# Convertible car seats that also convert to a booster Which convertible car seats can also be used as booster seats for older children? Cybex Callisto G 360 Select: Accommodates children from 4 to 65 lb in harness mode and up to 120 lb as a booster\. Britax One4Life Slim ClickTight All\-in\-One Car Seat: The maker lists rear\-facing to 50 lbs, forward\-facing harness to 65 lbs, and high\-back belt\-positioning booster to 120 lbs\. Chicco OneFit LX ClearTex: The seat converts from rear\-facing harness \(5\-40 lbs\) to forward\-facing harness \(26\.5\-65 lbs\) to booster \(40\-100 lbs\)\. Graco SlimFit 3\-in\-1 Narrow All\-in\-One: The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. Maxi\-Cosi Pria Max All\-in\-One Convertible Car Seat: Store data says rear\-facing from 4\-40 pounds, forward\-facing to 65 pounds, and booster up to 100 pounds\. ### 1. [Cybex Callisto G 360 Select](/products/ucp/albeebaby-com/9564456976615) (sold by albeebaby\.com) Accommodates children from 4 to 65 lb in harness mode and up to 120 lb as a booster\. - Booster limits: Accommodates children from 4 to 65 lb in harness mode and up to 120 lb as a booster\. (listing) - Height limit: Maximum child height is 57 inches\. (guide) - Installation: Uses the SafeLock One\-Time Installation System, designed to secure the seat in seconds\. (listing) - Width: - ### 2. [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 limits: The maker lists rear\-facing to 50 lbs, forward\-facing harness to 65 lbs, and high\-back belt\-positioning booster to 120 lbs\. (guide) - Height limit: Britax says the seat grows with the child from 5 to 120 lbs and up to 63 inches tall across rear\-facing, forward\-facing and booster use\. (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) - Width: The seat is 17\.5 inches wide, which the listing says lets you fit three across in most vehicles\. (listing) ### 3. [Chicco OneFit LX ClearTex](/products/ucp/albeebaby-com/9564456714471) (sold by albeebaby\.com) The seat converts from rear\-facing harness \(5\-40 lbs\) to forward\-facing harness \(26\.5\-65 lbs\) to booster \(40\-100 lbs\)\. - Booster limits: The seat converts from rear\-facing harness \(5\-40 lbs\) to forward\-facing harness \(26\.5\-65 lbs\) to booster \(40\-100 lbs\)\. (listing) - Height limit: Height limits are 43 in \(109 cm\) rear\-facing, 54 in \(137 cm\) forward\-facing and 57 in \(145 cm\) in booster mode\. (listing) - Installation: The forward\-facing belt install is described as open, route, close, with the belt routed through easy\-access belt guides\. (guide) - Width: - ### 4. [Graco SlimFit 3\-in\-1 Narrow All\-in\-One](/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 limits: The seat is rear\-facing 5\-40 lb, forward\-facing 22\-65 lb, and belt\-positioning booster 30\-100 lb\. (listing) - Height limit: - - Installation: Installation is very easy and instructions are easy to understand; it has premium push\-on LATCH connectors\. (blog) - Width: Rotating cup holders rotate away to make the seat about 10% slimmer\. (listing) ### 5. [Maxi\-Cosi Pria Max All\-in\-One Convertible Car Seat](/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 limits: Store data says rear\-facing from 4\-40 pounds, forward\-facing to 65 pounds, and booster up to 100 pounds\. (listing) - Height limit: - - Installation: The owner center provides step\-by\-step installation videos and detailed installation manuals\. (manual) - Width: - 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 2026-10-10T23:49:20.351Z. 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)