Best Narrow Car Seats – Need 3 In The Back?

looking for the Best Narrow Car Seats? Here is our Top Pick!

My best friend just had her third child, three under 4. All of them are in car seats and when they brought the youngest home, they weren’t sure how they were going to fit an infant car seat in the back with two convertible car seats. So I did my research to find her the best narrow car seat configuration for three.

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Types Of Narrow Car Seats

You need to know before going forward and finding the car seat that will fit your car and your lifestyle the specific kind that your child will need.

  • Infant Car Seats
  • Convertible Car Seats
  • 3 – In – 1 Car Seats
  • Booster Car Seats

I’ll go ahead and cover each and every type of car seat so you can find the perfect one for your child and your vehicle. (because let’s face it – it’s cheaper to gt a narrow car seat than it is to get a bigger car)

You can get any of these car seats in two days with Amazon Prime. Don’t have Prime yet? Try a 30 Day Free Trial and order your car seats!

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The Best Narrow Car Seats

We are taking the top 3 from each of the types of narrow car seats and listing them for you here. You can find the extended reviews for more of our favorite and best narrow car seats below.

The Best Narrow Infant Car Seats

This list is in no particular order ,we are just bringing you the best, safe, and narrow car seats for you to make a final decision on.

But if we did have to choose one to be the ultimate winner it would be..

Let’s look at the specs for this little guy. The width of the UPPABaby Mesa is 17 inches with its base width.

What WE Love About It: The first car seat to pass all the tests in safety without having harsh fire retardant chemicals.

UPPABaby Mesa Narrow Infant Car Seat

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2. Chicco Key Fit 30 Infant Car Seat

The Chicco Key Fit 30 infant car seat has a base width of 17 inches and its top feature that parents love is the built-in levels that can be adjusted to recline the baby.

Pros
  • Can hold max weight for 30 pounds, adjustable 5 point harness, removable newborn headrest cushion
Cons
  • Usually used for the first six months, and then baby gets to tall for the car seat making you have to purchase another rear facing car seat

What WE Love About It: When you click into the base and unclick it to put it into the stroller it makes almost no noise, making it an easy transition for your sleeping infant.

Chicco Key Fit 30 Infant Car Seat

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3. Graco SnugRide SnugLock 30 Infant Car Seat

The Graco SnugRide narrow infant car seat is one of the best because its base width is 16.5 inches. That half-inch really makes a difference when you need to install multiple car seats in the back seat.

Pros: One-step adjustment base, easy click on and off, and very lightweight without sacrificing safety.

Cons: The baby head cushion for newborns make some baby’s very sweaty.

What WE Love About It: Rated 4.5 Stars from most parents, and the best part is it is compatible with almost every Graco stroller.

Graco SnugRide SnugLock 30 Infant Car Seat

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4. Safety 1st OnBoard 35 Infant Car Seat

With only 19 inches as its width based the Safety 1st OnBoard narrow infant car seat is a little larger than the others but it does have smaller base widths than most leading car seats.

Pros: 5 features of safety, can accommodate a four-pound newborn up to a 35-pound rear view facing toddler.

Cons: Parents have complained about the little canopy not staying in place when they move it over the baby.

What We Love About It: It can fit and latch onto multiple strollers not just the Safety 1st brand but also Eddie Bauer and Cosco strollers. Making it one that can be used over and over.

Safety 1st OnBoard 35 Infant Car Seat

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5. Cybex Aton 2 Child Car Seat

This child car seat is really amazing, not only is it different because of the recline position it allows your newborn to be in. It is also ultra lightweight. It’s narrow with only 17 inches to use up in your car as the bottom.

Pros: As safe without the base as with the base. The Linear Side-impact Protection absorbs the energy in case of a side-impact and it’s a lightweight carrier.

Cons: You will need certain adapters to use this car seat with other strollers.

What We Love About It: The super lightweight makes this easy for parents to carry with their newborn in toe.

Cybex Aton 2 Child Car Seat

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Top Narrow Convertible Car Seats

1. Cleck Foonf Convertible Narrow Car Seat

The Cleck Foonf (yes it has a funny name) but you won’t laugh at the small width of this car seat with only 16.9 inches. It is also ‘built like a tank’ with a sub-metal frame.

Pros: Can be used for toddlers and pre-k kids up to 50 pounds. It has revolutionized top-of-the-line tech to make an accident safer for the child riding forward-facing.

Cons: It’s pretty expensive but we think it so damn worth it and it’s a little difficult to install in the car.

What We Love About It: Once the car seat is installed it is in for good and you know that it is very safe.

Cleck Foonf Convertible Narrow Car Seat

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2. Diono Radian 3RXT Convertible Car Seats

For being a convertible car seat the Diono Radian 3RXT is saving space by having a 17-inch base that can fit kids up to 5 pounds when they are rear-facing.

Pros: It can be rear-facing until your child reaches 45 pounds and then you can use the booster part up to 120 pounds! You literally never have to buy another car seat.

Cons: we have no cons for this one. It is our favorite on this list (shh don’t tell the others) But it is in the 300 dollar range. If you see this below that GRAB IT. (see the current price here)

What We Love About It: It’s the first car seat with a 10-year plan that it will grow with your child from rear-facing

to be

in a booster!

Diono Radian 3RXT Convertible Car Seats

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3. Combi Coccoro Streamlined Light Weight

With the smallest base around at just 15.5 inches the Combi Coccoro lightweight convertible car seat is the narrowest one on our list so far.

Pros: Perfect for rear facing, and grows with your child.

Cons: The width of the car seat expands as you go up to 25 inches in width.

What We Love About It: The Coccoro Convertible Car Seat was designed with small spaces in mind. At 15.5 inches in width, the Cocorro easily installs in tighter spaces and smaller cars. This creates an easier installation, allows for “Three Across Installation” and also easier portability.

Combi Coccoro Streamlined Light Weight

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4. Primo Viaggio 4/35 Nido Narrow Convertible Car Seat

The Primo Viaggio narrow convertible car seat is on this list because its base width is 14.5 and the car seat itself is 17 inches in width.

Pros: Can be a perfect rear facing convertible car seats for your infant and can work for your toddler as it goes up to 35 pounds for max weight.

Cons: It’s pretty heavy on its own without even housing your newborn

What We Love About It: You can easily move the newborn and infant sides if your baby starts growing to big for them. It doesn’t stop the quality and side impact control of the car seat.

Primo Viaggio 4/35 Nido Narrow Convertible Car Seat

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See the current reviews for this car seat.

5. Graco SlimFit 3 – in – 1 Convertible Narrow Car Seat

It’s in the name Graco SlimFit this car seat is SLIM and it is proven by other parents that you can use it to fit 3 across in the back seat of your car – even if you have a compact car.

Pros: Graco states it’s the only car seat you will ever need to buy. From rear-facing starting at 5 pounds to a booster seat that will be 100 pounds.

Cons: The largest width in car seat bases on our list coming in at 19.88 inches in width.

What We Love About It: With its steel frame, it is still not heavy without sacrificing safety for the baby.

Graco SlimFit 3 - in - 1 Convertible Narrow Car Seat

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6. Graco Milestone 3 – in – 1 Convertible Car Seats

We love the Graco Milestone 3 – in – 1 (it’s the one we use now for our toddler) because we have a pretty small compact car.

Pros: Width is only 17.5 inches and it comes with a freaking cup holder Oh yeah!

Cons: It’s a little difficult to switch it out of your car into another car. It does not come with a base.

What We Love About It: You can move the cup holder off when you need to fit multiple car seats in the back and it is super easy to put it back on if you have the space for it.

Graco Milestone 3 - in - 1 Convertible Car Seats

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Narrowest Booster Seats On The Market

1. Chicco KidFit 2 – in – 1 Booster Seat

For a narrow booster seat, it only has 19 inches in width that can let your bigger kid feel comfortable but still have room for another two car seats or for more space in the back seat. Perfect for compact cars

Pros: The combined head and shoulder side-impact protection come with 10 positions for growing children. The attachment and one-pull tightener helps keep KidFit in place and kid-ready for easy in/out/

Cons: After washing the cover parents noticed a slight shrinkage.

What We Love: The cup holders fold in when not in use making it even smaller in width to really save space for 3 in the back seat.

Chicco KidFit 2 - in - 1 Booster Seat

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2. Maxi-Cosi Rodifix Narrow Booster Seat

The Maxi-Cosi booster seat has a small base but gets larger as you go up. At its biggest width, the seat is 17.75 inches in width. Making it small and perfect for compact cars. (you can see one parent review it here who has a Tesla and couldn’t find car seats that would fit in such a compact vehicle. )

Pros: Can hold up to 120 pounds or 57 inches in height. Whichever comes first.

Cons: Can start using after the child reaches 40 pounds.

What We Love: Fits almost all compact and small back seat cars.

Maxi-Cosi Rodifix Narrow Booster Seat

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3. Cosco Finale DX 2- in – 1 Booster Seat

The Cosco Finale DX booster seat is also a convertible car seat that measures 18 inches in width making it possible to fit 3 across if you have all children in car seats.

Pros: Can be used with the 5 point harness and latch to cars once the child is over 50 pounds can switch to car seat belt and remove the harness.

Cons: Only made for forward-facing no rear-facing.

What We Love: Cheaper alternative to other ones on this list.

Cosco Finale DX 2- in - 1 Booster Seat

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4. Graco TurboBooster Backless

The Graco TurboBackless comes in at 17 inches wide. Making it a perfect booster seat for your big kid.

Pros: One-hand front-adjust Latch system secures booster to the vehicle seat. Secure connection keeps booster seat properly in place while the seat is unoccupied

Cons: No cons for this booster seat. Almost everyone who has bought it has given it a 5-4.5 star review. You can see the reviews here.

What We Love: We love the super easy latch system and that you can use this car seat booster to fit 3 across, even if you have one infant car seat plus a convertible car seat.

Graco TurboBooster Backless

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The Best Narrow Car Seats By Manufacturer

Graco Brand Car Seats That Are Narrow Fit 3 Across

SnugRide SnugLock Infant Car Seat

Slim Fit Convertible Car Seat

Milestone 3 – in – 1 Convertible Car Seat

Turbo Backless Booster

Chicco Brand Car Seats That Are Narrow Fit 3 Across

KeyFit 30 Infant Car Seat

Kid Fit Booster Seat

Detailed Comparison Of Our Top 3 Narrow Car Seats From Each Section

Car SeatWidth BaseMaximum WeightMinimum WeightStar Reviews From Parents:
UPPABABY Infant17 inches3544.5
Chicco KeyFit 30 Infant17 inches3045
Graco SnugRide SnugLock 30 Infant16.53044.5
Clek Foonf Convertible16.950144.8
Diono Radian 3RXT1712054.8
Combi Coccoro Convertible15.54033.9
Chicco KidFit 2 Booster19100304.7
Maxi-Cosi Rodifix Booster17.75120404.4
Cosco Finale DX Booster1865-10030-504.4

Common Questions About Narrow Car Seats

Are Narrow Car Seats Not As Safe?

Every car seat on this list has been tested and tried and has passed numerous tests in order to be able to be put on the market for you and your family. Narrow car seats are just as safe as their bigger car seat friends.

How To Choose The Best Narrow Car Seat

When you’re looking for a narrow car seat chances are high that you need to fit multiple kids in car seats in the back or you have a small compact car.

Because of this when choosing your car seat you should look for these things:

  • Easy instillation
  • Width of base
  • Width of largest part
  • Budget
  • Comfort for your child

Are Booster Seats Smaller Than Car Seats?

Yes, booster seats tend to be smaller than car seats because they do not have the 5 point harness to hold the baby in place. A booster seat is made for a larger child that will use the car seat belt along with sitting in the booster seat.

Is It Okay To Buy A Used Car Seat?

It is safer to buy a new car seat, if you do buy a used one please make sure that it is not expired. Car seats do expire and you do not want one that has gone past its due date.

You will also want to make sure you get the history of the car seat; has it been in any accidents, did any parts come off, how long was the child using this car seat?

Do Booster Seats Need To Be Anchored?

Booster seats do not need to be anchored as the seat belt that the child will wear across while sitting on the booster seat should be enough. You can however anchor and latch your booster seat if the seat comes with the proper latch items.

If you’d like to learn more about car seat safety and what age booster, car seats, convertible car seats are best for your child. I suggest you go and read this article from Healthy Children. Org


In conclusion

The best car narrow car seat for you and your family can be either an infant car seat if your child is still an infant, a convertible car seat, or a booster seat for toddlers and older children.

Let us know which car seat you went with, we’d love to hear from you in the comments below.

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the best narrow car seats for this year
the best narrow car seats for big families
the best narrow car seats from infant to booster and convertible car seats

The Best Narrow Car Seats From Infant To Booster and Convertibles (fit 3 in the backseat easily)

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