How Long an All-in-One Car Seat Lasts Before a Child Outgrows It
How long can a child use an all-in-one car seat before outgrowing it, and what are the weight and height limits for each mode?
Cybex Callisto G 360: The maker says the seat is for newborns up to about 10 years, from 4 lb to 120 lb, with a maximum child height of 57 in, in the all-in-one convertible group. Booster mode: In booster mode the child must weigh between 40 and 120 lb, be between 43.3 and 57 in tall, and be at least 4 years old. Britax One4Life ClickTight All-in-One Car Seat: Britax states it grows with a child from 5 to 120 lb and up to 63 in tall. Rear-facing: Rear-facing use is for children weighing 5 to 50 lb. Maxi-Cosi Kani 4-in-One Convertible Car Seat: The Kani has four modes from birth to 10 years: rear-facing 5–40 lb, forward-facing 22–65 lb, belt-positioning booster 40–100 lb and backless booster 40–100 lb. Maxi-Cosi Andi 360° Rotating All-in-One Convertible Car Seat: A store walkthrough says an infant insert supports newborns from 5 lb and is removed around 22 lb, while the seat can be used up to 100 lb. Modes: Rear-facing: 5–40 lb and 19–40 in; forward-facing: 22–65 lb and 34.4–49 in; booster: 40–100 lb and 43.4–52 in.
| Product | Why | Overall range | Rear-facing limit | Booster limits |
|---|---|---|---|---|
| 1. Cybex Callisto G 360 sold by lovemedobaby.com | The maker says the seat is for newborns up to about 10 years, from 4 lb to 120 lb, with a maximum child height of 57 in, in the all-in-one convertible group. | The maker says the seat is for newborns up to about 10 years, from 4 lb to 120 lb, with a maximum child height of 57 in, in the all-in-one convertible group. guide | - | In booster mode the child must weigh between 40 and 120 lb, be between 43.3 and 57 in tall, and be at least 4 years old. manual |
| 2. Britax One4Life ClickTight All-in-One Car Seat sold by lovemedobaby.com | Britax states it grows with a child from 5 to 120 lb and up to 63 in tall. | Britax states it grows with a child from 5 to 120 lb and up to 63 in tall. listing | Rear-facing use is for children weighing 5 to 50 lb. manual | - |
| 3. Maxi-Cosi Kani 4-in-One Convertible Car Seat sold by lovemedobaby.com | The Kani has four modes from birth to 10 years: rear-facing 5–40 lb, forward-facing 22–65 lb, belt-positioning booster 40–100 lb and backless booster 40–100 lb. | The Kani has four modes from birth to 10 years: rear-facing 5–40 lb, forward-facing 22–65 lb, belt-positioning booster 40–100 lb and backless booster 40–100 lb. guide | The Kani has four modes from birth to 10 years: rear-facing 5–40 lb, forward-facing 22–65 lb, belt-positioning booster 40–100 lb and backless booster 40–100 lb. guide | The Kani has four modes from birth to 10 years: rear-facing 5–40 lb, forward-facing 22–65 lb, belt-positioning booster 40–100 lb and backless booster 40–100 lb. guide |
| 4. Maxi-Cosi Andi 360° Rotating All-in-One Convertible Car Seat sold by lovemedobaby.com | A store walkthrough says an infant insert supports newborns from 5 lb and is removed around 22 lb, while the seat can be used up to 100 lb. | A store walkthrough says an infant insert supports newborns from 5 lb and is removed around 22 lb, while the seat can be used up to 100 lb. review | Rear-facing: 5–40 lb and 19–40 in; forward-facing: 22–65 lb and 34.4–49 in; booster: 40–100 lb and 43.4–52 in. listing | Rear-facing: 5–40 lb and 19–40 in; forward-facing: 22–65 lb and 34.4–49 in; booster: 40–100 lb and 43.4–52 in. listing |
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 2026-10-28T21:28:20.656Z.
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.