Acceleration Converter
Enter an acceleration value and its unit to see the equivalent in m/s², standard gravity (g), ft/s², and km/h per second.
How acceleration conversion works
Meters per second squared (m/s²) is the SI unit of acceleration — the rate at which velocity changes. Standard gravity (g), used to express how many "g-forces" an acceleration represents, is defined as exactly 9.80665 m/s², Earth's average gravitational acceleration.
Km/h per second is a practical unit for describing vehicle acceleration (like 0-100 km/h times), converting that familiar speed unit into a rate of change — 1 m/s² equals exactly 3.6 km/h per second.
Frequently asked questions
What does "3g" of acceleration mean?
3g means an acceleration three times standard gravity, or about 29.42 m/s² — a figure sometimes used to describe forces experienced during a roller coaster ride or aggressive vehicle maneuvers.
How do I convert a 0-100 km/h time into acceleration?
Divide 100 km/h by the time in seconds to get km/h per second, then convert that to m/s² by dividing by 3.6 — for example, 0-100 km/h in 10 seconds is 10 km/h/s, or about 2.78 m/s².
Why is gravity used as an acceleration unit?
Earth's gravitational acceleration is a familiar, constant reference point, making "g" an intuitive way to express how intense an acceleration feels compared to the everyday experience of gravity.