400 km = 248.55 miles (rounded)
km is a measurement of distance and mph is a measure of velocity. However 1 mph =1.609344 kph (km per hour) so 400 mph = 400 * 1.609344 = 643.7376 kph
320 Km/h = 198.838782 M/h
400 kph = 248.55 mph
5 kph = 3.11 mph
136.7 mph is 220 kph.
272 kph is 169 mph.
265 mph = 426.5 kph
27.3 mph = 43.94 kph
285 kph = 177.1 mph
256,000 kph = 159,071 mph
87 kph = 54.06 mph.
12 kph = about 7.5 mph.