Speed Converter — Free Online Tool
Convert between m/s, km/h, mph, knot and ft/s in real time.
Result
0
About Speed Converter
The Speed Converter switches velocity values between meters per second, kilometers per hour, miles per hour, knots, and feet per second. Type a value and the converted speed updates live, with the formula shown so you can quickly compare car speeds, wind speeds, and scientific measurements.
Speed conversions are useful for driving abroad, sailing and aviation where knots are standard, running and cycling stats, and physics homework. Every calculation happens in your browser for instant, private results without any server round trip.
How to Use Speed Converter
- Enter the speed value you want to convert in the Value field.
- Choose the source unit, such as km/h, in the From dropdown.
- Choose the target unit, such as mph, in the To dropdown.
- View the converted speed instantly and copy it if you need it.
Key Features
Convert between 5 speed units including knots and mph
Live conversion that updates as you type
Swap button to reverse the from and to units
Shows the conversion formula for each result
Runs fully client-side for privacy
Copy the result to your clipboard in one click
Frequently Asked Questions
How do I convert km/h to mph?
Divide the speed in kilometers per hour by 1.609344, or multiply by 0.621371. For example, 100 km/h equals about 62.14 mph.
What is a knot in mph?
One knot equals one nautical mile per hour, which is about 1.15078 mph or 1.852 km/h. Knots are standard in marine and aviation navigation.
How fast is 1 meter per second?
One meter per second equals 3.6 km/h, about 2.237 mph, or roughly 3.281 feet per second.
Why are aircraft and ships measured in knots?
Knots are based on nautical miles, which relate directly to latitude and longitude, making navigation calculations simpler on charts.