Best Britax Convertible Car Seats

Updated September 2020
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom Line
Pros
Cons
Best of the Best
Britax Boulevard ClickTight Cool Flow Convertible Car Seat
Britax
Boulevard ClickTight Cool Flow Convertible Car Seat
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Bottom Line

This seat has a little more padding than other convertible seat models and includes a click-tight feature.

Pros

A product that is really durable. You can use this car seat from the time your child comes home from the hospital until they are ready for a seat-belt booster. Click-tight feature clicks when you have pulled the straps tight enough. Weighs about 30 pounds and rated to hold a child up to about 65 pounds. 7 positions available. Holds up well through multiple children.

Cons

This car seat is more expensive than the other Britax seats.

Best Bang for the Buck
Britax Essentials Allegiance Convertible Car Seat
Britax
Essentials Allegiance Convertible Car Seat
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Bottom Line

All the strengths of the Britax brand at a lower price.

Pros

Adjustment system for straps does not require re-threading. Narrower than other Britax models. Rated for children from 5 to 65 pounds. Heavy duty build. Steel frame. Several recline positions.

Cons

The instructions can be difficult to understand on this model.

Britax Marathon ClickTight Convertible Car Seat
Britax
Marathon ClickTight Convertible Car Seat
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Bottom Line

This seat is a little roomier than the other versions of Britax convertible seats.

Pros

Lots of adjustment points. 14 height adjustment points for tall children. No guesswork on the tightness of your child's straps with the click-tight system. No re-threading needed to adjust straps. Easy to adjust and install.

Cons

The click-tight system can be a little tricky to figure out.

Britax Roundabout G4.1 Convertible Car Seat
Britax
Roundabout G4.1 Convertible Car Seat
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Bottom Line

Same good quality as other Britax with fewer bells and whistles.

Pros

5-point harness is sturdy and easy to use. Easy to tighten and loosen straps. Buttons make it simple to tighten and release your child from this seat. Steel frame and safe cell impact safety build. Cover is easy to remove and clean.

Cons

The straps on this Britax have to be manually threaded to adjust height.

Britax Advocate ClickTight Anti-Rebound Bar Convertible Car Seat
Britax
Advocate ClickTight Anti-Rebound Bar Convertible Car Seat
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Bottom Line

This model includes a rebound bar designed to make the seat more stable in a rear facing position.

Pros

Steel frame. Heavy side impact protection. 7 recline positions. Very sturdy. Very safe. Includes the click-tight system for helping make sure the straps are tight enough.

Cons

The install on this seat can be a bit more challenging than other Britax models.

Why trust BestReviews?
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
How we decided

We purchase every product we review with our own funds — we never accept anything from product manufacturers.

7 Models Considered
5 Hours Researched
1 Experts Interviewed
108 Consumers Consulted
Zero products received from manufacturers.

We purchase every product we review with our own funds — we never accept anything from product manufacturers.

Convertible car seats are a great way to get the most for your money when buying a car seat, and Britax offers several quality models. Convertible car seats in general are able to be used both rear-facing for infants and forward-facing for toddler and older kids. Britax’s convertible models generally have weight limits of up to 40 pounds for rear facing and 55-65 pounds for front facing. Britax convertible seats are made of quality materials and usually feature several recline options to get the best fit for your child. Several models include a click-tight feature where the safety harness clicks when it is tight enough for your child. Straps can also usually be adjusted without the need to completely re-thread them.

Other Products We Considered
The BestReviews editorial team researches hundreds of products based on consumer reviews, brand quality, and value. We then choose a shorter list for in-depth research and testing before finalizing our top picks. These are the products we considered that ultimately didn't make our top 5.
BRITAX
One4Life ClickTight All-in-One Car Seat
BRITAX
Highpoint Belt-Positioning Booster Seat
BRITAX
USA Grow with You ClickTight Harness Car Seat
BRITAX
Allegiance 3 Stage Convertible Car Seat
BRITAX
Emblem 3 Stage Convertible Car Seat
The team that worked on this review
  • Alvina
    Alvina
    Photographer
  • Amos
    Amos
    Director of Photography
  • Branson
    Branson
    Videographer
  • Ciera
    Ciera
    Digital Content Producer
  • Melinda
    Melinda
    Web Producer
  • Vukan
    Vukan
    Post Production Editor
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Britax

Boulevard ClickTight Cool Flow Convertible Car Seat

Britax

Boulevard ClickTight Cool Flow Convertible Car Seat

This seat has a little more padding than other convertible seat models and includes a click-tight feature.
$267
×

Britax

Marathon ClickTight Convertible Car Seat

Britax

Marathon ClickTight Convertible Car Seat

This seat is a little roomier than the other versions of Britax convertible seats.
$239
×

Britax

Roundabout G4.1 Convertible Car Seat

Britax

Roundabout G4.1 Convertible Car Seat

Same good quality as other Britax with fewer bells and whistles.
$179
×

Britax

Advocate ClickTight Anti-Rebound Bar Convertible Car Seat

Britax

Advocate ClickTight Anti-Rebound Bar Convertible Car Seat

This model includes a rebound bar designed to make the seat more stable in a rear facing position.
$307
×

Britax

Essentials Allegiance Convertible Car Seat

Britax

Essentials Allegiance Convertible Car Seat

All the strengths of the Britax brand at a lower price.
$352

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