How many kilometers does 80 mph run in one hour?

[StAurora]

Car speed of 80 mph is 80 km/h. So running for one hour would be 80 kilometers. 'Mph' is a foreign unit that has been colloquialized in China. Introduction to 'Mph': 'Mph' is a British length unit, approximately equal to 0.9144 meters. Due to people's colloquial habit of omitting the 'per hour' part, it is also used as a speed unit. Car speed is calculated in metric units of kilometers. When British people say 100 mph, it equals 160 kilometers per hour, so 80 mph abroad means 50 mph. Unit conversion: 1 mph (Chinese colloquial) = 1 kilometer (/hour) 1 mph (British unit) = 0.9144 meters (meters, not kilometers) 1 mile = 1.609344 kilometers Origin of car speed units: Cars originated from foreign countries. The original speed measurement unit was the mile, and speedometers in cars were also marked with miles. At that time, most people were not familiar with English. When they heard the term 'mile,' they didn't know what it meant. They only knew it referred to the car's speed. To make it easier for the general public to understand, 'mile' was transliterated as 'mph.' Thus, it became a unit for measuring car speed. In other words, 'mph' is a loanword for 'mile,' meaning mile.

[Tess]

Actually, many car enthusiasts confuse the concept of 'yard.' Internationally, 1 yard equals 0.914 meters, so 80 yards converts to roughly 73 meters per minute. However, when we Chinese say 80 yards, we actually mean 80 kilometers per hour. I always pay close attention to this distinction while driving, as speeding can lead to fines. It's safest to focus on the km/h marking on the dashboard—that 'h' inside a circle is the official unit for speed. The conversion is straightforward: when the dashboard displays 80, the actual speed is 80 kilometers per hour, which means covering 1.3 kilometers every minute.

[JulianaLee]

I love studying speed algorithms when driving on highways. '80 ma' means 80 kilometers per hour, where 'ma' is a commonly used colloquial term. Converted to specific numbers, maintaining a constant speed of 80 ma per hour allows you to cover 80 kilometers. For example, the entire Shanghai-Nanjing Expressway is less than 300 kilometers, so maintaining this speed would take less than four hours to complete. Driving at this speed in the city would be considered speeding. Last time, I saw a novice driver mistakenly treating '80 ma' as '80 mph,' causing the dashboard needle to hit the red zone at 130 km/h.

[SophiaLynn]

80 mph colloquially means 80 kilometers per hour. I have a simple calculation method: when driving on the highway with navigation on my phone, the dashboard shows 80 mph while the navigation displays a speed of exactly 79 to 81 km/h. I remember the mechanic mentioned during the first maintenance of my new car that the '80 mph' often referred to by experienced drivers actually exceeds the speed limit by about 3%, because the actual speed is slightly slower than what the dashboard shows. Last time on the Shenhai Expressway, I tested it with cruise control set at 80 mph, and after half an hour, the road sign showed I had traveled 39.8 kilometers, which basically matches the theoretical value.