Boosters have a minimum weight for a reason: below it the lap belt sits on the abdomen instead of the hip bones. Enter your child’s weight to see whether they clear the threshold, and what to do if they are close but not there.
Check If Your Child’s Weight Is Legal for a Booster Seat
Your child might look big enough for a booster — but their weight and height have to clear the legal bar for your state first.
Enter your child’s weight and height, select your jurisdiction. The checker compares against state-specific minimums and NHTSA FMVSS 213 thresholds instantly.
Using a booster before a child meets the legal weight threshold is a ticketable offence in every US state. It also significantly reduces crash protection.
Parents, school run drivers, rideshare operators, and childcare providers.
- US Federal FMVSS 213
- All 50 US states (weight and height minimums)
- AAP guidelines
- EU ECE R129
- Canadian CMVSS
Disclaimer: This tool is provided for educational and informational purposes only and does not constitute legal, safety, or professional advice. Sunferno Automotive Accessories cannot verify how products are installed, used, or attached in your specific vehicle or situation — proper installation, use, and securement are solely the responsibility of the user. Laws and regulations vary by jurisdiction and change over time; always confirm current requirements with your local authorities or a qualified professional. Sunferno products must be used strictly in accordance with manufacturer instructions and applicable regulations.