Impulse Calculator
Calculate impulse using force and time, or change in momentum. Impulse equals the change in momentum of an object.
Enter force and time to calculate impulse.
Impulse Formula
J = F × Δt
J = Δp = m × Δv
J = Δp = m × Δv
Impulse (J) is the product of force and the time interval over which it acts. It equals the change in momentum.
Example: A force of 200 N acts for 0.1 seconds.
J = 200 × 0.1 = 20 N·s
J = 200 × 0.1 = 20 N·s
Impulse-Momentum Theorem
The impulse-momentum theorem states that the impulse on an object equals the change in its momentum: F×Δt = m×Δv. This is why airbags work — they increase the collision time, reducing force.
FAQ
What are the units of impulse?
Impulse is measured in Newton-seconds (N·s) or equivalently kg·m/s, the same units as momentum.
Is impulse a vector?
Yes. Impulse has the same direction as the net force applied.
Last updated: 2026-08-08