80 Miles per hour to Kilometres per hour (80 mph to km/h)

Formula and worked answer

km/h = mph × 1.609344

Substituting 80 for mph: 80 × 1.609344 = 128.7475 km/h. The factor 1.609344 comes from the exact international definition of the Mile per hour relative to the Kilometre per hour, so this answer is precise rather than rounded.

What does 80 Miles per hour represent?

80 mph (128.75 km/h) is the highest US interstate highway speed limit posted in sparsely populated western states like Texas, Utah, and Wyoming and the round figure US police speed-enforcement guidance flags as the threshold for "reckless driving" charges in many other states. Converted to metric the figure is 128.75 km/h, which European autobahn-network operators (in Switzerland and parts of Italy) post as 130 km/h on equivalent road sections. The 1.25 km/h gap is small enough that the two limits are practically equivalent, but US drivers in Texas habituated to "80 mph" sit just under the European 130 km/h cap by about 1%, which is the speed-enforcement noise floor.

Values near 80 mph

• 75 mph=120.7008 km/h
• 76 mph=122.3101 km/h
• 77 mph=123.9195 km/h
• 78 mph=125.5288 km/h
• 79 mph=127.1382 km/h
• 81 mph=130.3569 km/h
• 82 mph=131.9662 km/h
• 83 mph=133.5756 km/h
• 84 mph=135.1849 km/h
• 85 mph=136.7942 km/h

mph to km/h reference table around 80

Convert a different value

Looking for a different number of Miles per hour? Use the full mph to km/h converter to enter any value, see the worked formula, and read the full background on the Mile per hour and the Kilometre per hour. To go the other direction, the km/h to mph converter applies the inverse factor and is the page to bookmark if you usually start in Kilometres per hour.