Every speed unit you need
Speed limits in km/h or mph, wind in knots, a physics answer in metres per second — speed comes in several units depending on country and field. This converter moves between km/h, mph, m/s, knots and feet per second in one click.
How it works
All units convert through metres per second as a base, keeping conversions exact. It's handy for driving abroad, sailing and aviation (which use knots), sport, and schoolwork. The most common everyday conversion — km/h to mph — is just a division by about 1.609.
Common conversions
- 100 km/h ≈ 62 mph
- 1 m/s = 3.6 km/h
- 1 knot ≈ 1.852 km/h
- 60 mph ≈ 96.6 km/h
Frequently asked questions
What are knots?
Nautical miles per hour, used in sailing and aviation.
km/h to mph quickly?
Divide by roughly 1.609, or multiply by about 0.621.
Is my data private?
Yes — everything is calculated in your browser.