A speed converter is a tool that allows users to convert speed measurements from one unit to another. There are several units of measurement used to express speed, such as miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), and knots (nautical miles per hour).

The formula used to convert from one unit of speed to another depends on the specific units involved. Here are some common formulas for converting between different units of speed:

1. Converting mph to km/h: multiply the speed in mph by 1.60934
2. Converting km/h to mph: multiply the speed in km/h by 0.621371
3. Converting m/s to mph: multiply the speed in m/s by 2.23694
4. Converting mph to m/s: multiply the speed in mph by 0.44704
5. Converting knots to mph: multiply the speed in knots by 1.15078
6. Converting mph to knots: multiply the speed in mph by 0.868976

Here are some common speed conversions:

• 1 mph = 1.60934 km/h
• 1 km/h = 0.621371 mph
• 1 m/s = 2.23694 mph
• 1 mph = 0.44704 m/s
• 1 knot = 1.15078 mph
• 1 mph = 0.868976 knots

There are different types of speed converters available online, and they all work in a similar way. Users input the speed measurement in one unit and select the desired output unit. The converter then calculates and displays the converted speed in the new unit.