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Acceleration Calculator

Use the constant-acceleration equations to find a missing motion value. Choose what to solve and metric or imperial units; the calculator also shows the resulting displacement and final position.

Assumes one-dimensional motion with constant acceleration. Velocity and acceleration may be negative to show direction; elapsed time must be positive. Changing acceleration, drag, rotation and safety suitability are not modeled.

How do you calculate acceleration?

For constant acceleration, a = (final velocity − initial velocity) ÷ time. For example, changing from 0 to 20 m/s in 5 seconds gives 4 m/s² and a displacement of 50 m. The tool also solves elapsed time, final velocity or displacement from the other values.

Frequently asked questions

How do you calculate acceleration?

For constant acceleration, a = (final velocity − initial velocity) ÷ time. For example, changing from 0 to 20 m/s in 5 seconds gives 4 m/s² and a displacement of 50 m. The tool also solves elapsed time, final velocity or displacement from the other values.

Are my values uploaded?

No. The calculation runs in this browser; values are not uploaded or saved.

What is the formula for acceleration?

For constant acceleration, divide the change in velocity by elapsed time: a = (vf − vi) / t.

What is the difference between acceleration and speed?

Speed describes how fast an object moves. Acceleration describes how its velocity changes over time, including a change of direction.

Does this calculator assume constant acceleration?

Yes. It uses one-dimensional constant-acceleration equations; it does not model changing acceleration, drag, rotation or a real vehicle’s braking distance.