Question 1

How many km is 1 mile?

Accepted Answer

1 mile = 1.609344 km exactly. So 5 miles = 8.05 km, 10 miles = 16.09 km, 26.2 miles (a marathon) = 42.19 km.

Question 2

How many miles is 1 km?

Accepted Answer

1 km = 0.621371 miles. So 5 km = 3.11 miles, 10 km = 6.21 miles, 42.2 km (a marathon) = 26.22 miles.

Question 3

How do I convert miles to km in my head?

Accepted Answer

Multiply miles by 1.6 for a rough result — or multiply by 8 and divide by 5. For example, 10 miles × 8 = 80, ÷ 5 = 16 km. The exact figure is 16.09 km, so this is very close.

Question 4

Why does the UK use miles for road distances?

Accepted Answer

The UK uses miles for road signs and speed limits despite metrication in most other areas. Miles are embedded in UK law and infrastructure — the Road Traffic Act specifies speed limits in mph. Kilometres appear in some scientific, sporting and European contexts.

Question 5

How many km is 5 miles?

Accepted Answer

5 miles = 8.047 km. This is a very common running distance — a "5 miler" is just over 8K in metric.

Question 6

How many miles is 5 km?

Accepted Answer

5 km = 3.107 miles. Parkrun is 5 km — that's just over 3.1 miles. A 10K race is 6.21 miles, a half-marathon is 13.1 miles (21.1 km).

Question 7

How many miles is 100 km?

Accepted Answer

100 km = 62.14 miles. This is a common distance for European road trips and ultra-endurance events. The UK's Land's End to John o'Groats is approximately 874 miles (1,407 km) by road.

Miles to Km Converter — Convert Miles to Kilometres (UK)