Speed Converter
Convert kilometres per hour, miles per hour, metres per second, knots and feet per second.
About the Speed Converter
One mile per hour is exactly 0.44704 m/s, or 1.609344 km/h. A knot is one nautical mile (1,852 m) per hour, about 1.15 mph, and is used at sea and in aviation.
To turn m/s into km/h multiply by 3.6.
The formula
Result = Value × (size of the “from” unit ÷ size of the “to” unit)
- 1 km/h
- 0.2777777778 km/h
- 1 mph
- 0.44704 km/h
- 1 m/s
- 1 km/h
- 1 kn
- 0.5144444444 km/h
- 1 ft/s
- 0.3048 km/h
Every speed unit is converted through kilometres per hour using its exact definition.
Common conversions
| From | To |
|---|---|
| 100 km/h | 62.13711922 mph |
| 60 mph | 96.56064 km/h |
| 1 m/s | 3.6 km/h |
| 1 kn | 1.852 km/h |
| 1 mph | 0.44704 m/s |
| 100 km/h | 27.77777778 m/s |
How to read your result
- The table shows the same speed in every unit.
Worked example
Example: 110 miles per hour = 177.02784 km/h
- Inputs: Value: 110; From: Miles per hour (mph); To: Kilometres per hour (km/h).
- Formula: Result = Value × (size of the “from” unit ÷ size of the “to” unit)
- Multiply by the number of km/h in one mph 110 × 1.609344 = 177.02784 km/h
- Result: 110 miles per hour = 177.02784 km/h
- 1 mph = 1.609344 km/h
- 1 km/h = 0.6213711922 mph
Questions people ask
How fast is 100 km/h in mph?
About 62.14 mph.
What is a knot?
One nautical mile per hour: exactly 1.852 km/h or about 1.151 mph.