CONVERTERS CALCULATOR
Speed Converter
Convert speed between miles per hour, kilometers per hour, meters per second, feet per second, and knots.
Enter a speed and select the unit you are converting from.
What Is a Speed Converter?
A speed converter changes a speed measurement from one unit to another. Common speed units include miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), feet per second (ft/s), and knots.
Speed conversions are useful for driving, travel, weather, engineering, aviation, navigation, science, and other situations where different measurement systems are used.
How to Use the Speed Converter
Enter the speed you want to convert and select the unit you are converting from. The calculator immediately shows the equivalent value in the other supported speed units.
Common Speed Units
The converter supports five commonly used speed units. Miles per hour and kilometers per hour are widely used for road travel, while meters per second is commonly used in science and engineering. Knots are commonly used in aviation and marine navigation.
Speed Conversion Table
| Unit | Abbreviation | Relationship to m/s |
|---|---|---|
| Miles per hour | mph | 1 mph = 0.44704 m/s |
| Kilometers per hour | km/h | 1 km/h = 0.277777... m/s |
| Meters per second | m/s | 1 m/s = 1 m/s |
| Feet per second | ft/s | 1 ft/s = 0.3048 m/s |
| Knots | kn | 1 knot = 0.514444 m/s |
How to Convert MPH to KM/H
To convert miles per hour to kilometers per hour, multiply the speed in mph by 1.609344.
For example, 60 mph is exactly 96.56064 km/h.
How to Convert KM/H to MPH
To convert kilometers per hour to miles per hour, multiply the speed in km/h by approximately 0.621371.
For example, 100 km/h is approximately 62.1371 mph.
How to Convert KM/H to M/S
To convert kilometers per hour to meters per second, divide the speed in km/h by 3.6.
For example, 100 km/h equals approximately 27.7778 m/s.
How to Convert M/S to KM/H
To convert meters per second to kilometers per hour, multiply the speed in m/s by 3.6.
For example, 10 m/s equals exactly 36 km/h.
How to Convert MPH to Knots
To convert miles per hour to knots, multiply the speed in mph by approximately 0.868976.
For example, 60 mph is approximately 52.137 knots.
Speed Converter Example
If a vehicle is traveling at 60 mph, the equivalent speed is approximately 96.5606 km/h, 26.8224 m/s, 88 ft/s, or 52.137 knots.
Frequently Asked Questions
How do I convert mph to km/h?
Multiply the speed in miles per hour by 1.609344. For example, 60 mph equals 96.56064 km/h.
How do I convert km/h to mph?
Multiply the speed in kilometers per hour by approximately 0.621371. For example, 100 km/h is about 62.1371 mph.
How do I convert km/h to m/s?
Divide the speed in kilometers per hour by 3.6. For example, 100 km/h equals approximately 27.7778 m/s.
How do I convert m/s to km/h?
Multiply the speed in meters per second by 3.6. For example, 10 m/s equals 36 km/h.
How many km/h is 1 mph?
1 mph equals exactly 1.609344 km/h.
How many mph is 1 km/h?
1 km/h equals approximately 0.621371 mph.
What is the difference between speed and velocity?
Speed describes how fast something moves, while velocity describes both speed and direction.
How many mph is 1 knot?
1 knot is approximately 1.150779 mph.