Acceleration Calculator
Find the average acceleration of an object from its initial and final velocity over a time interval.
m/s
m/s
s
27 m/s
0.275 g
Formula
Examples
| Input | Result |
|---|---|
| vi = 0, vf = 27 m/s, t = 10 s | a = 2.7 m/s² |
About this calculator
Acceleration measures how quickly velocity changes. The average acceleration is the change in velocity divided by the time over which it occurs: a = (vf − vi) / t. With velocities in metres per second and time in seconds, acceleration is in metres per second squared (m/s²).
A positive result means the object is speeding up in the direction of motion, while a negative result indicates deceleration. Expressing acceleration as a multiple of g (9.80665 m/s²) is a handy way to compare it with the pull of gravity — useful in vehicle performance, aviation and amusement-ride design.
Frequently asked questions
Average acceleration is the change in velocity divided by time: a = (vf − vi) / t, giving m/s² when velocity is in m/s and time in seconds.
A negative value means the object is slowing down (decelerating) relative to its direction of motion, because the final velocity is less than the initial velocity.
Earth’s gravitational acceleration is about 9.80665 m/s². Dividing your acceleration by this value tells you how many g-forces are involved.
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