Mph to Kmh Converter
By using our calculators, you agree to our Terms of Use.
Convert mph to km/h (and back) instantly. Shared road factor 1.609344 km per mile — handy for driving abroad and reading international speed limits. Knots use a different factor (1.852 km/h).
Miles per hour
mph
Kilometers per hour
km/h
1 mph = 1.6093 km/h
Convert Miles per hour
Quick presets
Kilometers per hour
96.5606 km/h
60 mph = 96.5606 km/h
- 25 mph
- 40.2336 km/h
- 30 mph
- 48.2803 km/h
- 55 mph
- 88.5139 km/h
- 60 mph
- 96.5606 km/h
- 65 mph
- 104.61 km/h
- 70 mph
- 112.65 km/h
- 100 mph
- 160.93 km/h
Related calculators
Miles per hour vs km/h
Miles per hour (mph) appears on US and UK speed-limit signs and many US car dashboards. Kilometers per hour (km/h) is the standard almost everywhere else. Because both measure distance per hour, they share the same mile-to-kilometer factor: 1 mph = 1.609344 km/h exactly.
Worked example: a US highway limit of 70 mph is 70 × 1.609344 ≈ 112.7 km/h. Going the other way, a posted 100 km/h limit is about 62 mph — treating the “100” as mph is a common rental-car mistake.
Caveat: GPS apps can display a different unit than the road sign beside you. Wind and storm reports use the same conversion, but some marine and aviation forecasts use knots instead (1 knot ≈ 1.852 km/h), so confirm the unit before comparing numbers.
Round-trip sanity check: 65 mph × 1.609344 = 104.607 km/h; divide by 1.609344 to get 65 mph back. Treating “100” on a European sign as mph instead of km/h is a 61 mph error — convert the posted limit before driving.
Common questions
What is 70 mph on European speed limit signs?
70 mph is about 113 km/h. Many European highways allow 130 km/h (roughly 81 mph), but limits vary by country and road type — always follow local signage. Round-trip: 113 km/h ÷ 1.609344 ≈ 70.2 mph.
Does my car speedometer show both units?
Some US cars show a secondary km/h scale inside the mph dial. Rental cars abroad usually default to km/h. GPS speed readouts often follow app settings, not the car dial.
How do I avoid speeding tickets when switching between mph and km/h?
Convert the posted limit before you drive. A common mistake is treating “100” as mph when the sign means 100 km/h (about 62 mph). Set your GPS to display the local unit. Round-trip: 65 mph × 1.609344 ≈ 104.6 km/h.
Are wind speeds in weather reports converted the same way?
Yes — the same factor applies because both use distance per hour. US hurricanes may quote mph; international forecasts often use km/h or knots (1 knot ≈ 1.852 km/h). Round-trip: 100 km/h ÷ 1.609344 ≈ 62.1 mph.