Acceleration is the rate of change of velocity. Braking is negative acceleration.
How to use the Acceleration Calculator
- Initial velocity
- Final velocity
- Time
- Want to work backwards? Type a value into Acceleration and Final velocity is calculated for you.
Results update as you type, and every field accepts the units shown in its menu.
How it works
Subtract initial velocity from final velocity and divide by the time taken.
Inputs explained
| Field | What to enter |
|---|---|
| Initial velocity | Units: m/s, km/h, mph, ft/s, knots |
| Final velocity | Units: m/s, km/h, mph, ft/s, knots |
| Time | Units: s, min, h |
What each result means
- Acceleration = ([Final velocity] – [Initial velocity]) ÷ [Time]
- Distance covered = ([Initial velocity] + [Final velocity])÷2 × [Time]
Example values
How the main result changes when Final velocity changes and everything else stays at the example values above:
| Final velocity (m/s) | Acceleration (m/s²) |
|---|---|
| 13.89 | 1.74 |
| 20.83 | 2.6 |
| 27.78 | 3.47 |
| 34.72 | 4.34 |
| 41.67 | 5.21 |
| 55.56 | 6.94 |
Formula
a = (v − u) ÷ tWorked example
Inputs — Initial velocity: 0 m/s; Final velocity: 27.7778 m/s; Time: 8 s.
Results — Acceleration = 3.47 m/s²; Distance covered = 111.11 m.
Frequently asked questions
What is 0–100 km/h in 8 seconds in g?
About 0.35 g.
What does negative acceleration mean?
The object is slowing down in the direction of motion.
What formula does the Acceleration Calculator use?
a = (v − u) ÷ t.
Can I work backwards from the result?
Yes. Type the result you want into Acceleration and the calculator finds the matching final velocity.