Speed Converter
Speed, distance and time calculator: find average speed, distance traveled or travel time in mph, km/h, m/s or knots.
How to use this calculator
- Type the value you want to convert.
- Choose the unit you are converting from and the one you want.
- Read the result, or the full table of equivalent units below.
Average speed is distance divided by time, v = d/t. Rearranged, distance is d = v·t and time is t = d/v.
Mix any units: miles and minutes, kilometers and hours, meters and seconds. The result can be shown in mph, km/h, m/s, knots or ft/s.
Conversion formula
1 mph = 1.60934 km/h · 1 km/h = 0.621371 mph
Common conversions: mile per hour → kilometer per hour
| mph | km/h |
|---|---|
| 1 mph | 1.60934 km/h |
| 2 mph | 3.21869 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 50 mph | 80.4672 km/h |
| 100 mph | 160.934 km/h |
| 1 000 mph | 1 609.34 km/h |
Frequently asked questions
How long does it take to drive 300 miles at 60 mph?
t = d/v = 300 mi ÷ 60 mph = 5 hours.
Is this average or instantaneous speed?
Average speed over the whole trip. Instantaneous speed is the reading at one moment, such as a speedometer.