Converters
Speed Unit Converter
Enter a value once, pick its unit, and see it converted to every other speed unit β km/h, m/s, mph, knots, and more β instantly.
Converted to all speed units
Tip: click any row to make that unit the input.
How It Works
Every unit is converted through meters per second (m/s), the SI unit of speed, using exact factors (1 mph = 0.44704 m/s, 1 knot = 1,852 m per hour). The list updates live as you type.
Example
100 km/h = 27.778 m/s = 62.137 mph = 53.996 knots
Frequently Asked Questions
How do I convert between two specific units?
Enter your value, select the unit it's in from the "From unit" dropdown, and read the result off the row for the unit you want. Clicking a row makes that unit the new input, so you can chain conversions.
How do I convert km/h to mph?
Multiply by 0.621371 (or divide by 1.609344). So 100 km/h = 62.137 mph, and 60 mph = 96.56 km/h.
What is a knot?
A knot is one nautical mile (1,852 m) per hour = 1.852 km/h β 1.1508 mph. It's the standard speed unit in aviation and at sea.
Are the conversion factors exact?
Yes. 1 mph = 1,609.344 m per hour = 0.44704 m/s exactly, and 1 knot = 1,852 m per hour exactly. Displayed results are rounded for readability.