Speed Converter

A speed converter is an online tool used to convert velocity values between units such as miles per hour (mph), kilometers per hour (km/h), knots, and meters per second (m/s).

Multiply the km/h value by 0.621371. For example, 100 km/h is approximately 62.14 mph.

A knot is a unit of speed equal to one nautical mile per hour, which is exactly 1.852 km/h or approximately 1.151 mph.

The speed of light in a vacuum is exactly 299,792,458 meters per second, or approximately 186,282 miles per second.

Multiply the m/s value by 3.6. For example, 10 m/s is exactly 36 km/h.

Yes, all conversion math is calculated locally in your browser.

Mach is a relative speed unit representing the ratio of an object's speed to the speed of sound in the surrounding medium. Mach 1 is approximately 343 m/s in air at 20°C.

This tool converts standard rates of speed. Pace (minutes per mile or kilometer) can be calculated by taking the reciprocal of speed.

It supports Meters per Second, Kilometers per Hour, Miles per Hour, Knots, and Feet per Second.

Yes, the speed converter is 100% free with no registration.