Tools · Car Seat
Oklahoma Car Seat & Booster Checker (2026)
Enter your child's age, height, and weight to see the minimum seat stage Oklahoma law requires and the first-offense fine ($50). This is the legal minimum — not best safety practice.
Oklahoma car seat checker
4′9″ = 57 in. Enter only the boxes you have. Oklahoma uses a booster is required for ages 4–7 who are 4′9″ or shorter; reaching age 8 or a height above 4′9″ exits.
Heads up: Oklahoma added the codified rear-facing-until-2 requirement effective November 1, 2019 (HB 2384). Older summaries that describe only an "under 4 in a seat, 4–8 in a booster" rule predate that change and miss the rear-facing mandate.
- Child
- Not entered
- Minimum legal stage
- Enter age / height / weight
- Booster-exit rule
- a booster is required for ages 4–7 who are 4′9″ or shorter; reaching age 8 or a height above 4′9″ exits
- First-offense fine
- $50
Plain-language summary, not legal advice.
This shows the minimum legal requirement in Oklahoma, 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 Oklahoma car seat law reference, cited to 47 O.S. §11-1112 (last reviewed 2026-07-11).
How Oklahoma car seat law works
Oklahoma is one of the states that actually writes rear-facing into law rather than leaving it to best practice. Since the 2019 update, a child under 4 must be in a child passenger restraint system, and it has to be rear-facing until age 2 or the seat’s manufacturer limit, whichever comes first. The booster stage is a clean age-or-height rule: children ages 4 through 7 who are 4′9″ or shorter need a booster, and reaching age 8 or growing past 4′9″ ends it. Oklahoma does not have a rear-seat law, so the "back seat until 13" line you may see is a NHTSA recommendation here, not a statute. The fine is a flat $50, but a first-time driver who buys or borrows a proper restraint can have the fine suspended and court costs capped at $15.
This checker shows the Oklahoma 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 Oklahoma car seat law reference.
Car seat checkers for other states
Same tool, each with its own booster-exit rule.