The formula to convert kph to mph is mph = 0.621371 x kph. The resulting figure indicates the number of miles traveled by an object in an hour.
Kilometers per hour is a measurement of speed in the metric, or SI, system, a decimalbased system of measurement units. According to the National Institute of Standards and Technology, the United States is one of the few industrial countries that has not completely migrated to the metric system for all its measurements. However, converting between the metric system and older units, such as mph, is simple. Besides using formulas, there are numerous online converters or apps for more convenient calculations.
kph x 0.621 = mph.
http://wiki.answers.com/Q/What_is_the_formula_for_...

1. Multiply the speed in mph by 1.609344 km per mile. For example, 55 mph is 88.51392 kph. For most practical intents, multiplying by 1.6 is accurate enough. 2. Convert from kph to
http://www.ehow.com/how_2306811_convertmphkph.ht...

Mph X 1.609344 = Kph. Kph / 1.609344 = Mph.
http://answers.yahoo.com/question/index?qid=200606...

228 KPH equals 141.67 MPH, you might need to slow down there!
http://www.chacha.com/question/whatis228kphconv...
