What Is Acceleration?
Use this acceleration calculator to calculate acceleration, initial velocity, final velocity, or time from the standard motion formula. It is useful when you know any three of those values and want to solve the fourth.
How to Calculate Acceleration
Enter the starting speed, ending speed, and elapsed time, then the calculator finds acceleration in the selected unit. You can also switch the radio button to solve for time, initial velocity, or final velocity instead. The tool converts the selected speed and acceleration units automatically.
Sports Car Example: 0 to 100 km/h
If a sports car accelerates from 0 to 100 km/h in 2.5 s, the average acceleration is about 11.11 m/s².
100 km/h = 27.78 m/sa = (27.78 - 0) / 2.5 ≈ 11.11 m/s²
That is a simple real-world way to calculate acceleration from change in velocity over time.
Acceleration formulas
$$a=\frac {v_{1}-v_{0}}{t}$$
SI Units Reference
| Variable | Symbol | SI Unit |
|---|---|---|
| Speed / Velocity | v | metres per second (m/s) |
| Acceleration | a | metres per second squared (m/s²) |
| Time | t | second (s) |
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Acceleration Calculator FAQ
What is the acceleration formula?
The standard formula is a = (v1 - v0) / t, where a is acceleration, v0 is initial velocity, v1 is final velocity, and t is time.
How do you calculate acceleration?
Subtract the initial velocity from the final velocity, then divide by the elapsed time. For example, if speed changes from 0 to 27.78 m/s in 2.5 s, the acceleration is about 11.11 m/s².
Can this calculator solve for time, initial velocity, or final velocity too?
Yes. This acceleration calculator can solve for time, initial velocity, final velocity, or acceleration, depending on which radio button you select.
What units should I use for acceleration calculations?
Common combinations are m/s with seconds and m/s², or km/h with seconds while the calculator converts everything internally. The selected speed and acceleration units do not need to start in SI units because the tool handles the conversion.
What is an example of acceleration from 0 to 100 km/h?
If a sports car goes from 0 to 100 km/h in 2.5 s, convert 100 km/h to 27.78 m/s and use a = (27.78 - 0) / 2.5. The result is about 11.11 m/s².
Is acceleration the same as speed?
No. Speed or velocity measures how fast something is moving, while acceleration measures how quickly that velocity changes over time.
