How to Find Acceleration in G's
- 1). Convert all units of speed, distance and time to feet and seconds using an online calculator, such as that provided in the Resources. An object moving at 60 miles per hour, for example, moves at 88 feet per second, or 88 ft/s.
- 2). Calculate the acceleration of a person or object by dividing the change in velocity by the time over which the change took place. For example, consider a race car that starts from rest, or zero mph, and accelerates to a final velocity of 155 mph in 6.1 seconds. A velocity of 155 mph converts to 227 ft/s. The car's average acceleration is therefore (227 - 0 ft/s) / 6.1 s = 37.2 ft/s².
- 3). Determine the G-forces on the object by dividing its average acceleration by the acceleration due to gravity: 32 ft/s². A car accelerating at 37.2 ft/s² experiences 37.2 / 32 = 1.16 G's.
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