Speed Converter
Convert between meters per second, kilometers per hour, miles per hour, knots, and 16 other speed units instantly.
About Speed Converter
Our Speed Converter is a comprehensive tool that allows you to convert speed measurements between different units seamlessly. Whether you're working on physics problems, engineering projects, vehicle performance calculations, or navigation tasks, this tool provides accurate conversions across 20 commonly used speed units.
The tool supports conversions between Meters per second (m/s), Kilometers per hour (km/h), Miles per hour (mph), Feet per second (ft/s), Knots (kn), Mach, and 15 other units. All conversions are calculated with high precision and displayed instantly as you type or change units. Use this tool to quickly convert between metric and imperial speed units, or to compare speeds across different measurement systems.
Convert From
How to Use
Enter the Speed Value
Type the numerical value of the speed you want to convert in the "Speed Value" field. You can enter whole numbers, decimals, or very large or small values. The input accepts any valid number.
Select the Original Unit
Choose the unit of your input value from the "From Unit" dropdown. Options include Meters per second (m/s), Kilometers per hour (km/h), Miles per hour (mph), Knots (kn), Mach, and 15 other speed units.
Select the Target Unit
Choose the unit you want to convert to from the "To Unit" dropdown. You can also use the "Swap Units" button to quickly switch between the source and target units.
View Results
Click "Convert" to see the result. The tool will display the converted value, the formula used, and all possible conversions from your original value to every supported unit.
Common Conversions
Quick links to frequently used speed conversions. Click any link to see the instant result.
Frequently Asked Questions
What are the different speed units?
Meters per second (m/s): The SI unit of speed, commonly used in science and engineering. Kilometers per hour (km/h): The most widely used unit for road traffic worldwide. Miles per hour (mph): Used primarily in the United States and United Kingdom. Feet per second (ft/s): Used in engineering and ballistics. Knots (kn): Used in maritime and aviation contexts (1 knot = 1 nautical mile per hour). Mach: Ratio of speed to the speed of sound (Mach 1 = speed of sound). Speed of light (c): The speed of light in vacuum, approximately 299,792,458 m/s.
How do I convert km/h to mph?
To convert from kilometers per hour to miles per hour: mph = km/h × 0.621371. For example, 100 km/h equals approximately 62.14 mph. Our tool handles all these calculations automatically for any unit combination.
What is the difference between speed and velocity?
Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction. This converter deals with speed (magnitude only), not velocity. The units and conversion factors are the same for both.
What is a knot and where is it used?
A knot is a unit of speed equal to one nautical mile per hour (exactly 1.852 km/h or approximately 1.151 mph). It is primarily used in meteorology, maritime navigation, and aviation. The term comes from the historical method of measuring ship speed using a knotted rope.
Is this tool free to use?
Absolutely! Our Speed Converter is completely free to use, with no registration required. We believe in providing high-quality, accessible tools for students, engineers, and anyone who needs to perform speed conversions quickly and accurately.