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.