Convert Units of Speed
Enter a speed, choose the unit you have and the unit you need, and the result appears at once. The same speed is also shown in every other unit, with a quick table for common values — for driving abroad, running, sailing, aviation and physics.
One mile per hour is exactly 1.609344 km/h, one knot is one nautical mile (1,852 m) per hour, and 1 m/s is 3.6 km/h. Everything is calculated in your browser.
Why Use This Speed Converter?
- km/h, mph, m/s, knots and ft/s
- Result as you type, with a swap button
- The speed in all units at once, plus a quick conversion table
- Exact conversion factors
How to Convert Speed
- Type the speed you want to convert
- Choose the units in the "From" and "To" lists
- Read the result or copy it with one click
Frequently Asked Questions
Is this speed converter free?
Yes, it is completely free and has no limits.
How do I convert km/h to mph?
Divide by 1.609344 (or multiply by about 0.6214). For example, 100 km/h is about 62.14 mph, and 70 mph is about 112.65 km/h.
What is a knot?
A knot is one nautical mile per hour, exactly 1.852 km/h or about 1.151 mph. It is used at sea and in aviation.
Is any data sent to a server?
No. All conversions are calculated in your browser.