Impulse Calculator

Use J = FΔt to find impulse and momentum change, with an optional mass input to estimate velocity change.

Average force

Force duration

Mass (optional)

—N·s impulse

—kg·m/s momentum change

—Δv for entered mass

—duration ms

—J = FΔt = Δp

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

Physics model preflight

Check the governing model before trusting the number

constant average force over interval

J = FΔt = Δp

Reading the current native inputs…

Duration is non-negative; signed average force gives signed impulse. Optional mass only affects Δv helper. This is an idealized educational model: unit consistency and valid inputs do not guarantee that omitted effects are negligible in a real system.

Impulse / force / duration reverse solver

Solve J, average force or duration from J = FΔt and, when mass is supplied, translate impulse into velocity change.

Solve forForce (N)Duration (s)Impulse (N·s)Mass (kg, optional)

—Solved quantity

—Δv from mass

Ready.

State the model before trusting the number

Classical formulas are only as good as their assumptions and units. Air resistance, damping, deformation, non-constant forces and measurement uncertainty are not silently invented when the selected model does not include them.

Governing physics model

J = FΔt = Δp — constant average force over interval.

How to verify the result

Impulse should equal both FΔt and the momentum change Δp. If mass is supplied, Δv should satisfy mΔv = J.

Domain and assumption boundary

Duration is non-negative; signed average force gives signed impulse. Optional mass only affects Δv helper. The calculator does not silently add drag, damping, deformation, varying fields, relativistic effects, measurement uncertainty, or geometry that the selected model does not contain.