Kilometres to Miles Calculator
Convert a distance in kilometres to statute miles and other common units. The conversion is exact: 1 international statute mile = 1.609344 km, a definition fixed since 1959.
km
Statute miles (international, exact conversion)
- 1
Miles per kilometre
1 ÷ 1.609344 = 0.621371Exact since 1959: 1 statute mile = 1.609344 km. - 2
Convert to miles
10 ÷ 1.609344 = 6.2137
How does this calculator work?
Divide kilometres by 1.609344 to get statute miles (1 mile = 1,609.344 m, defined exactly since 1959). For example, 10 km = 6.2137 miles. The calculator also shows metres, feet and nautical miles in one step.
Formula
How this is calculated
Since 1959 the international statute mile has been defined as exactly 1,609.344 metres, making the kilometre-to-mile conversion exact with no measurement error. Dividing any kilometre value by 1.609344 gives statute miles, multiplying by 1000 gives metres, dividing the metres by 0.3048 gives feet (also an exact definition), and dividing by 1.852 gives nautical miles (the nautical mile is exactly 1,852 metres).
The statute mile used here is the standard mile used in road distances in the United States and United Kingdom. The nautical mile, used in aviation and maritime navigation, is slightly longer (1,852 m vs 1,609.344 m), so nautical miles are always fewer than statute miles for the same distance.
All four conversions are exact arithmetic — no approximations are used — so the only variation between results is in how many decimal places the display rounds to.
Frequently asked questions
1 km = 0.621371 miles exactly (1 ÷ 1.609344). For a quick mental estimate, 5 km ≈ 3.1 miles, 10 km ≈ 6.2 miles.
Multiply the kilometres by 0.6214 (or use the fraction 5/8 as a rough approximation). For example, 8 km × 5/8 = 5 miles. The exact multiplier is 1 ÷ 1.609344 ≈ 0.621371.
Yes. The international statute mile has been defined as exactly 1,609.344 metres since 1959, so kilometres to miles is a purely arithmetic calculation with no measurement uncertainty.
Also known as
TG we-Calculate Editorial Team. (2026). Kilometres to Miles Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/kilometers-to-miles-calculator
TG we-Calculate Editorial Team. "Kilometres to Miles Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/kilometers-to-miles-calculator.
TG we-Calculate Editorial Team, "Kilometres to Miles Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/kilometers-to-miles-calculator
@misc{wecalculate_kilometers_to_miles_calculator, title = {Kilometres to Miles Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/kilometers-to-miles-calculator}}, year = {2026}, note = {TG we-Calculate} }
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