Acceleration Calculator
a = Δv / Δt • Use v₁ and v₂ or direct Δv
Choose the input style you want, then enter the matching values.
Quick summary
Enter velocity and time values, then click Calculate.
Changing the velocity unit resets the active velocity input set.
Time must be greater than 0.
You can use negative values if direction matters.
The calculator uses Δv = v₂ − v₁.
Use a negative Δv for deceleration.
Results
Acceleration
— m/s²
Acceleration
— ft/s²
Acceleration
— g
Results are computed in SI units first, then shown in common acceleration units.
Use this Acceleration Calculator to find average acceleration from a change in velocity and elapsed time. You can enter initial and final velocity or enter the velocity change directly.
Calculation Method
Acceleration = change in velocity ÷ elapsed time
a = Δv ÷ Δt
If initial and final velocity are known:
Δv = v₂ − v₁
a = (v₂ − v₁) ÷ Δt
Example
If velocity increases from 10 m/s to 25 m/s in 5 seconds:
a = (25 − 10) ÷ 5
a = 3 m/s²
Important Note
This calculates average acceleration over the entered time interval, not instantaneous acceleration. A negative result indicates acceleration in the negative direction; it does not always mean the object is slowing down.