**To convert 85 mph to kph, you first need to convert miles to kilometers, and then multiply 85 by the ratio of miles to kilometers** When multiplied out via the conversion process, 85 mph is equal to 136.765 kph.

**Convert miles to kilometers**According to About.com, 1 mile is equal to 1.609 kilometers. Therefore, convert 1 mile to kilometers by multiplying by 1.609.

**Multiply 85 by 1.609 to get the corresponding number of kilometers**Multiply 85 by 1.609. The answer is 136.765. There are 136.765 kilometers for every 85 miles.

**Replace 85 miles with 136.765 kilometers to get the corresponding speed in kph**Since 85 miles equals 136.765 kilometers and the time does not change, 85 mph is equal to 136.765 kph.