How do you convert km/h to mph?
Multiply km/h by approximately 0.621371 to get mph (exact factor: 1 mph = 1.609344 km/h, so mph = km/h ÷ 1.609344).
Detailed answer
Kilometers per hour and miles per hour both measure distance per hour; they differ only by the length of the mile versus the kilometer. Since 1 international mile = 1.609344 km, speed in mph equals speed in km/h divided by 1.609344. The reciprocal 0.621371… is convenient for mental estimates.
Relationship context
Road speeds and vehicle specs switch between metric and US/UK customary units; aviation often uses knots, but car culture still uses mph in several countries.
Quick conversion table
| Kilometer per Hour (kph) | Mile per Hour (mph) |
|---|---|
| 0.1 | 0.0621371192 |
| 1 | 0.6213711922 |
| 2 | 1.2427423845 |
| 3 | 1.8641135767 |
| 4 | 2.485484769 |
| 5 | 3.1068559612 |
| 6 | 3.7282271534 |
| 7 | 4.3495983457 |
| 8 | 4.9709695379 |
| 9 | 5.5923407301 |
| Kilometer per Hour (kph) | Mile per Hour (mph) |
|---|---|
| 10 | 6.2137119224 |
| 20 | 12.4274238447 |
| 30 | 18.6411357671 |
| 40 | 24.8548476895 |
| 50 | 31.0685596119 |
| 60 | 37.2822715342 |
| 70 | 43.4959834566 |
| 80 | 49.709695379 |
| 90 | 55.9234073014 |
| 100 | 62.1371192237 |
More Kilometer per Hour converters
Dedicated pages from Kilometer per Hour to every other hub speed unit (m/s, km/h, mph, knots, ft/s, Mach, Beaufort, c).
- kph to mps (Kilometer per Hour to Meter per Second)
- kph to kmps (Kilometer per Hour to Kilometer per Second)
- kph to mph (Kilometer per Hour to Mile per Hour)
- kph to knots (Kilometer per Hour to Knot)
- kph to fpm (Kilometer per Hour to Foot per Minute)
- kph to fps (Kilometer per Hour to Feet per Second)
- kph to ips (Kilometer per Hour to Inch per Second)
- kph to cms (Kilometer per Hour to Centimeter per Second)
- kph to mms (Kilometer per Hour to Millimeter per Second)
- kph to mach (Kilometer per Hour to Mach)
- kph to beaufort (Kilometer per Hour to Beaufort)
- kph to c (Kilometer per Hour to Speed of light (c))