Examples:
- 1 mile ≈ 1.61 km
- 10 miles ≈ 16.1 km
- 100 miles ≈ 160.9 km
- 1 km ≈ 0.62 miles
- 5 km ≈ 3.1 miles
How to Use This Calculator
When You Need This: International travel (distances in km outside USA), driving speeds (km/h vs mph), running distances, and understanding international maps. Useful for comparing prices per unit distance.
Quick Estimate: To roughly convert miles to km, multiply by 1.6. To convert km to miles, divide by 1.6 or multiply by 0.625.
Frequently Asked Questions
How do I convert miles to kilometers?
Multiply miles by 1.609. Example: 10 miles × 1.609 = 16.09 kilometers.
How do I convert kilometers to miles?
Divide kilometers by 1.609 (or multiply by 0.621). Example: 10 km ÷ 1.609 ≈ 6.21 miles.
What's a quick mental conversion?
Use 1.6 to convert miles to km, or divide km by 1.6 for a quick estimate. It's not exact but close enough for most purposes.
Why the difference?
The US uses miles (imperial system) while most countries use kilometers (metric system). The conversion is a fixed ratio.