1 mile is 1.62 kilometers. With this in mind, one mile per hour is the same as 1.62 kilometers per hour. With this you can easily count how many miles per kilometer something is (multiply the amount of miles with 1.62)
1 mile = 1.6 km Hence 143 kmph = 89.375 mph
228 kmph is 141.673 mph
207 kmph is 128.624 mph
Remember that there are more KMPH than there is in MPH. One KMPH = nearly .61 MPH, so 61 MPH = 100 KMPH so 150 MPH should = roughly 241.5 KMPH.
51.499 kmph
75 mph = 120.7008 kmph 60 mph= aprox 100 kmph
622.12554 mh-1
45 mph is 72.4205 kmph
64 kmph equates to 39.7678 mph
93 kmph equates to 57.7875 mph
154 mph is equal to 247.839 km/hr. 1 mph = 1.60934 km/hr.
90 kmph = 56 mph