Deceleration G-Force Calculator

Inputs

Assumes constant acceleration unless stated otherwise.

Load example:

These buttons prefill inputs so you can test instantly.

Initial speed

Common: 100 km/h ≈ 27.78 m/s.

Final speed

Use 0 for a full stop.

Calculation method

Pick the input you know best.

Stopping time

Example: 2.5 s for a strong braking event.

Stopping distance

Distance should be the deceleration distance, not total travel.

Deceleration (acceleration value)

If you enter g, it will be converted using g0 = 9.80665 m/s².

Keep sign of acceleration (advanced)

Rounding

Reset

Sample scenarios showing how g-force changes with time and distance (constant deceleration assumption).

Scenario	Initial speed	Final speed	Time	Distance	g-force
Car braking (mild)