Speed Converter

Convert between m/s, km/h, mph, knots, and Mach.

Calculators

How to Use Speed Converter

  1. 1Enter a speed value
  2. 2Select the source unit
  3. 3See all other unit equivalents instantly

About Speed Converter

The Speed Converter converts between all common speed units: meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), knots, feet per second (ft/s), and Mach number (the speed of sound). Useful for physics, travel, and aviation.

Frequently Asked Questions

What Mach speed is used?

Mach is calculated using the speed of sound at sea level (343 m/s at 20°C).