Convert kilometer per hour to mile per hour
1 km/h = 0.6213711922 mph
sig figs
100 km/h = 62.1 mph
100 km/h in every speed unit
| millimeter per year | 877,000,000,000 mm/yr |
| millimeter per day | 2,400,000,000 mm/day |
| millimeter per hour | 100,000,000 mm/h |
| inch per day | 94,500,000 in/day |
| foot per day | 7,870,000 ft/d |
| inch per hour | 3,940,000 in/h |
| meter per day | 2,400,000 m/d |
| millimeter per minute | 1,670,000 mm/min |
| meter per hour | 100,000 m/h |
| inch per minute | 65,600 in/min |
| millimeter per second | 27,800 mm/s |
| foot per minute | 5,470 ft/min |
| centimeter per second | 2,780 cm/s |
| meter per minute | 1,670 m/min |
| inch per second | 1,090 in/s |
| kilometer per hour | 100 km/h |
| foot per second | 91.1 ft/s |
| mile per hour | 62.1 mph |
| knot | 54 kn |
| meter per second | 27.8 m/s |
| mach (sea level) | 0.0816 Ma |
| kilometer per second | 0.0278 km/s |
| speed of light | 9.27e-08 c |
How the conversion works
Multiply by 0.6213711922 to go from kilometer per hour to mile per hour, or divide by it to go back. Every conversion on this site routes through the SI value (m/s) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? mile per hour to kilometer per hour: 1 mph = 1.609344 km/h.
kilometer per hour to mile per hour: common values
| 1 km/h | 0.62137119 mph |
| 2 km/h | 1.2427424 mph |
| 3 km/h | 1.8641136 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.2137119 mph |
| 15 km/h | 9.3205679 mph |
| 20 km/h | 12.427424 mph |
| 25 km/h | 15.53428 mph |
| 50 km/h | 31.06856 mph |
| 75 km/h | 46.602839 mph |
| 100 km/h | 62.137119 mph |
| 250 km/h | 155.3428 mph |
| 500 km/h | 310.6856 mph |
| 1000 km/h | 621.37119 mph |
Other speed conversions
m/s → mphkm/h → m/skm/h → ft/skm/h → knkm/h → ft/minft/s → mphkn → mphft/min → mph