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6 Best 3-In-1 Car Seats

A 3-in-1 convertible car seat is the go-to for most parents because it is cost-efficient and packs numerous features, such as an advanced safety steel frame and padded seats. If you’ve been looking for the most suitable convertible car seat for your child, then you’re at the right place. We have reviewed the best 3-in-1 car seats according to customer reviews and safety tests.

6 Best 3-In-1 Car Seats


Best 3-In-1 Car Seats Price
Diono Radian 3R, 3-in-1 Convertible Rear and Forward Facing Convertible Car Seat $199.99
Graco Nautilus 65 LX 3-in-1 Harness Booster Car Seat, Featuring TrueShield Side Impact Technology $179.99
Graco SlimFit 3 In 1 Car Seat -Slim & Comfy Design Saves Space in Your Back Seat, Darcie, One Size $139.99
Disney Baby Grow & Go 3-in-1 Convertible Car Seat, Simply Minnie $183.90
Graco Tranzitions 3 In 1 Harness Booster Seat, Proof $98.99
Britax Marathon ClickTight Convertible Car Seat $299.99


Diono Radian 3R, 3-in-1 Convertible Rear and Forward Facing Convertible Car Seat

Diono Radian 3R, 3-in-1 Convertible Rear and Forward Facing Convertible Car Seat

Price: $199.99

The Diono radian 3R 3-in-1 convertible car seat is packed with countless features and functions that are designed to keep your child comfortable for all their years before advancing to the adult seat belt.

These features include the excessive gain booster, bolstered metal core, and enhanced safety features that ensure the security of your child in small and big crashes.

To start with, the aforementioned excessive gain booster makes this car seat perfect for your child up to 120 lbs. This ensures that your child is comfortable on long rides across the city and states.

We believe that it is important to have a car seat that can accommodate just anyone, so your child is comfy.

The bolstered mechanically engineered metal core is made from high grade density plastic to not only ensure high durability but also improve the safety of your child whenever there is a crash or accident.

This safety improvement has been tested and approved by the United States and its supporting organizations.

Parents who have used this car seat have testified to the powerful protective support that this metal provides, which provides them with enough peace of mind on rough roads.

Additionally, the reinforced sidewalls provide extra protection for your kids in case of a collision out of nowhere.


● Straightforward installation

● Enhanced impact resistance

● Very narrow for multiple installations in a single car


● Car seat is heavy

Graco Nautilus 65 LX 3-in-1 Harness Booster Car Seat

Graco Nautilus 65 LX 3-in-1 Harness Booster Car Seat

Price: $179.99

Just as it is stated in its name, the Graco Nautilus 65 LX 3-in-1 car seat is divided to fit three age/weight/height groups.

The first division is a forward-facing booster car seat designed to support children between 22 to 65 lbs tightly with its specially designed 5-point harness.

The second division supports children between 30-100 lbs after a quick conversion to a high-back belt-positioning booster, while the third division is a backless booster seat designed to support children between 40-120 lbs.

As your child grows and develops, you’ll find this single car seat very valuable because it continues to support your child, which reduces your financial burden and eliminates the learning curve that comes with every new product.

The 3-in-1 design of this car seat is supported by several features that are well put together to ensure continuity after conversion from one stage to another.

The best feature we love is the straightforward adjustable harness system which allows you to adjust this car seat to suit your child’s preference and height, making it a grow with your child type of car seat.

So, instead of spending a couple of dollars every couple of years, this strong harness system will keep you going.


● Easy installation with click lock feature

● Removable body support for machine wash

● Adjustable recline


● The strap is hard to use

graco slimfit 3 in 1 car seat

Graco SlimFit 3 in 1 Car Seat

Price: $139.99

Are you looking for a car seat that grows with your child and is also durable to retain its strength throughout those years without having to break the bank? Then you have found your gem.

This rear and forward facing 3-in-1 car seat can support children from 5 to 100 pounds, meaning it’ll support your child up to the right age to switch to an adult seat belt.

It is also equipped to protect your kiddo from impact on all sides, 10 position headrests, inright LATH, and a host of other important features to help keep your child comfortable, safe, and to make use very easy for you, the parent.

Talking about safety, the steel reinforced frame is intentionally used to prevent serious damage from crashes, accidents, and collisions on all sides of the vehicle.

The car seat has gone through the most rigorous tests in the United States and surpassed their benchmarks, making it one of the safest car seats for your child.

But that’s all. This car seat is also super comfortable. Aside from the 10-position headrests, the 4-position recline features allows your child to sit comfortably in any position without any health problems to their back.

Additionally, it features rotating cup holders to keep your children hydrated and provide space for more car seats to its sizes.


● Great safety features

● Great option for small cars

● Very easy to install

● Affordable


● nil

Disney Baby Grow & Go 3-in-1 Convertible Car Seat

Disney Baby Grow & Go 3-in-1 Convertible Car Seat

Price: $183.90

This car seat is suitable for toddlers, infants, and preschoolers. It is ergonomically and structurally designed to support children from 5 to 100 pounds.

This means it can be converted from a rear-facing seat to forward facing mode after your child has developed to over 40 pounds, and from that to the belt-positioning booster until your child is over 100 pounds.

One reason why I like a 3-in-1 car seat, aside from cost efficiency, is that the child will get used to it and be very comfortable using the seat as they grow up.

But that doesn’t just happen; a number of features combine to make that possible. The number one factor that keeps this car seat good for long is the machine washable seat cover.

It is removable for washing and drying to remove debris and stains, making it very comfy for your kiddo to use and enjoy throughout the journey. Make sure the cover is properly dried before replacing it to avoid irritation and a mess.

If you are not convinced on why you should wash and dry the covers, then the rotating cup holders should convince you because children are very likely to make a mess with the content in their cups.

Nonetheless, a cup holder is a good attachment because it keeps your kiddo hydrated and refreshed on short and log drives.


● Great design and colors

● Easy to install

● Enhanced safety features


● Anchor connectors need to be improved

● Hard to pull car seat

Graco Tranzitions 3 in 1 Harness Booster Seat

Graco Tranzitions 3 in 1 Harness Booster Seat

Price: $98.99

This lightweight car seat is equipped with everything you’ll need to keep your child safe and comfortable in the backseat as you enjoy your ride.

As with every other 3-in-1 car seat, the Graco Tranzitions 3 in 1 Booster Seat is designed to support any child from 5 to 100 pounds efficiently. No-rethread allows you to adjust the harness and headrest in one motion, saving your time.

Aside from ease of use, your child also enjoys two easy-to-clean cup holders on both sides to keep them hydrated and full with snacks.

Still, on comfortability and flexibility, you’ll like to know that this car seat is equipped with an adjustable headrest to suit your child’s height as they keep growing.

Just by using a one-hand lever, you can switch between 8 positions to ensure complete head comfort for your child of any height. Additionally, the body support not only guarantees comfort but also improves safety for your child.

What’s even more commendable is that you can easily remove the body support as well as the seat pad and seat cover for machine wash to remove germs and keep your child comfortable always.

Aside from your child’s health, this car seat is also designed to keep your child safe as long as they are in the seat with the sturdy and impact-resistant frame.


● Enhanced and tested safety features

● Robust design

● Body support


● No seat padding

● Latch system hardly functions

Britax Marathon ClickTight Convertible Car Seat

Britax Marathon ClickTight Convertible Car Seat

Price: $299.99

Have you been looking for an easy to install 3-in-1 car seat because the remaining have been a little hard to install or come with complex installation processes that’s quite hard for a non-technical person like you to follow?

If so, the patented click tight on this car seat which makes a click when you correctly buckle it will come in handy. No need to read through a whole installation manual, just follow the clicks and you’re good to go.

However, if this is your first time, reading the installation manual won’t hurt. A properly installed car seat is mandatory for your child’s safety.

Talking about security, side impact, impact absorbing base, and a steel frame on the Britax Marathon ClickTight Convertible Car Seat all protect your kiddo from accidents and collisions.


● Enhanced and tested safety features

● Easy to install


● Straps are too short

● Crouch area is too tight

● Slightly expensive


While you’re concerned about cost-efficiency, make sure to look out for important features such as strap design and comfy padded seats.