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The formula for this conversion is as follows: MPH x 1.609344 = KPH To find the MPH when you know the KPH use the following formula: divide KPH by 1.609344
1 mph = 1.609344 kphSo just multiply your speed in mph by 1.6 (or you can use more decimal places to get a more accurate answer).so for example, 55 mph x 1.6 = 88 kph
Use this formula:m/sec x 3.6 = kph
Multiply mph by 1.609 to get km/h.For a quick mental calculation, multiply mph by one and a half. Using this method, 60 mph -> 90 km/h (where the exact conversion would be 96.56 km/h).If you have your speed in km/h and want mph, divideinstead of multiplying.You can also type the conversion directly into some search engines like Google. For example "80 mph to km/h".
Use this formula:meters per second x 2.237 = mph 1.62 x 2.237 = about 3.6 mph