Acceleration is how quickly velocity changes. This acceleration calculator uses a = (v − u) ÷ t, where u is the starting velocity, v the final velocity and t the time taken.
A negative answer is a deceleration (retardation): the object is slowing down. The calculator also gives the distance covered while accelerating, assuming the acceleration is uniform, and the acceleration as a multiple of g (9.81 m/s²).
| Initial velocity (u) | 0 m/s |
| Final velocity (v) | 27.78 m/s |
| Time taken (t) | 10 s |
| Acceleration (m/s²) | 2.778 |
| Distance covered (m) | 138.9 |
| Acceleration in g | 0.283277 |
| Speed gained per second (km/h per s) | 10.0008 |
The car accelerates at 2.778 m/s² and covers 138.9 m.
Try this example →| Initial velocity (u) | 20 m/s |
| Final velocity (v) | 0 m/s |
| Time taken (t) | 4 s |
| Acceleration (m/s²) | -5 |
| Distance covered (m) | 40 |
| Acceleration in g | -0.509858 |
| Speed gained per second (km/h per s) | -18 |
The acceleration is -5 m/s², a deceleration of 5 m/s².
Try this example →Acceleration = change in velocity ÷ time, a = (v − u) ÷ t. Its SI unit is m/s².
It means the velocity is decreasing. This is called deceleration or retardation.
1 g is the acceleration due to gravity at Earth's surface, about 9.81 m/s².
Yes. An object moving in a circle at constant speed is accelerating because its direction keeps changing.