Meters per second (m/s) is the SI base unit for speed and velocity, representing the distance in meters traveled during one second. It is the standard unit in physics, engineering, and scientific research, used to describe everything from falling objects to fluid flow rates. One meter per second equals exactly 3.6 kilometers per hour or approximately 2.237 miles per hour.

The knot (kn) equals one nautical mile per hour or approximately 1.852 kilometers per hour, the universal speed unit for maritime and aviation navigation. Ship speeds, aircraft velocities, and wind speeds in meteorological reports all use knots as their standard measurement. One knot equals exactly 1.15078 miles per hour, reflecting the longer nautical mile compared to the statute mile.