Miles Per Hour to Kilometers Per Hour (mph to km/h)
1 mph = 1.60934 km/h
and 1 km/h = 0.621371 mph
How to convert Miles Per Hour to Kilometers Per Hour
km/h = mph × 1.609344
To convert, multiply the number of miles per hour by 1.609344. Example: 10 mph × 1.609344 = 16.0934 km/h.
1 mph is exactly 1.609344 km/h, because 1 mile is exactly 1.609344 km.
Used for US and UK speed limits, car top speeds, wind speeds in forecasts and treadmill settings.
Mental shortcut: multiply by 1.6 (underestimates by about 0.6%).
Miles Per Hour to Kilometers Per Hour conversion chart
| Miles Per Hour | Kilometers Per Hour |
|---|---|
| 1 mph | 1.61 km/h |
| 2 mph | 3.22 km/h |
| 3 mph | 4.83 km/h |
| 4 mph | 6.44 km/h |
| 5 mph | 8.05 km/h |
| 6 mph | 9.66 km/h |
| 7 mph | 11.27 km/h |
| 8 mph | 12.87 km/h |
| 9 mph | 14.48 km/h |
| 10 mph | 16.09 km/h |
| 11 mph | 17.7 km/h |
| 12 mph | 19.31 km/h |
| 13 mph | 20.92 km/h |
| 14 mph | 22.53 km/h |
| 15 mph | 24.14 km/h |
| 16 mph | 25.75 km/h |
| 17 mph | 27.36 km/h |
| 18 mph | 28.97 km/h |
| 19 mph | 30.58 km/h |
| 20 mph | 32.19 km/h |
| 25 mph | 40.23 km/h |
| 30 mph | 48.28 km/h |
| 35 mph | 56.33 km/h |
| 40 mph | 64.37 km/h |
| 45 mph | 72.42 km/h |
| 50 mph | 80.47 km/h |
| Miles Per Hour | Kilometers Per Hour |
|---|---|
| 55 mph | 88.51 km/h |
| 60 mph | 96.56 km/h |
| 65 mph | 104.61 km/h |
| 70 mph | 112.65 km/h |
| 75 mph | 120.7 km/h |
| 80 mph | 128.75 km/h |
| 85 mph | 136.79 km/h |
| 90 mph | 144.84 km/h |
| 95 mph | 152.89 km/h |
| 100 mph | 160.93 km/h |
| 110 mph | 177.03 km/h |
| 120 mph | 193.12 km/h |
| 130 mph | 209.21 km/h |
| 140 mph | 225.31 km/h |
| 150 mph | 241.4 km/h |
| 160 mph | 257.5 km/h |
| 170 mph | 273.59 km/h |
| 180 mph | 289.68 km/h |
| 190 mph | 305.78 km/h |
| 200 mph | 321.87 km/h |
| 210 mph | 337.96 km/h |
| 220 mph | 354.06 km/h |
| 230 mph | 370.15 km/h |
| 240 mph | 386.24 km/h |
| 250 mph | 402.34 km/h |
Values rounded to 2 decimal places (4 below 1). Use the converter above for more precision.
Frequently asked questions
How many kilometers per hour are in 1 mile per hour?
1 mile per hour = 1.60934 kilometers per hour. 1 mph is exactly 1.609344 km/h, because 1 mile is exactly 1.609344 km.
How do I convert miles per hour to kilometers per hour?
Multiply the number of miles per hour by 1.609344. Example: 10 mph × 1.609344 = 16.0934 km/h.
Is there a quick way to estimate mph to km/h in your head?
Yes — multiply by 1.6. This underestimates by about 0.6%. Use the exact formula (km/h = mph × 1.609344) when precision matters.
How do I convert kilometers per hour back to miles per hour?
Use mph = km/h ÷ 1.609344 — divide the number of kilometers per hour by 1.609344. See the Kilometers Per Hour to Miles Per Hour page for a full chart.