KM/H to meters per second
Convert kilometers per hour to meters per second for physics calculations, sports analysis and engineering specs. Divide by 3.6 — reference table for common speeds.
Last updated: May 2026
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How to use this converter
Kilometers per hour is the everyday road unit, while meters per second is the SI unit used in physics and engineering. Use this converter when a speed is given in km/h and a calculation needs m/s. m/s = km/h × 0.2777777778
Common reference values
| km/h | m/s |
|---|---|
| 10 | 2.78 |
| 50 | 13.89 |
| 100 | 27.78 |
| 120 | 33.33 |
Frequently Asked Questions
Why convert between different speed units?
Different countries and fields use different speed units. Pilots use knots, drivers use mph or km/h, and scientists use m/s. Converting between them is essential for safety and compliance.
Is my speed in the right unit?
Always check the context—roads show speed limits in your country's standard unit. Aircraft speeds are in knots. Weather reports may use different units depending on region.
Why does physics use m/s instead of km/h?
m/s is the SI base unit for speed, built directly from meters and seconds. Physics equations — kinetic energy (½mv²), force (F=ma), wave speed — produce correct SI outputs only when speed is in m/s. To convert km/h to m/s, divide by 3.6. For example, 90 km/h = 25 m/s.