Car seat calculator

Type your child's weight and height. This shows every seat whose published manufacturer limits cover those numbers, in each mode the manufacturer prints — with the manual cited. It does not rank seats or tell you a seat is safe for your child; that is decided by the manuals and a hands-on check.

🛟 Fit is decided by your seat manual + your vehicle manual. This page lists published specs to help you shortlist — it is not installation or safety advice, and it does not confirm a seat fits a specific car. Confirm install with the manuals, NHTSA, or a free certified car-seat technician (CPST) check.

Weight lb Height in Needs to fit 3 across

Height is optional — leave it blank to match on weight alone. A seat is listed only if the manufacturer publishes a limit for that mode.

Enter a weight to see matching seats.

Then: how to check fit in your actual car · what your state requires · how long the seat lasts

Covers 44 of 69 seats — the ones whose manufacturers publish numeric limits. Last verified 2026-06-11.