How do you convert mph to km/h?
Multiply mph by approximately 1.60934 to get km/h (exact: 1 mph = 1.609344 km/h). To go from km/h to mph, divide by 1.609344.
Detailed answer
Miles per hour and kilometers per hour are both “distance per hour” with different mile definitions. The international mile is exactly 1.609344 km, so the speed scales by that same factor.
Relationship context
US/UK road signs and vehicle gauges often use mph; most of the world uses km/h, so cross-border travel and import specs need this conversion.
Quick conversion table
| Mile per Hour (mph) | Kilometer per Hour (kph) |
|---|---|
| 0.1 | 0.1609344 |
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 4 | 6.437376 |
| 5 | 8.04672 |
| 6 | 9.656064 |
| 7 | 11.265408 |
| 8 | 12.874752 |
| 9 | 14.484096 |
| Mile per Hour (mph) | Kilometer per Hour (kph) |
|---|---|
| 10 | 16.09344 |
| 20 | 32.18688 |
| 30 | 48.28032 |
| 40 | 64.37376 |
| 50 | 80.4672 |
| 60 | 96.56064 |
| 70 | 112.65408 |
| 80 | 128.74752 |
| 90 | 144.84096 |
| 100 | 160.9344 |
More Mile per Hour converters
Dedicated pages from Mile per Hour to every other hub speed unit (m/s, km/h, mph, knots, ft/s, Mach, Beaufort, c).
- mph to mps (Mile per Hour to Meter per Second)
- mph to kmps (Mile per Hour to Kilometer per Second)
- mph to kph (Mile per Hour to Kilometer per Hour)
- mph to knots (Mile per Hour to Knot)
- mph to fpm (Mile per Hour to Foot per Minute)
- mph to fps (Mile per Hour to Feet per Second)
- mph to ips (Mile per Hour to Inch per Second)
- mph to cms (Mile per Hour to Centimeter per Second)
- mph to mms (Mile per Hour to Millimeter per Second)
- mph to mach (Mile per Hour to Mach)
- mph to beaufort (Mile per Hour to Beaufort)
- mph to c (Mile per Hour to Speed of light (c))