The Best All in One Car Seats: One Seat for Life

If you're a fresh parent, you're probably startled by the number of restrictions and recommendations regarding car seats. Yet, this is essentially not a bad thing. The regulations exist so that your little one can be secured in traffic the safest way possible.

On the other hand, this means that you will need up to four different car seats until your child reaches the bottom age limit for a safety belt. Whoa! When I first found out about this, I was shocked. Where will I find the money?

Luckily, I was curious enough to search the internet with a fine-tooth comb and find the most cost-efficient offers.

And let me tell you this: The best all in one car seats, they honestly pay off! They deliver quality, durability, safety, and keep you on a budget! So, without any further ado, I provide you my reliable list of the 6 best all-in-one car seats!

Stay tuned!

Top 3 Recommendations

If you're only interested in the top-notch offers, give this top three overview a glance before you start reading the extensive reviews!

Best All-in-one Car Seats on the Market: My Top 6 Choices

Chicco Fit4 4-in-1 Convertible Car Seat -The Most Convenient Use For 10 Years

Chicco is thus far the most widely-known manufacturer of baby equipment. Their products are popular all around the world, and customers often testify to their quality and longevity.

For these reasons, exactly, I believe that Chicco Fit4 4-in-1 Convertible Car Seat is the most reliable choice on the market.

What makes this seat unique is the innovative system that makes it super-easy for us to install, adjust, clean, and generally use the car seat. It follows your baby as he/she grows, yet with every stage, the seat remains equally comfortable and safe. This is possible because the seat is incredibly adjustable, with even nine recline positions and ten headrest positions.

For starters, the seat features a four-in-one design, including a rear facing car seat (from four to sixteen lbs), forward facing car seat (from twelve to forty lbs), forward facing car seat for preschoolers (from twenty-five to sixty-five lbs), and a belt positioning booster (from forty to one hundred lbs).

Thanks to the unique FitKit multi-layered system, you can effortlessly transform the seat from one stage to another, yet if you struggle with the process, scan the QR code on the side for guidance. How convenient, right?

As for the installment, you won't struggle for the slightest bit thanks to the ReclineSure leveling system, force-multiplying SuperCinch tightener(LATCH), RideRight bubble levels, as well as LockSure system for safe belt-tightening.

What is more, I love this seat because it is ultra-safe, having a DuoGuard side impact protection with a sturdy steel frame and EPS foam that surrounds the head and torso.

Notably, the seat meets the federal standards and can be used in an airplane, so you can bring it with you when flying with your infant or toddler.

  • Four-in-one design
  • Easy to install
  • Easy to adjust
  • Safe
  • Convenient
  • Slim design
  • Multi-layered

Diono 2020 Radian 3RXT, 4-in-1 Convertible - The Best SlimFit All-in-One Car Seat

Now I know many parents live in a delusion that having a small car means there's no way you can get a decent convertible, let alone an all-in-one seat. If you're one of them, let me tell you, I feel honored to be your guide through this enlightening journey; meet Diono Radian 3RXT.

Namely, the entire Diono Radian line is convertible SlimFit seats, specially designed to enable you to fit three across. In particular, this one is an all-in-one model, designed to accommodate your precious bundle from birth to the early teen period.

What is more, this model is one of the rare car seats designed to safely accommodate a newborn, thanks to a two-in-one infant positioning liner with an integrated travel wedge.

As your baby grows, simply remove the wedge for more space. With this seat, you can keep your baby rear facing longer until she/he gains fifty pounds.

After that, you can convert the seat into a forward facing harness seat (twenty-two to sixty-five pounds) and a high-back booster (forty to one hundred and twenty pounds).

Safety should not be one of your concerns with Diono Radian 3RXT. It features an automotive-grade steel construction and memory foam, alongside layers of energy-absorbing foam and side-impact safeguard.

With The SuperLatch audible click system, the installation takes no time, and the covers can be removed and washed in the machine.

Finally, this seat meets the federal safety standards and can be used on aircraft, which is incredibly convenient due to its foldable design.

  • SlimFit
  • All-in-one
  • Can be used from birth
  • Safe newborn positioning
  • Rear facing loner
  • Reinforced steel construction
  • FAA-approved
  • /

Graco Grows4Me 4 in 1 Car Seat - The Best-Rated All-in-one Car Seat

We've come to the best-rated all-in-one car seat on Amazon, the fantastic Graco Grows4Me 4 in 1 Car Seat, and it most definitely is worthy of its place on this list.

Graco dominates the market for more than sixty years now, and during that time, it has done nothing but improve. Their equipment is honestly reliable, safe, and convenient, so you can never miss with one of theirs.

I love this seat because it is one of the few car seats with the backless booster mode, if not the only one. Hence, it accommodates your kid in a rear facing, forward facing, high-back booster and backless booster position (5-110 pounds).

Graco made sure that their convertible accommodates your child correctly in every stage with six recline positions and even ten headrest positions.

Additionally, the SimplySafe, one-motion adjustment takes no more than a second of your time to modify the seat. You'll grow to love this feature when you first try to convert your car seat, trust me.

Another great feature of the Graco four-in-one car seat is the LATCH system, enabling an effortless installation, while the unique harness compartment allows you to store the harness when the seat is used in a booster mode.

Most importantly, the seat passed rigorous crash tests ensuring your child will remain intact in the case of frontal, side, or even rollover crashes. Additionally, special tests determined the seats' resistance in extreme temperatures (the seat was not treated with a flame-retardant).

As for the FAA-approval, you can use the Graco 4-in-1 convertible in an airplane in a rear facing and forward facing mode with an internal harness. However, you cannot use it as a booster seat.

  • Four-in-one
  • FAA-approved
  • Passed safety tests
  • Easy to install
  • One-motion system
  • Highly adjustable
  • LATCH-equipped
  • Other models have a ten pounds higher total weight limit

Symphony Elite All-in-One Car Seat - Easy to install and Use

Evenflo is one of the oldest car seat manufacturers on the market. For more than one hundred years, it builds reliable and safe child restraint systems with designs especially adapted to relieve parents' everyday struggles with car seats.

The Symphony Elite All-in-One Car Seat is an all-inclusive model built to follow your child as he/she grows, being thus the only seat you'll need until your little one grows enough for a seatbelt.

The seat includes a rear facing mode, forward facing mode, and belt positioning booster mode. In a rear facing seat, a child from five to forty lbs can ride safely, in the front facing seat from twenty-two to sixty-five lbs and in a booster mode from forty to one hundred and ten pounds.

Thanks to the removable head and body pillows, adjustable headrest, and three recline positions, the seat remains perfectly comfortable for your kid at each stage.

The Symphony Elite, the all-in-one seat, features an innovative latch system, SureLatch, enabling you to easily install the seat, tightly and securely without wiggles and room for motion. What is more, a 5-point InfiniteSlide harness slides effortlessly to allow a secure and accurate fit every time, and quick entry and exit.

When it comes to safety, Evenflo seats exceed the federal crash standards, which means that your little will remain intact in the case of an accident. It features a thick layer of energy-absorbing EPP foam, providing side impact protection.

What is more, the seat is approved for the use in an airplane with an internal harness, so you don't have to buy another one when flying with your child.

  • A car seat for life
  • Ease of use
  • Adjustable
  • Three-in-one design
  • Two cup holders
  • Crash-tested
  • FAA-approved
  • Multiple position recline
  • A bit heavy 

Maxi-Cosi Magellan XP 5-in-1 Convertible Car Seat - European Engineering

Maxi-Cosi Magellan XP presents the ultimate combination of elegant style and super-safe European design. It was built to accommodate your child from infancy up to 10 years of age comfortably thanks to the high adjustability and advanced engineering. Let's see what this seat is all about!

Magellan XP is probably the only convertible car seat on the market with a five-in-one design.

It accommodates an infant in a rear facing position (from five to twenty pounds), then a toddler in the same position (from twenty-two to forty pounds), a toddler in a forward facing position (from twenty-two to sixty-five pounds), a preschooler in the same position (from forty to sixty-five pounds) and a schooler in a belt positioning booster (from forty to one hundred and twenty pounds).

I like that the maximum weight limit of the Magellan XP is honestly high, 120 pounds, so that you can keep your child in a booster longer.

What enables such precise age-accurate accommodation is the high adjustability of the seat. Namely, this is the only model on the market with adjustable torso side impact protection. You can choose between three torso positions, seven recline positions, positions.

What is more, your child will experience the utmost comfort with the soft-touch infant pillows and self-wicking seat cover.

This convertible car seat is effortless to install and adjust due to integrated belt lock-offs and one-click latch connectors. Plus, the innovative air protects, technology installed into the headrest absorbs the impact and provides additional protection and comfort to your child.

Finally, the car seat meets federal safety standards and is approved for use in an airplane with the internal harness.

  • Innovative design
  • Two cup holders
  • Multiple position recline
  • Highly adjustable
  • Perfectly safe
  • FAA-approved
  • Best car seat for toddler (two positions for toddlers)
  • Longer booster use
  • Hideaway harness
  • /

Evenflo EveryFit 4-in-1 Convertible Car Seat - Extended use

As we have already mentioned, Evenflo has already won the customer's trust with its hundred years' long presence on the market and high-quality products. That is why I have decided to include another excellent Evenflo all-in-one convertible car seat to our list - The Evenflo EveryFit 4-in-1 Convertible Car Seat.

This is the only car seat I found, besides the Graco model, that includes the no-back booster mode. Namely, it features four different modes: rear facing, forward facing, a high-back booster, and no-back booster. This is beneficial because it allows your child to remain in a booster longer, which is certainly safer than a safety belt.

When it comes to the weight limits, this tremendous convertible car seat accommodates kids from four to one hundred and twenty pounds, which is the widest span on the market.

As the other Evenflo model, every fit also has the SureSafe latch connector, four recline positions, and twelve headrest positions. In this way, you can adapt the car seat to achieve a perfect fit for your child in every stage.

What is more, the seat features advanced side impact protection proven to reduce crash forces up to 30% and has been rollover tested, and structural integrity tested.

The seat is made of upgraded mesh fabric that allows the air circulation for the convenience of use. It also incorporates a cup holder and removable snack tray, so your little one can have everything at hand.

Most importantly, the Evenflo EveryFit meets all the federal safety standards and can be used in an airplane with an internal harness. Despite all these advantages, the seat is very affordable, being the only seat you'll need for ten years of your child's growth.

  • Longer booster use
  • Adjustable
  • Easy to install
  • Convenient
  • Breathable
  • Crash-tested
  • Faa-approved
  • /

All-in-one Car Seats Buyer's Guide

Choosing the safest car seats can be genuinely stressful and exhausting for new parents. We all freak out when the time comes because we know that our child's safety depends on this.

What experience taught me is that once you do a little research on the best safety measures that a car seat should have, it is not that hard at all. Yet, I wish there was someone to help me when I was preparing for the big day.

For this reason, exactly, I have decided to do your homework and provide an on-point buyer's guide with the list of things you should pay attention to when choosing the best convertible car seats.

It consists of the crucial questions you should ask when making a selection with explanations on why that particular feature is important.

1. What Positions Can the Car Seat Be Used in?

The best all-in-one car seat accommodates your child for approximately ten years. Therefore make sure it can be used in a rear facing, forward facing, and booster position. 

If you can find a model enabling extended rear facing use, opt for it.

best all in one car seats 2020

2. Was the Seat Crash-tested?

Make sure your car seat has been crash-tested in a front, side, and rollover crash. The seats that passed these tests are the safest seats on the market.

3. Is Your Car Seat Adjustable?

Adjustability is of crucial importance when it comes to convertible car seats. If you want the same seat to accommodate an infant and a ten-year-old, you'll need to adjust the headrest, recline, and possibly torso protection.

4. Does Your Seat Have a Side Impact-protection?

Side impact protection is a must! It absorbs the energy in case of an accident and protects your little one's torso and head.

5. Does Your Seat Include a No-rethread Harness?

best all in one car seat and stroller

The old car seats used to have a rethread harness, which is an entirely non-efficient way to adapt your car seat.

Look for the convertible car seat with a no-rethread, easy-adjust harness to save yourself time and effort.

6. How Easy is the Seat to Install?

Installation is already a parent's worst nightmare, and if your seat does not have some handy features, you'll be in trouble.

Therefore, before you buy a specific all-in-one car seat, check how easy it is to install, whether it has the innovative LATCH-systems, and how complicated it is to convert the seat from one stage to another.

7. Can You Remove the Cup Holders?

Cup holders might seem like an irrelevant segment of the car seat. But in reality, if you're trying to fit three across, you should check if your convertible car seat has removable cup holders.

If not, it will be highly improbable to install more than two car seats properly.

best all in one car seat wirecutter

8. What is the Price You Should Pay?

When it comes to the car seats, the more expensive the better, namely, the high-quality materials they use for the seats are very expensive.

Hence, if you want the quality, you should pay for it. The average price for all-in-one seats is around $180.

Frequently Asked Questions

Are all-in-one car seats worth it?

Most certainly, YES! These car seats will save you a ton of money since instead of buying four different car seats over the course of ten years, you can buy one convertible car seat.

What is the difference between convertible and all in one car seats?

the best all in one car seat

Convertible car seats can include only rear facing and forward facing mode, or forward facing and booster mode.

All-in-one car seats, on the other hand, include all three/four modes needed for your child, a rear facing, forward facing, and booster mode.

What is the safest all-in-one car seat?

Chicco Fit4 4-in-1 Convertible Car Seat has been tested in the front, side, and rollover crashes; therefore, it provides the maximum safety to your child.

Final Thoughts

As you probably concluded by now, an all-in-one car seat is an honestly good investment. It does not break the bank and provides the appropriate car restraint for your child over the course of ten years, at least.

What is more, these seats are highly adjustable and therefore provide the ultimate comfort and perfect fit for your child at every stage of his/her growth.

Yet, not all the models are equally good, which is why you should choose the car seat carefully. My best all in one car seats recommendation is the reliable Chicco Fit4 4-in-1 Convertible Car Seat with three-in-one design, multi-layered construction, side-impact protection, and convenient LATCH-system.

Chicco Fit4 4-In-1 Convertible Car Seat - Stratosphere*
  • Designed to deliver premier child fit and comfort at each unique stage, Fit4 makes it easy to correctly secure your child from birth through big kid booster for ultimate comfort, convenience and peace...
  • 4-Stage FitKit System provides optimal fit and comfort through multi-staged construction and easy-to-remove layers, providing more room to grow through each unique stage
  • Easiest all-in-one car seat to install correctly, thanks to Chicco-exclusive installation features including ReclineSure leveling system, RideRight bubble levels, force-multiplying SuperCinch LATCH...
  • DuoGuard offers 2 layers of protection with a steel-reinforced frame and EPS energy-absorbing foam that surround the head and torso, while a best-in-class 10-position headrest accommodates maximum...

Kathy Warner

Kathy is a busy mother of two and a CPS technician for more than eight years. Her mission is to awaken parents to the importance of child passenger safety and show them the right practice. You can read more about her here

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