Acceleration Calculator

Last updated: June 2026

Initial velocity u

m/s

Final velocity v

m/s

Time

Distance optional

Acceleration

2.778 m/s2

G-force

0.283 g

Displacement estimate

138.9 m

Velocity change

27.78 m/s

Formula

a = (v - u) / t. SUVAT examples: s = ut + 0.5at^2, v = u + at, and v^2 = u^2 + 2as.

About this calculator

The Acceleration Calculator finds acceleration from initial velocity, final velocity, and time. It also shows g-force and a basic displacement estimate, making it useful for SUVAT practice and motion examples.

Acceleration formula

Acceleration is the rate of change of velocity. For uniform acceleration, SUVAT equations connect displacement, initial velocity, final velocity, acceleration, and time.

a = (v - u) / t
v = u + at
s = ut + 0.5at^2
v^2 = u^2 + 2as

How to use the acceleration calculator

Enter initial velocity.
Enter final velocity.
Enter elapsed time.
Optionally enter distance for comparison.
Review acceleration in m/s2.
Check the g-force equivalent.

Worked examples

Car acceleration

Input: 0 to 27.78 m/s in 10 s

Calculation: a = (27.78 - 0) / 10

Result: 2.778 m/s2

Slowing down

Input: 20 m/s to 5 m/s in 3 s

Calculation: a = (5 - 20) / 3

Result: -5 m/s2

Positive and negative acceleration

Positive acceleration means velocity increases in the chosen direction. Negative acceleration can mean slowing down or accelerating in the opposite direction.

Uniform acceleration

SUVAT equations assume constant acceleration. Non-uniform motion needs more advanced modelling or measured data.

Motion model limitation

This calculator assumes straight-line uniform acceleration. Real movement can include changing acceleration, drag, traction limits, slopes, and measurement error.

Frequently asked questions

What is acceleration?

Acceleration is change in velocity per unit time.

What unit is acceleration?

The SI unit is m/s2.

What does negative acceleration mean?

It indicates acceleration opposite to the chosen positive direction.

What is g-force?

It compares acceleration with Earth gravity, about 9.81 m/s2.

Does this solve every SUVAT problem?

It covers core relationships but not every possible unknown combination.

Related calculators

speed-calculator
force-calculator
projectile-motion-calculator

What does this mean?

This calculator is designed to help you understand the likely number before you make a decision or start an application.

Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.

Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.