What is 30 kilometers per hour in miles per hour? 20 miles/hour to km/hour = 32.18688 km/hour. When we take this logic of movement forward we come to the world of time and distance. Something traveling at one kilometer per hour is traveling about 0.278 meters per second, or about 0.621 miles per hour. The universe also is moving around the sun and the universe is also in orbit. Among the fastest animals in the sea is the black marlin, … There are 2 units of measurement, namely MPH (miles per hour) and km/h (kilometres per hour) used by different countries all over the world to set speed limits and you need to know which country uses MPH and which uses km/h before you hit the road. A mile per hour is a unit of speed commonly used in the United States. Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States … Solution: Formula: mph * 1.609344 = kmph Calculation: While we use them quite regularly, we need to know what exactly the history is behind this. On the other hand one mile is equal to 1.609 kilometers. A kilometer per hour is a unit of speed. The nominal maximum speed limits in these zones are 30 kilometres per hour (19 mph) and 20 miles per hour (32 km/h) respectively. The myth about speed and human endurance took some time die down. 50 miles/hour to km/hour = 80.4672 km/hour. Miles per hour to Kilometers per hour formula Kilometers per hour. 40 miles to km = 64.37376 km. 1 mile is equal to 1.609344 kilometers: 1 mi = 1.609344 km. The final formula to convert 30 MPH to KMH is: [KMH] = 30 x 1.61 = 48.3. 25 miles/hour to km/hour = 40.2336 km/hour. ››. Definition: In relation to the base unit of [speed] => (meters per second), 1 Miles Per Hour (mi/h) is equal to 0.44704 meters-per-second, while 1 Kilometers Per Hour (km/h) = 0.277778 meters-per … minute per kilometer . In this case we should multiply 30 Kilometers/Hour by 0.62137119223783 to get the equivalent result in Miles/Hour: … 1 kilometer is equal to 0.6213 miles and this method of time and distance is also used.