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
1 km/h is 0.621371192 mph
156 mph is 251.058 kmph
I assume you mean 27km/h. This is 16.777mph
228 kmph is 141.673 mph
207 kmph is 128.624 mph
290 kmph is 180.198 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.
75 mph = 120.7008 kmph 60 mph= aprox 100 kmph
51.499 kmph
3 mph = 4.83 kmph
622.12554 mh-1