Speed Converter
Fill in the values and the answer updates as you type.
How the Speed Converter works
Every speed is first expressed in meters per second, then converted to the target unit. Example: 60 mph × 0.44704 = 26.82 m/s = 96.56 km/h. Mach uses the speed of sound at sea level and 15 °C (about 340.29 m/s).
Inputs and results
The Speed Converter takes 3 inputs and gives 3 results.
What you enter
- Value — starts at 1.
- From — starts at Miles per hour. Choose from: Kilometers per hour, Miles per hour, Meters per second, Knots, Feet per second and Mach (at sea level).
- To — starts at Kilometers per hour. Choose from: Kilometers per hour, Miles per hour, Meters per second, Knots, Feet per second and Mach (at sea level).
What you get
- Converted value
- Conversion factor
- Same value in meters per second
Example: Speed Converter with the starting values
With value 1, from Miles per hour and to Kilometers per hour, the calculator returns:
| Converted value | 1.609344 Kilometers per hour |
|---|---|
| Conversion factor | 1 Miles per hour = 1.609344 Kilometers per hour |
| Same value in meters per second | 0.44704 meters per second |
Change any value above and the results update straight away.
Speed Converter FAQ
How do I use the Speed Converter?
Enter value, from and to in the fields, then read converted value, conversion factor and same value in meters per second in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Speed Converter calculate?
Convert km/h, mph, m/s, knots, feet per second, and Mach. It returns converted value, conversion factor and same value in meters per second from the 3 values you provide.
What values does the Speed Converter start with?
It opens with value 1, from Miles per hour and to Kilometers per hour so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Speed Converter free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Speed Converter for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.