Enter a Speed
Miles and kilometers per hour, meters or feet per second, and knots.
In All Units
| Unit | Value |
|---|
About this speed converter
Miles per hour are used on the roads of the United States and the United Kingdom, while most of the world drives with kilometers per hour. Science and sport often use meters per second, aviation and sailing use knots, and U.S. ballistics and HVAC specs still quote feet per second.
This converter translates a speed into every common unit at once. The exact relations are: 1 mph = 1.609344 km/h, 1 m/s = 3.6 km/h, 1 ft/s = 0.3048 m/s and 1 knot = 1.852 km/h exactly.
In the US, everyday speed questions usually start in mph — a 70 mph interstate, a 55 mph truck limit, a 30 mph school zone. Elsewhere in the world the same questions start in km/h, and running, cycling and weather forecasts bring m/s into the picture. Boaters and pilots then add knots, where 1 knot = 1 nautical mile per hour. Keep this page open and any of those converts to the others instantly.
Everyday speed conversions
| This speed | Equals | Where you meet it |
|---|---|---|
| 60 mph | 96.56 km/h | Typical U.S. rural highway limit |
| 70 mph | 112.65 km/h | U.S. interstate limit in many states |
| 100 km/h | 62.14 mph | Standard limit across Europe and most of the world |
| 50 km/h | 31.07 mph | Typical city street limit |
| 10 m/s | 36 km/h | Top sprint speed; strong wind |
| 1 kn | 1.852 km/h | One nautical mile per hour |
How the units relate
All speed units are fixed ratios of distance over time, so conversion is a single multiplication. A kilometer is 0.621371 miles, which is why 100 km/h is 62.14 mph and a U.S. 65 mph limit is about 104.6 km/h.
A knot is one nautical mile per hour — 1.852 km/h exactly — because a nautical mile is one minute of latitude, which makes knots convenient for navigation.
How to convert a speed
- Type the value: Enter any speed, for example a road limit or a running pace.
- Pick the unit it is in: Choose mph, km/h, m/s, ft/s or knots as the source unit.
- Read every equivalent: The table shows the same speed in all five units instantly.
FAQ
How many km/h is 60 mph?
60 mph is 96.56 km/h. Multiply miles per hour by 1.609344 to get kilometers per hour.
Why does the U.S. use mph?
The United States keeps the customary mile system for road signs, so speed limits are posted in mph. Cars sold there show mph as the primary unit, usually with km/h alongside.
What is a knot?
A knot is one nautical mile per hour — exactly 1.852 km/h or about 1.151 mph. It is used in aviation and marine navigation because the nautical mile matches one minute of latitude.
Is 100 km/h faster than 60 mph?
No. 60 mph is 96.56 km/h, so 100 km/h is slightly faster — about 62.1 mph.