Acceleration Calculator
Acceleration calculator for constant acceleration: a = (v − v0)/t. Solve for acceleration, final or initial velocity, or time.
v = v0 + a · t
How to use this calculator
- Choose the quantity you want under “Solve for”.
- Type the known values and pick their units: any combination works.
- The result updates as you type. Open “Show the steps” to see the substitution.
Acceleration is the rate of change of velocity. With constant acceleration, v = v₀ + a·t, so a = (v − v₀)/t.
A negative result means the object slows down (deceleration). Use g (9.80665 m/s²) as a unit to compare with free fall.
Formula
v = v0 + a · t
| Symbol | Quantity | Units |
|---|---|---|
| v0 | Initial velocity | m/s, km/h, mph, kn, ft/s, c |
| v | Final velocity | m/s, km/h, mph, kn, ft/s, c |
| t | Time | s, ms, µs, ns, min, h, d, wk, yr |
| a | Acceleration | m/s², ft/s², g, Gal |
Worked example
Given: v0 = 5 m/s · v = 25 m/s · t = 4 s
a = v − v0t
Result: a = 5 m/s²
Frequently asked questions
What is 0–60 mph in 6 seconds as an acceleration?
60 mph = 26.82 m/s, so a = 26.82/6 = 4.47 m/s², about 0.46 g.
What does negative acceleration mean?
The velocity decreases in the direction of motion: the object is braking.