Miles per Hour to Kilometers per Hour (mph to km/h)
Multiply miles per hour by 1.609344 to get kilometers per hour, the same factor used to turn miles into kilometers. 60 mph is 96.6 km/h and 70 mph is 112.7 km/h. Type a speed into either field.
Convert mph to km/h
Result
mph to km/h
60 mph = 96.5606 km/h
1 mph = 1.60934 km/h · 1 km/h = 0.621371 mph
Show the mathHow it was calculated
km/h = mph × 1.609344
Uses exact legal definitions; results are rounded to 6 significant figures for display.
How to convert mph to km/h
km/h = mph × 1.609344
One mile per hour is exactly 1.609344 kilometers per hour, so multiply by 1.609344.
Worked example: converting 60 mph:
- km/h = mph × 1.609344
- 60 mph × 1.609344 = 96.5606 km/h
Mph to km/h conversion table
Common values, each computed with the exact formula and rounded to 6 significant figures.
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 mph | 1.60934 km/h |
| 3 mph | 4.82803 km/h |
| 5 mph | 8.04672 km/h |
| 6 mph | 9.65606 km/h |
| 7 mph | 11.2654 km/h |
| 8 mph | 12.8748 km/h |
| 10 mph | 16.0934 km/h |
| 12 mph | 19.3121 km/h |
| 15 mph | 24.1402 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 35 mph | 56.327 km/h |
| 40 mph | 64.3738 km/h |
| 45 mph | 72.4205 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.607 km/h |
| 70 mph | 112.654 km/h |
| 75 mph | 120.701 km/h |
| 80 mph | 128.748 km/h |
| 85 mph | 136.794 km/h |
| 90 mph | 144.841 km/h |
| 100 mph | 160.934 km/h |
| 120 mph | 193.121 km/h |
| 150 mph | 241.402 km/h |
| 200 mph | 321.869 km/h |
Quick reference: everyday miles per hour in kilometers per hour
Brisk walking pace
3.5 mph = 5.6327 km/h
Treadmill 10-minute-mile pace
6 mph = 9.65606 km/h
Common US school-zone or residential limit
25 mph = 40.2336 km/h
Common US highway limit
55 mph = 88.5139 km/h
UK motorway limit
70 mph = 112.654 km/h
Round 100 mph
100 mph = 160.934 km/h
Speed limits in mph and km/h
The US and the UK post speed limits in mph, while Canada, Mexico, Ireland and continental Europe use km/h. Common US limits convert to awkward metric numbers: 25 mph is 40.2 km/h, 55 mph is 88.5 km/h and 65 mph is 104.6 km/h. The UK motorway limit of 70 mph is 112.7 km/h. Wales lowered its default limit on most residential roads to 20 mph (32.2 km/h) in 2023.
If you're driving a US car in Canada, the speedometer usually has a smaller km/h scale inside the mph one. A 100 km/h limit corresponds to 62 mph. For distances, the miles to km converter uses the same factor.
Treadmills, running pace and cycling speed
US treadmills show speed in mph, and the rest of the world's in km/h. 6 mph is a 10:00 mile pace, and it converts to 9.66 km/h, or a pace of 6:13 per kilometer. 8 mph is 12.87 km/h, or 4:40 per kilometer. To turn speed into pace, divide 60 by the speed to get minutes per unit of distance.
Cycling speeds work the same way. A 15 mph average is 24.1 km/h, and a 20 mph group ride is 32.2 km/h. If you want calories burned at a given speed, the calories calculator works from your activity level rather than speed.
Frequently asked questions
Is there a quick mental conversion from mph to km/h?
Multiply by 1.6, or add 60% of the number to itself. For 50 mph: 50 + 30 = 80 km/h, against an exact 80.47 km/h. The shortcut runs about 0.6% low, which is less than a speedometer's normal error. To go the other way, multiply km/h by 0.6 and add a little, or use the km/h to mph converter.
How do knots compare with mph and km/h?
A knot is one nautical mile per hour, exactly 1.852 km/h or about 1.151 mph. Boats, aircraft and marine weather forecasts use knots. A 20-knot wind is 37 km/h, or 23 mph. To convert knots to km/h, multiply by 1.852. To get mph, multiply by 1.15078.
How do I convert mph to meters per second?
Multiply mph by 0.44704, the exact number of meters per second in one mile per hour. 60 mph is 26.8 m/s. Physics problems and wind-turbine specs often use m/s. Going via km/h works too: convert mph to km/h, then divide by 3.6.