Acceleration Calculator
By Santaji GadepatilinUpdated October 27, 2026
m/s²
calculatedcalculated
Type in any field to change it. Press × on a value to calculate that field instead.
How to use this calculator
Enter the initial speed, final speed and time to get the acceleration in m/s² and in g. Or enter the acceleration to find the time or speed.
The formula
a = (v − u) ÷ t
Worked example
A car goes from 0 to 100 km/h in 8 seconds:
- Change in speed = 100 km/h = 27.78 m/s
- a = 27.78 ÷ 8 = 3.47 m/s² = 0.354 g
Typical accelerations
| Situation | Acceleration |
|---|---|
| Family car, 0–100 km/h in 12 s | 2.3 m/s² |
| Sports car, 0–100 km/h in 3.5 s | 7.9 m/s² |
| Free fall | 9.81 m/s² (1 g) |
| Emergency braking (dry road) | about −8 m/s² |
Related equations
For distance covered while accelerating, use the SUVAT calculator.
Frequently asked questions
What is the formula for acceleration?
Acceleration = (final speed − initial speed) ÷ time. Its SI unit is metres per second squared (m/s²).
What is 1 g?
The acceleration due to gravity at Earth's surface, 9.80665 m/s².
What does negative acceleration mean?
Slowing down (deceleration) — the final speed is lower than the initial speed.