# Convertible car seats that also convert to booster seats Which convertible car seats can also be used as booster seats for older children? Britax One4Life Slim ClickTight All\-in\-One: The maker lists rear\-facing to 50 lbs, forward\-facing harness to 65 lbs, and high\-back belt\-positioning booster to 120 lbs\. Cybex Callisto T 360: It is an all\-in\-one convertible seat with rear\-facing up to 50 lb, forward\-facing up to 65 lb, and belt\-positioning booster up to 120 lb\. Graco SlimFit 3\-in\-1 Narrow All\-in\-One Convertible Car Seat: The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. Maxi\-Cosi Andi 360 Rotating All\-in\-One Convertible Car Seat \(CC425 / CC425HHO\): All three modes and their weight/height ranges: rear\-facing 5–40 lbs, 19–40 in\.; forward\-facing 30–65 lbs, 34\.4–49 in\.; belt\-positioning high\-back booster 40–100 lbs, 43\.4–52 in\. Maxi\-Cosi\-dc Pria Max All\-in\-One: Store data says rear\-facing from 4\-40 pounds, forward\-facing to 65 pounds, and booster up to 100 pounds\. ### 1. [Britax One4Life Slim ClickTight All\-in\-One](/products/ucp/albeebaby-com/9564457369831) (sold by albeebaby\.com) The maker lists rear\-facing to 50 lbs, forward\-facing harness to 65 lbs, and high\-back belt\-positioning booster to 120 lbs\. - Booster range: The maker lists rear\-facing to 50 lbs, forward\-facing harness to 65 lbs, and high\-back belt\-positioning booster to 120 lbs\. (guide) - Width: The seat is 17\.5 inches wide, which the listing says lets you fit three across in most vehicles\. (listing) - Installation: The ClickTight panel doubles as a seat belt lock\-off, giving a quick tight installation and making the seat a good option in older or international vehicles\. (review) ### 2. [Cybex Callisto T 360](/products/ucp/albeebaby-com/9722095272167) (sold by albeebaby\.com) It is an all\-in\-one convertible seat with rear\-facing up to 50 lb, forward\-facing up to 65 lb, and belt\-positioning booster up to 120 lb\. - Booster range: It is an all\-in\-one convertible seat with rear\-facing up to 50 lb, forward\-facing up to 65 lb, and belt\-positioning booster up to 120 lb\. (listing) - Width: Assembled measurements are 21\.7 in long, 19\.5 in wide, and 25\.5 in high\. (listing) - Installation: - ### 3. [Graco SlimFit 3\-in\-1 Narrow All\-in\-One Convertible Car Seat](/products/ucp/albeebaby-com/9564451504359) (sold by albeebaby\.com) The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. - Booster range: The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. (listing) - Width: Rotating cup holders rotate away to make the seat about 10% slimmer\. (listing) - Installation: Installation is very easy and instructions are easy to understand; it has premium push\-on LATCH connectors\. (blog) ### 4. [Maxi\-Cosi Andi 360 Rotating All\-in\-One Convertible Car Seat \(CC425 / CC425HHO\)](/products/ucp/albeebaby-com/9564462645479) (sold by albeebaby\.com) All three modes and their weight/height ranges: rear\-facing 5–40 lbs, 19–40 in\.; forward\-facing 30–65 lbs, 34\.4–49 in\.; belt\-positioning high\-back booster 40–100 lbs, 43\.4–52 in\. - Booster range: All three modes and their weight/height ranges: rear\-facing 5–40 lbs, 19–40 in\.; forward\-facing 30–65 lbs, 34\.4–49 in\.; belt\-positioning high\-back booster 40–100 lbs, 43\.4–52 in\. (guide) - Width: - - Installation: TensionFix is a patent\-pending red\-to\-green indicator that shows when the vehicle seat belt has proper tension, addressing loose belt tension\. (guide) ### 5. [Maxi\-Cosi\-dc Pria Max All\-in\-One](/products/ucp/albeebaby-com/9722085867751) (sold by albeebaby\.com) Store data says rear\-facing from 4\-40 pounds, forward\-facing to 65 pounds, and booster up to 100 pounds\. - Booster range: Store data says rear\-facing from 4\-40 pounds, forward\-facing to 65 pounds, and booster up to 100 pounds\. (listing) - Width: - - Installation: The owner center provides step\-by\-step installation videos and detailed installation manuals\. (manual) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-27T07:58:32.572Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)