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  • Graco Nautilus 3-in-1 Car Seat, Matrix
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Graco Nautilus 3-in-1 Car Seat, Matrix

by Graco
| 197 answered questions

Price: $139.00 & FREE Shipping. FREE Returns. Details
In Stock.
Ships from and sold by Amazon.com in easy-to-open packaging. Gift-wrap available.
  • 3 in 1 multi-mode Car Seat for longer use 20 pounds to 100 pounds
  • Extended 5-point harness for children 20 to 65 pounds
  • Converts to High back belt positioning booster for child 30 pounds to 100 pounds
  • Converts to backless booster for child 40 pounds to 100 pounds
  • Steel reinforced frame for durability
  • 3-in-1 multi-mode Car Seat for longer use 20 pounds to 100 pounds
  • Extended 5-point harness for children 20-65 pounds
  • Converts to High-back belt positioning booster for child 30 pounds to 100 pounds
See more product details
6 new from $139.00 2 open box from $113.98
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Graco Nautilus 3-in-1 Car Seat

The one thing they won't outgrow. Shop Now.
$139.00 & FREE Shipping. FREE Returns. Details In Stock. Ships from and sold by Amazon.com in easy-to-open packaging. Gift-wrap available.

Frequently Bought Together

Graco Nautilus 3-in-1 Car Seat, Matrix + Munchkin Auto Seat Protector, 1 Count + Munchkin Backseat Organizer, Black
Price for all three: $160.55

Buy the selected items together

Product Information

Color: Matrix
Technical Details
Item Weight21 pounds
Product Dimensions22 x 20 x 29 inches
Item model number8J00MTX
Minimum weight recommendation20 Pounds
Maximum weight recommendation100 Pounds
Minimum height recommendation27 inches
Maximum height recommendation57 inches
Care instructionsMachine washable pad
Specification metcertified frustration-free
Seat weight without base19.5 Pounds
Seat base/foot width20 inches
OrientationForward Facing
Forward-facing minimum child weight20 Pounds
Forward-facing maximum child weight100 Pounds
Harness type5 pt
Additional Information
Best Sellers Rank #39 in Baby (See top 100)
Shipping Weight24.4 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S.
Shipping Advisory:This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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Product Description

Color: Matrix

Product Description

The Graco Nautilus Car Seat is a 3 in 1 multi mode car seat for children 20 pounds to 100 pounds. This is the last car seat you will need to buy for your child. The Nautilus is ideal for your children from one to ten years old. First, it is an extended 5 point harness seat for children 20 to 65 pounds that features an easy to install system with a lock off buckle for easy secure installation. Second, it works as a high back booster for children 30 pounds to 100 pounds, and finally as a backless booster for children 40 pounds to 100 pounds. The Nautilus Car Seat has a steel reinforced frame for durability, and has a 3 position recline for proper installation and comfort. The car seat offers easy access storage and cup holders for your childand#8217;s enjoyment. Nautilus transforms into three modes to go the distance.


Top-rated by leading consumer publications, the Graco Nautilus 3-in-1 Car Seat grows with your child by offering three forward-facing positions. Designed for children 20 to 100 pounds, the Nautilus transitions from a harness booster to a highback belt-positioning booster and finally to a backless belt-positioning booster seat. This LATCH-equipped seat is outfitted with reinforced steel, and features a three-position recline and height-adjustable headrest to help make every ride more enjoyable.

callout top with logo
Nautilus 3-in-1 Car Seat
At a Glance:
  • Converts from harnessed booster seat to highback and backless booster
  • Side-impact tested with EPS energy-absorbing foam and a steel-reinforced frame
  • Height-adjustable headrest and three-position recline keep your child comfortable
  • Contoured, padded armrests feature an integrated cup holder and storage pockets
  • Open-loop belt guides for correct vehicle belt positioning in belt positioning booster mode
Age/Weight Requirements:

Five-point harness use from 20 to 65 pounds; high-back booster from 30 to 100 pounds; backless booster from 40 to 100 pounds


Limited 1-year warranty

Nautilus 3-in-1 Car Seat Product Shot

This seat is seat LATCH-equipped to work with your vehicle's LATCH system for easy installation. View larger.

#1 Logo
Graco's Commitment to Safety

In addition to meeting or exceeding all US safety standards, the Nautilus 3-in-1 car seat has been side impact tested for occupant retention with the built in 5-point harness system and in high back belt positioning booster mode to keep your child secure in a side-impact collision. This car seat features EPS, energy absorbing foam for effective energy management in the event of collision.

The Nautilus has been tested for structural integrity at both high and low temperatures. Because the interior temperature of your vehicle can vary significantly by season, it is important to maintain the structural integrity of the car seat when subjected to these temperature extremes. Its color coded open-loop belt guides also help ensure your vehicle belt is properly routed to secure your child.

3-in-1 Design Grows with Your Child

The Nautilus is designed for children from 20 to 100 pounds, allowing five-point harness use up to 65 pounds. As your child grows, the seat transitions into a highback belt-positioning booster, then finally into a backless belt-positioning booster for a comfortable fit up to 100 pounds.

Nautilus 3-in-1 Car Seat Lifestyle ShotNautilus 3-in-1 Car Seat Lifestyle ShotNautilus 3-in-1 Car Seat Lifestyle Shot
Comfort and Fit Features Developed With Your Child in Mind

The Nautilus adapts to keep your child comfortable, offering a three-position recline and a height-adjustable headrest you can easily move with one hand to accomodate your child's needs.

Contoured, padded armrests offer additional comfort on long rides. The integrated cup holder and storage pockets for snacks and small toys keep your child's favorite things always within an arm's reach.

LATCH Compatible for Easy Installation

Nautilus makes it easy to secure your child properly thanks to open-loop belt guides that help you correctly position the vehicle's seat belt.

The seat is also LATCH-equipped to work with your vehicle's LATCH system for easy installation or can be installed using your vehicle's safety belt giving you the confidence of proper installation.

Machine-Washable Cushion and Cover for Easy Cleaning

The Nautilus features a machine-washable cover and seat cushion. Metal and plastic parts can be washed with mild soap and water, while the buckle and harness strap clean up quickly with a damp cloth.

The Graco Nautilus 3-in-1 Car Seat is backed by a manufacturer's limited one-year warranty.


The Nautilus 3-in-1 measures 29 by 20 by 22 inches (H x W x D) and weighs 26 pounds.

What's in the Box

Graco Nautilus 3-in-1 Car Seat.

Matrix Header Logo

Weight in lbs.
























Infant seats
(used Rear-Facing only)


SnugRide 30

SnugRide 35

5--- REAR-FACING ---22

4------------ REAR-FACING ------------30

4--------------- REAR-FACING ---------------35

Convertible seats
(used Rear-Facing or


Classic Ride 50

My Ride 65

My Ride 65
with Safety Surround

5----------- REAR-FACING -----------30

4------------------- REAR-FACING -------------------40
20--------- FORWARD-FACING ---------50

5---------------- REAR-FACING -----------------40
20--------------- FORWARD-FACING ---------------65

4------------------- REAR-FACING -------------------40
20--------------- FORWARD-FACING ---------------65

All-in-One seats
(used Rear-Facing/
Forward-Facing or as a
Belt-Positioning Booster)


5---------------- REAR-FACING ----------------40
20--------------- FORWARD-FACING ---------------65
30-------------------- BELT POSITIONING BOOSTER --------------------100

Harness Booster seats
(used Forward-Facing only)


20--------------- FORWARD-FACING ---------------65
30-------------------- BELT-POSITIONING BOOSTER --------------------100

Booster seats
(used Forward-Facing only)

Highback TurboBooster

Backless TurboBooster

30-------------------- BELT-POSITIONING BOOSTER --------------------100

40--------------- BELT-POSITIONING BOOSTER ---------------100

Trademark Information:



Customer Questions & Answers

Customer Reviews

She loves the cup holder and toy cubbies.
T. Pitts
This has been a great car seat and we love the fact that we won't have to buy another one for our daughter.
It's easy to install and very comfortable.

Most Helpful Customer Reviews

2,194 of 2,278 people found the following review helpful By P. moore on May 19, 2009
Color Name: Matrix
I own 2 Britax Frontiers in Pink, and the Graco Nautilus in pink as well. As a Mother who owns both models, I will tell you the major differences between these two seats from my point of view.
#1 Frontier is more expensive (which is why I got the Nautilus for my spare)
#2 Frontier is SO much easier to adjust the shoulder height strap. With a simple squeeze of a lever, the straps go up. The Graco needs to be rethreaded. This is BIG pain when you have another child who wants to use the seat. With the Frontier, it is no biggie to pull the lever.
#3 Frontier seat material is prone to wear where the child's bottom and legs rub on the seat. It also shows WAY more stains and soaks up spills quicker than the Graco.
#4 Frontier has 3 crotch strap adjustments for easy fitting. The Graco only has 2 which makes the older kids sit on the strap. This can get uncomfortable. My oldest DD takes the pad off of the crotch strap on the Frontier (she says it makes the seat look like a "baby seat" with the pad), but she can not do this with the Graco, as the crotch strap rubs on her legs causing red irritation when wearing shorts. The graco pad is very thick and wraps the entire strap (between the legs) and then goes up to sit on the belly. She does not seem to mind sitting on it, but it does not look too comfortable to me.
#5 Padding on Frontier is WAY thicker (on both seat and seat back)and more comfortable to sit on. I can't imagine that the Graco would be comfortable for long trips.
#6 Heads slump forward for younger kids when sleeping in the Graco. The "wings" around the head are very fat (giving the appearance of a "yonger child's seat") and are so close to the child's head that it causes it to go forward when sleeping.
Read more ›
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543 of 564 people found the following review helpful By Mjolnir on March 25, 2013
Color Name: Matrix Verified Purchase
Many reviewers have commented here that the crotch strap is incredibly short. I spent some time agonizing before I finally ordered, since I did not want to have to return it. But it turns out, the crotch strap is plenty long. I even bought a second one for my other child. Here's what you need to do.

1. Once your child is too large for the smallest setting on the 5 point harness, follow the instructions to REMOVE THE BODY SUPPORT. This is the thing that looks like extra padding in what would be the lumbar region if you could somehow squeeze an adult into the seat. In my copy of the manual it is shown on page 6 under "Features". If you fail to REMOVE THE BODY SUPPORT, yes, indeed, the crotch strap appears to be ridiculously short. So, in conclusion, REMOVE THE BODY SUPPORT per the instructions.

2. Also, as many have commented, move the crotch strap to the second slot. Make sure you are using the second slot in the hard plastic base, not just the second slot in the fabric insert.

3. Congratulations, you now have a ton of space in the crotchular region. I have a 56 lb 43 inch tall son who, even while wearing ski pants, fits just fine in the seat when configured according to points 1 and 2. He is not 'sitting on' the crotch buckle as so many have alleged. I think a child who doesn't have enough room is likely too large for the weight limit on the harness anyway, in which case you remove the harness and migrate to #2 of the "3-in-1" scheme and secure the child in the booster with the vehicle belt.

The kids love them.
The price is right. They are quite a bit cheaper than the corresponding Britax model.
Read more ›
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514 of 577 people found the following review helpful By Dad of two boys on January 29, 2009
Color Name: Matrix
The crotch strap.

This seat looked ideal in every way. I liked it right out of the box, and when I put it together. It was exactly what I was looking for.

Then, I sat our average-sized 3 1/2 year old in it, boxed it up and sent it back, very disappointed.

The crotch strap, in the closest position, was beneath the back of my son's crotch. In the farther (and only other) position, it was even with, and slightly pressing against, the front of my son's crotch. In other words, no room to grow whatsoever. There is no way possible that this seat would allow my son to sit comfortably in a five-point harness all the way up to 65 pounds. At that point, the strap would be well beneath his crotch and be uncomfortable and dangerous. No way... and I really wanted it to. If there was one additional slot for the strap, an inch or so farther out, this seat would be PERFECT, in my opinion.

So, I gave this seat a 3 out of 5. For a younger child, or one just reaching my son's age and size (again, he is very average in weight, height), I would probably rate this seat a 5. But, since it clearly will not be able to do what it says it should do, up to 65 pounds, I cannot give it a 5. I honestly don't know how any child can be accomodated in this seat up to 65 pounds, unless they are a very, very skinny 65 pounds.

If Graco updates this seat to add one extra slot an inch or so farther out for the strap, I would buy it again immediately. I was, and am, a little angry that the seat won't work as advertised. Buyer beware; look up the few other comments on the crotch strap first. Then, please, go to the store and "test sit" this seat before buying, and please consider how big your child will be at 3 1/2, or older. Otherwise, you may find the same disapointing fact I did.
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Graco Nautilus 3-in-1 Car Seat, Matrix
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Price: $189.99 $139.00
Ships from and sold by Amazon.com

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