Adult Seatbelts

Infographic for assessing if your child is ready to use a seatbelt


Seatbelts are designed for people with a minimum height of 145cm.

The law requires children younger than seven years of age to use an approved, properly fastened and adjusted child restraint or booster seat when travelling in a car. From age seven, children can use a booster seat or an adult seatbelt.

Keep in mind that children who use an adult seatbelt too early are 3.5 times more likely to sustain a significant injury, particularly to the head. Do not move children to an adult seatbelt too early.

If your child does not fit correctly in an adult seatbelt, they will need to stay in a booster seat.

5 Step Test – Is your child ready to use a seatbelt?

1. Does the child sit all the way back against the seat?
2. Do the child's knees bend comfortably at the edge of the seat?
3. Does the belt cross the shoulder properly between the child’s neck and arm?
4. Is the lap belt as low as possible and touching the child’s thighs?
5. Can the child stay seated like this for the whole trip?

Safety tips

  • Do not allow your child to slump when sitting in a seatbelt. The lap belt must be on their thighs.
  • A lap/sash belt is much safer than just a lap-only seatbelt. Consider having an engineer retrofit a lap/sash seatbelt that meets requirements. 

Not the right restraint for your child? Find out more about the other options available.