55 Miles per Hour to Kilometers per Hour
Result
55 mph = 88.5138 km/h
55 mph = 88.5138 km/h
How to Convert miles per hour to kilometers per hour
To convert miles per hour to kilometers per hour, multiply the value by the conversion factor:
Reverse: 88.5138 kilometers per hour = 55 miles per hour
Reverse: 88.5138 kilometers per hour = 55 miles per hour
kilometers per hour to miles per hour converterAbout These Units
miles per hour (mph)
Miles per hour (mph) is the standard speed unit for the United States and United Kingdom. It has been used since the days of stagecoaches but became codified with the rise of the automobile and the need for speed limits. Despite metrication efforts, the UK retains mph for its roads, keeping it aligned with the US system.
US highway speeds are typically 65-75 mph.
Commonly used in: US & UK Speed limits, Baseball pitch speeds, Tennis serve speeds, Hurricane wind speeds (US), NASCAR.
kilometers per hour (km/h)
Kilometers per hour (km/h) is the standard unit for speed limits and car speedometers in almost every country except the US and UK. It gained dominance as the metric system spread in the 20th century. Even in the UK, which uses mph on signs, car speedometers must also show km/h.
Highway speed limits are often 100-130 km/h.
Commonly used in: Speed limits (Global), Car speedometers, High-speed trains, Bicycle computers, Weather reports (some countries).