Tools · Car Seat
New Jersey Car Seat & Booster Checker (2026)
Enter your child's age, height, and weight to see the minimum seat stage New Jersey law requires and the first-offense fine ($50–$75). This is the legal minimum, not best safety practice.
New Jersey car seat checker
4′9″ = 57 in. Enter only the boxes you have. New Jersey uses required while under 8 AND under 57 in; reaching either exits.
- Child
- Not entered
- Minimum legal stage
- Enter age / height / weight
- Booster-exit rule
- required while under 8 AND under 57 in; reaching either exits
- First-offense fine
- $50–$75
Plain-language summary, not legal advice.
This shows the minimum legal requirement in New Jersey, not best safety practice, which is usually stricter, and not legal or safety advice. Always follow your car seat's manufacturer instructions. For the full four-stage rules, front-seat rule, and citation, see the New Jersey car seat law reference, cited to N.J.S.A. 39:3-76.2a (last reviewed 2026-07-09).
How New Jersey car seat law works
New Jersey has the most detailed multi-factor ladder of these 15 states, and every stage pairs an age with a second condition. Rear-facing is required for a child under 2 AND under 30 lb; the forward-facing harness for a child under 4 AND under 40 lb; and a booster for a child under 8 AND under 57 in. Because each stage combines two conditions, the booster exit is reaching age 8 or 57 in, whichever comes first. New Jersey also has a real rear-seat law: a restrained child must be secured in the rear seat, and a rear-facing seat may never sit in front of an active passenger airbag. The fine is a statutory $50–$75 (often assessed around $75), suspendable on proof you own and use a proper restraint.
This checker shows the New Jersey minimum legal requirement (not best safety practice, which is usually stricter) and is not legal or safety advice. For the full four-stage rules, front-seat rule, and citation, see the New Jersey car seat law reference.
Car seat checkers for other states
Same tool, each with its own booster-exit rule.