Speed Converter

Speed Converter is a free tool that runs entirely in your browser, with no data ever sent to a server. Convert a speed between km/h, m/s, mph, and knots.

What it's for

Compare a speed limit sign in mph to a limit in km/h, convert a wind speed to knots, or check a scientific value in meters per second.

What this tool does not do

This tool only applies the calculation described, with no check on the context of use. No limit is set by the tool itself; the only constraint is your device's memory.

Frequently asked questions

What is a knot?

A knot equals one nautical mile per hour, or 1.852 km/h. It's used in maritime and aviation navigation.

Is my data sent to a server?

No: the values you enter are processed entirely in your browser, on your device. They are never transmitted to a server.

Do I need to create an account or install anything?

No: the tool works directly in this page, with no sign-up and nothing to install.