All-in-one (4-in-1) car seats

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Rear-facing → forward-facing harness → high-back booster → backless booster in one seat. Birth-to-booster value; bulkier.

Short answer: Going by each maker's manual, the highest rear-facing limit here is 50 lb (4 of the 11 seats). The forward-facing harness goes up to 65 lb, high-back booster mode up to 120 lb, and backless booster mode up to 120 lb on the 2 seats that have it. Useful life is 10 to 12 years where the manual gives one.

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.

Last verified 2026-06-11 · 11 models

Car seat	Stage	Narrow (3-across)	Ext. rear-facing	FAA	Lightweight	Buy
Graco 4Ever DLX 4-in-1All-in-one4–120 lb	All-in-one	–	✓	✓	–	See price on Amazon
Britax One4Life ClickTightAll-in-one5–120 lb	All-in-one	–	✓	✓	–	See price on Amazon
Graco TriRide 3-in-1All-in-one5–100 lb	All-in-one	–	✓	✓	–	See price on Amazon
Chicco Fit4 4-in-1All-in-one4–100 lb	All-in-one	–	✓	✓	–	See price on Amazon
Evenflo EveryStage DLXAll-in-one4–120 lb	All-in-one	–	✓	✓	–	See price on Amazon
Graco Grows4Me 4-in-1All-in-one5–110 lb	All-in-one	–	✓	✓	–	See price on Amazon
Safety 1st Grow and Go All-in-OneAll-in-one5–100 lb	All-in-one	–	✓	✓	–	See price on Amazon
Evenflo Revolve360 ExtendAll-in-one4–120 lb	All-in-one	–	✓	–	–	See price on Amazon
Maxi-Cosi Magellan LiftFitAll-in-one5–100 lb	All-in-one	–	✓	✓	–	See price on Amazon
Nuna EXECAll-in-one5–120 lb	All-in-one	–	✓	✓	–	See price on Amazon
Evenflo Symphony DLXAll-in-one5–110 lb	All-in-one	–	✓	✓	–	See price on Amazon

Also cover all three modes

These are sold as convertibles, but each one's own manual prints a booster mode too — so by published spec they take a child from rear-facing through to a belt-positioning booster, the same span as the seats above. We keep each seat filed under the stage its maker sells it as; check the seat's manual for the booster weight and height limits.

8 models

Car seat	Stage	Narrow (3-across)	Ext. rear-facing	FAA	Lightweight	Buy
Diono Radian 3QXTConvertible4–120 lb	Convertible	✓	✓	✓	–	See price on Amazon
Diono Radian 3RXTConvertible5–120 lb	Convertible	✓	✓	✓	–	See price on Amazon
Graco SlimFit3 LXConvertible5–100 lb	Convertible	✓	–	✓	–	See price on Amazon
Maxi-Cosi Pria MaxConvertible4–100 lb	Convertible	–	–	✓	–	See price on Amazon
Chicco OneFit ClearTexConvertible5–100 lb	Convertible	–	–	✓	–	See price on Amazon
Safety 1st Grow and Go SprintConvertible5–100 lb	Convertible	–	–	✓	–	See price on Amazon
Diono Radian 3RConvertible5–120 lb	Convertible	✓	–	✓	–	See price on Amazon
Cybex Eternis SConvertible4–120 lb	Convertible	–	✓	✓	–	See price on Amazon

Weight limits and useful life, seat by seat

The weight ranges each maker prints in the seat's manual. Tap a seat to see it side by side with a similar model, with height limits and a link to its manual.

Car seat	Rear-facing	Forward-facing harness	High-back booster	Backless booster	Useful life
Graco 4Ever DLX 4-in-1	4–40 lb	22–65 lb	40–100 lb	40–120 lb	10 yrs
Britax One4Life ClickTight	5–50 lb	30–65 lb	40–120 lb	—	10 yrs
Graco TriRide 3-in-1	5–40 lb	22–65 lb	40–100 lb	—	10 yrs
Chicco Fit4 4-in-1	4–40 lb	25–65 lb	40–100 lb	—	10 yrs
Evenflo EveryStage DLX	4–50 lb	22–65 lb	40–120 lb	—	—
Graco Grows4Me 4-in-1	5–40 lb	22–65 lb	40–100 lb	40–110 lb	10 yrs
Safety 1st Grow and Go All-in-One	5–40 lb	30–65 lb	40–100 lb	—	10 yrs
Evenflo Revolve360 Extend	4–50 lb	22–65 lb	40–120 lb	—	—
Maxi-Cosi Magellan LiftFit	5–40 lb	22–65 lb	40–100 lb	—	12 yrs
Nuna EXEC	5–50 lb	25–65 lb	40–120 lb	—	10 yrs
Evenflo Symphony DLX	5–40 lb	22–65 lb	40–110 lb	—	—

“—” means the manual we cite gives no figure for that mode. Useful life counts from the date of manufacture unless it says “from purchase”. How these are sourced

Common questions

Which all-in-one car seats have the highest rear-facing weight limit?

The Britax One4Life ClickTight, the Evenflo EveryStage DLX, the Evenflo Revolve360 Extend and the Nuna EXEC list a rear-facing limit of 50 lb, the highest here. The lowest is 40 lb (the Graco 4Ever DLX 4-in-1, the Graco TriRide 3-in-1, the Chicco Fit4 4-in-1 and 4 more). These are the makers' printed limits; your child's height also has to fit.

How heavy can a child be in the forward-facing harness?

All 11 seats here with a forward-facing harness list 65 lb as the harness limit.

Up to what weight can these be used as a booster?

In high-back booster mode the maximum is between 100 and 120 lb; the Britax One4Life ClickTight, the Evenflo EveryStage DLX, the Evenflo Revolve360 Extend and the Nuna EXEC go to 120 lb. As a backless booster the maximum is between 110 and 120 lb. A booster also needs the seat belt to fit your child, so check the height range in the manual too.

How long do all-in-one car seats last before they expire?

The manuals list a useful life of 10 to 12 years. In the manuals we cite, it counts from the date of manufacture, which is printed on the seat's label. For 3 of the 11, the manual we cite gives no figure, so check the label on the seat. More by brand on car seat expiration.

Which of these all-in-one car seats can be used on a plane?

10 of the 11 are FAA-approved for use on aircraft: the Graco 4Ever DLX 4-in-1, the Britax One4Life ClickTight, the Graco TriRide 3-in-1, the Chicco Fit4 4-in-1, the Evenflo EveryStage DLX, the Graco Grows4Me 4-in-1, the Safety 1st Grow and Go All-in-One, the Maxi-Cosi Magellan LiftFit, the Nuna EXEC and the Evenflo Symphony DLX. Boosters are never approved for planes, because a plane seat has no shoulder belt.

Other stages: Infant · Convertible · Booster · narrow seats for 3-across