Kilometers to Miles

Kilometers and miles are both units for measuring distance, but they are based on different measurement systems. The number 0.621371 is the conversion factor because 1 kilometer is equal to about 0.621371 miles, so multiplying by this factor changes the distance into the mile unit while keeping the same length.

Use this conversion when reading travel distances, road signs, running or cycling routes, or any problem that gives a distance in kilometers but asks for miles. It is especially useful when comparing metric distances with imperial-unit references.

• multiplying by 1.60934 instead of 0.621371 when converting km to miles
• forgetting that the result should be an approximate value, not an exact one
• mixing up kilometers and miles in the final unit label