How many kilometers are in a mile?

1 mi = 1.6093 km. To convert any amount, multiply by 1.6093.

How do you convert miles to kilometers?

Multiply the number of miles by 1.6093 to get kilometers. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Length

Miles to kilometers converter

Convert miles (mi) to kilometers (km). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert miles to kilometers— the formula

Miles convert to kilometers by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

km = mi × 1.6093

mi = km × 0.621371

SI base unit (BIPM). US customary lengths from the 1959 international yard agreement: 1 yd = 0.9144 m exactly, 1 in = 25.4 mm exactly, 1 mi = 1609.344 m exactly.

Questions

Frequently asked questions

How many kilometers are in a mile?
1 mi = 1.6093 km. To convert any amount, multiply by 1.6093.
How do you convert miles to kilometers?
Multiply the number of miles by 1.6093 to get kilometers. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.