How long does it take for an air bag to inflate?

An airbag typically takes about 20 to 30 milliseconds to fully inflate after a collision is detected. The rapid deployment is crucial for providing immediate protection to occupants during a crash, as the airbag needs to inflate before the occupant makes contact with the vehicle's interior. This quick inflation is achieved through a chemical reaction that generates gas, allowing the airbag to expand almost instantaneously.