For example, 8 miles is about 13 kilometers. 13 miles is about the same as 21 kilometers. As Reddit user daneah explains, this is because the golden ratio (~1.618) is very close to the conversion ...

Therefore, a marathon is 26.2 miles instead of 42.195 kilometers. But at the same time, we still quantify shorter races, like 5Ks and 10Ks, in the metric system.

A popular goal among runners, breaking two hours for the half marathon – which is 13.1 miles or 21.1km – requires you to run at a pace of 9:10 min/mile, or 5:41 min/km.

Converting between kilometers and miles becomes effortless with these mental math tricks. Learn to quickly estimate distances for everyday scenarios, from understanding international content to ...

Depending on your current location, Google Maps may set your default measurement unit to kilometers or miles. However, if you have a preferred unit of measurement, you can set your default distance ...