km/h to mph Converter
Convert kilometers per hour (km/h) to miles per hour (mph) as you type — 1 km/h = 0.621371 mph. Switch units, change the precision or copy the result.
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How to use this tool
Steps for using the Unit Converter.
- Enter a value in From — kilometers per hour are already selected.
- The result in miles per hour appears instantly. Change either unit to convert to anything else in speed.
- Use the swap button for the reverse conversion, and set the decimal places you need.
- Turn on Show formula to see the calculation, then copy or share the result.
Example
1 km/h to mph
1 km/hmph = 1 ÷ 1.609344 = 0.621371 mphCommon use cases
- Speed limits and speedometers when driving abroad.
- Running and cycling paces.
- Wind speeds and boat or aircraft speeds in knots.
km/h to mph conversion table
| Kilometer per hour (km/h) | Mile per hour (mph) |
|---|---|
| 0.1 km/h | 0.062137 mph |
| 0.5 km/h | 0.310686 mph |
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.242742 mph |
| 3 km/h | 1.864114 mph |
| 4 km/h | 2.485485 mph |
| 5 km/h | 3.106856 mph |
| 10 km/h | 6.213712 mph |
| 15 km/h | 9.320568 mph |
| Kilometer per hour (km/h) | Mile per hour (mph) |
|---|---|
| 20 km/h | 12.427424 mph |
| 25 km/h | 15.53428 mph |
| 50 km/h | 31.06856 mph |
| 75 km/h | 46.602839 mph |
| 100 km/h | 62.137119 mph |
| 250 km/h | 155.342798 mph |
| 500 km/h | 310.685596 mph |
| 1,000 km/h | 621.371192 mph |
Values rounded to 6 decimal places.
Related conversions
The units
- Kilometer per hour (km/h)
- 1,000 m in 3,600 s. Part of the Metric system.
- Mile per hour (mph)
- 1 mi in 1 h = exactly 0.44704 m/s. Part of the US customary system.
How to convert kilometers per hour to miles per hour
Speed limits and car speedometers: 100 km/h, a common motorway limit, is about 62 mph.
To convert kilometers per hour to miles per hour, use mph = km/h ÷ 1.609344. One kilometer per hour equals 0.621371 miles per hour, and one mile per hour equals 1.609344 kilometers per hour.
Kilometer per hour (km/h): 1,000 m in 3,600 s. Mile per hour (mph): 1 mi in 1 h = exactly 0.44704 m/s.
For the opposite direction, use the mph to km/h converter. All speed units are on the speed converter.
Limitations
- Results are rounded to the decimal places you choose; the calculation itself keeps full precision.
Frequently asked questions
How many miles per hour are in a kilometer per hour?
1 km/h = 0.621371 mph. Multiply kilometers per hour by 0.6213711922 (or use mph = km/h ÷ 1.609344).
How do I convert kilometers per hour to miles per hour?
Use mph = km/h ÷ 1.609344. For example, 1 km/h = 0.6214 mph and 10 km/h = 6.2137 mph.
How do I convert km/h to mph quickly?
Divide by 1.609 — or multiply by about 0.62. 100 km/h ≈ 62.1 mph.
How do I convert m/s to km/h?
Multiply by exactly 3.6: 10 m/s = 36 km/h.