Does this account for air resistance?

No, this assumes ideal free fall in a vacuum with no air resistance. Real falling objects — especially light or large-surface-area ones — reach terminal velocity and fall slower than this predicts.

What if the object has an initial downward velocity?

This formula assumes starting from rest (initial velocity of zero). If the object already has downward speed, a more complete kinematic equation is needed.

Free-Fall Time Calculator

Calculate the time it takes for an object to fall from a given height under gravity alone, ignoring air resistance, using the standard kinematic equation for free fall from rest.

Inputs

Results

Fall Time: 4.518 seconds

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Formula

t = √(2h / g)

Learn How This Works

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