A worked example: 100 km/h to m/s
100 km/h converts to 27.777778 m/s — dividing by 3.6, the standard shortcut for km/h to m/s (since there are 3.6 seconds-to-hours and meters-to-kilometers factors combined into one number).
The method: convert through a common reference unit
Rather than a dedicated formula for every pair of units (km/h to mph, mph to knots, knots to ft/s, and so on), each unit has a known conversion factor to meters per second — the starting value converts to m/s first, then from m/s to the target unit. This scales to any number of supported units without a combinatorial explosion of formulas.
A running-relevant example: 12 km/h to mph
12 km/h — a common recreational running speed — converts to 7.456454 mph, useful for comparing a pace-based speed figure against mile-based pace charts or treadmill displays calibrated in mph.
What a knot actually is
A knot is 1 nautical mile per hour, used in maritime and aviation contexts, where 1 nautical mile is defined as exactly 1,852 meters — roughly 1.852 km/h per knot, a different reference distance from the standard statute mile used for mph.
Where a converted speed value connects to pace
Speed (distance per time) and pace (time per distance, like minutes per km) are inverse concepts describing the same motion — converting a speed value and converting a pace value are two sides of the identical underlying relationship.