Best Diono Convertible Child Safety Car Seats in 2026

4-in-1 car seat gives you 10 years of use: seamlessly transforms from rear-facing harness car seat (4-40 pounds), to forward-facing harness car seat (22-65 pounds), to highback belt-positioning booster (40-100 pounds), to backless belt-positioning booster (40-120 pounds)

Graco ProtectPlus Engineered helps to protect your little one in frontal, side, rear and rollover crashes.

Simply Safe Adjust Harness System adjusts the height of your harness and headrest to 10 positions in one motion to ensure that your child is always properly secured

3-in-1 car seat grows with your child from rear-facing harness (5-40 pounds) to forward-facing harness (22-65 pounds) to highback booster (40-100 pounds)

Slim design with dual integrated cup holders that rotate away, making the seat 10% slimmer to save valuable back seat space

Graco ProtectPlus Engineered: A combination of the most rigorous crash tests that helps to protect your little one in frontal, side, rear and rollover crashes

3-in-1 harness booster helps protect your child, from toddler to youth

Grows with your child from forward-facing harness (22-65 pounds) to highback booster (40-100 pounds) to backless booster (40-100 pounds) to continue to meet industry standards, we have increased the weight minimum from 30 to 40 pounds

No-rethread simply safe adjust harness system allows the headrest and harness to adjust together in one motion.Do not use bleach

4 seats in 1: 4-in-1 seat gives you 10 years of use--it seamlessly transforms from rear-facing harness (5-40 lb), to forward-facing harness (22-65 lb), to highback booster (40-100 lb), to backless booster (40-110 lb).

Simply Safe Adjust Harness System: Adjust the height of your harness and headrest to 10 positions in one motion to ensure that your child is always properly secured.

10-position Headrest: One-hand, 10-position adjustable headrest is easy to use and grows to properly fit your growing child.

Built to Grow: The 3 in 1 Car Seat Built to Grow for Extended Use Through 3 Stages: Rear FACing 5 40 Pounds, Forward FACing 22 to 65 Pounds, and Belt Positioning Booster 40 to 100 Pounds

Side impACt protection: the grow and go’s side impACt protection helps keep your child safe. Carton dimensions 24.25 inches x 19.25 inches x 24.5 inches, assembled product dimensions 24.00 inches x 19.00 inches x 23.75 inches

Easy in, easy out: harness holders keep the harness in an open position so it’s easy to get your child in and out of the seat. Rear fACing height is 19 to 40 inches. Forward fACing height is 29 to 52 inches

This 2-In-1 combination booster car seat fitting children from 22-110 pounds. converts from a 5-point harnessed to belt-positioning car seat allowing for extended use for your child

Upfront Harness Adjust: Central, front access to harness adjuster provides an easy way to adjust child's harness for an accurate, snug fit

This lightweight combination booster car seat comes equipped for latch systems allowing for easy installation and transfer between multiple vehicles. Do not use abrasive cleaners or solvents.

3-in-1 car seat grows with your child from rear-facing harness (5-40 lb) to forward-facing harness (22-65 lb) to highback booster (40-100 lb)

Graco ProtectPlus Engineered: a combination of the most rigorous crash tests that helps to protect your little one in frontal, side, rear & rollover crashes

No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion

BUILT TO GROW — Use as a rear-facing (5-40 lbs.) or forward-facing (22-65 lbs.) car seat with 9-position ReclineSureTM leveling system, easy-adjust headrest and padded no-rethread 5-point harness to accommodate infant, toddler and beyond.

EASY TO INSTALL — Designed for secure install with remarkably simple leveling and tightening. A SuperCinch force-multiplying tightener and LockSure belt-locking system make it easy to achieve a tight fit with LATCH or with the vehicle seat belt.

ADDED FEATURES — Includes dishwasher-safe, space-saving CupFolder, soft, zip-off, machine-washable fabrics for comfort and convenience and removable newborn positioner for use from day one.

Designed to help protect your rear facing child from 5 40 pounds and your forward facing child from 22 65 pounds

Simply Safe Adjust Harness System adjusts the harness and headrest height together with one easy motion no re threading required

Graco ProtectPlus Engineered: a combination of the most rigorous crash tests that helps to protect your child in frontal, side, rear & rollover crashes; additional testing based on the New Car Assessment Program and for extreme car interior temperatures

10 Years of Use: One4Life convertible to booster car seat grows with your child from 5 – 120 lbs and up to 63” tall

Install Confidently: With ClickTight Installation, you’ll know it’s right in 3 easy steps: Open, thread & buckle, click it closed.

One4Life: Converts from a rear-facing infant car seat, to a forward-facing 5-point harness, to a high-back belt-positioning booster

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 of mind as your baby grows to age ten

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 tightener and LockSure belt-tightening system

PROTECT WITH EXTENDED TIME REAR-FACING: Allows you to keep your child rear-facing for longer as recommended by child safety experts — all the way up to 50 lb.

GET IN AND OUT EFFORTLESSLY: 360° rotation makes it a breeze to get your child in and out of the car with just one hand — an award-winning innovation that keeps on giving

GROW UP WITH IT: Grows with your child for 10 years with 3 modes that adapt to every stage — rear-facing (4 to 50 lb), forward-facing (22 to 65 lb) and booster (40 to 120 lb)

3-in-1 car seat helps to protect your child from rear-facing harness (5 - 40 pounds), to forward-facing harness (22 - 65 pounds), to highback booster (40-100 pounds)

Graco ProtectPlus Engineered to help protect your little one in frontal, side, rear, and rollover crashes.Do not use bleach.Do not use soap, detergents or lubricants

No-Rethread Harness: Simply safe adjust harness system adjusts the headrest and harness in one motion, to ensure proper fit

Car seat: Rear facing 4 to 30 pounds and up to 32 inches; Stroller - up to 50 pounds

Air protect superior side impact protection

Adjustable, stay in car base with rebound protection

REAR-FACING FOR LONGER - Designed and engineered to keep your child rear facing even longer up to 50 lb / 22.7 kg, approx. 4 years old

10 YEARS ONE CAR SEAT - With 4 ways to travel from birth to booster, the Radian 3R adapts as your child grows to offer a custom fit from birth up to 120 lb / 54 kg

STEEL CORE - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect

3-in-1 car seat grows with your child from rear-facing harness (5-40 lb) to forward-facing harness (22-65 lb) to highback booster (40-100 lb)

Graco ProtectPlus Engineered: a combination of the most rigorous crash tests that help to protect your child in frontal, side, rear and rollover crashes

No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion

3-in-1 CAR SEAT: Rear-facing with harness: 5-40 lb; forward-facing with harness: 22-65 lb; and forward-facing booster: 40-100 lb

HAPPY PLANET COLLECTION: Fabrics made with recycled materials as part of our Do More promise to Recycle, Reimagine, and Give Back

SLIM, SPACE-SAVING DESIGN: It's a back seat space savior

3-in-1 car seat grows with your child from rear-facing harness (4-50 lb) to forward-facing harness (22-65 lb) to highback booster (40-100 lb)

Anti-Rebound Bar provides an additional layer of rear-facing safety by limiting rotation of the seat and your child in the event of an impact

Extend2Fit 4-position adjustable extension panel provides up to 5" additional legroom, allowing your child to safely ride rear-facing longer

FOR ALL THE STAGES – From rear-facing harness (5-40 lbs.) to forward-facing harness (25-65 lbs.) to booster (40-100 lbs.), one car seat fits your child, vehicle and life. Includes a removable infant head and body support insert for newborns.

ROOM TO GROW – This convertible car seat boasts extra legroom and the widest range of headrest height adjustment. DuoGuard offers two layers of protection with a steel-reinforced frame and EPS energy-absorbing foam to surround head and torso.

NO ADDED CHEMICALS – ClearTex features no added chemicals and is GREENGUARD Gold Certified for low chemical emissions, contributing to healthier air quality around baby.

2-in-1 Convertible Car Seat: Easily transitions from rear-facing mode to forward-facing mode as your child grows from baby to toddler

ClickTight Installation: No stressing or struggling! Unobstructed seat belt paths clear the way for confident installation, and the automatic tensioner takes care of the tightening

Washer & Dryer Friendly: No more hand washing or waiting for the cover to air-dry. Just quick and easy cleanup, so you can keep moving

3 in 1 seating system: Rear facing, from 4-40 pounds; Forward facing to 65 pounds; And up to 100 pounds in booster mode

Side impact protection with cell protects your child's head where it's needed most in a side impact crash

In and out harness holders keep straps out of the way when buckling

Integrated adjustable canopy for UV protection: Integrated height and angle Adjustable canopy for in-car UV protection. Flip-out side visors provide additional shade protection for either side of the car seat.

4-In-1 seating system: Built for extended use including 1) rear facing infant mode from 4 to 18lbs 2) rear facing toddler mode from 18 to 40lbs 3) forward facing with harness Mode from 22 to 65 lbs 4) belt positioning booster mode from 40 to 100lbs

Comfort & convenience for kiddos: Child can quickly adjust the canopy when car is in motion and sun is coming from multiple directions. The coverme's exclusive comfort cabin offers extra padding to keep child comfortable on long rides.

The Evenflo Every fit 4-in-1 car seat has been engineered for maximum comfort, safety, and longevity. It accommodates your child by adjusting to multiple positions, allowing kids to ride rear-facing beyond 2 years of age-without extending the seat.

Safety is a priority: The every fit meets or exceeds all applicable federal safety standards and Evenflo Side Impact standard, with advanced Side Impact protection that reduces crash forces up to 30%. and, Installation is easy

Comfort: Innovative air flow Mesh fabrics are designed to keep your child cool. Angles your child comfortably to minimize head slump with 3 rear-facing recline positions and 1 forward-facing recline position.Do not use abrasive cleaners or solvents

Side Impact Tested, Meets or Exceeds All Applicable Federal Safety Standards and Evenflo's Side Impact Test Standard

Designed and Tested for Structural Integrity at Energy Levels Approximately 2x the Federal Crash Test Standard. Rear Facing Fit Tip is Top of Child Head is at Least 1 Inch Below the Top of the Child Restraint Seat Back

Multiple Shoulder Harness Positions for Better Fit and Longer Use. Age at Least Two Years of Age

Convertible car seat grows with your child from rear-facing harness (5-40 lb) to forward-facing harness (22-65 lb)

Slim car seat design saves space in your back seat

Compact and lightweight to easily transfer from car to car

Rotate from rear-facing mode with one hand to easily get baby in and out of the seat; listen for it to "click" back into position for a safe and comfy ride

3 modes of use: Rear-facing harness 4-40 lb, forward-facing harness 22-65 lb, highback booster 40-100 lb

SnugLock technology installs in less than one minute using vehicle seat belt or LATCH

With 2 modes of use, this extra comfortable LATCH equipped Cosco car seat accommodates infants from 5 pounds up to toddlers weighing 40 pounds in rear facing mode and kids up to 65 pounds in forward facing mode. Its compact design also makes it easier to manage through airport security checks

The 5 point harness adjusts easily from the front of the seat and features 5 heights and 3 buckle locations

Built in side impact protection keeps your little 1 extra secure; Designed to be just the right size, the seat takes up less space while rear facing so parents can have more leg room

3 Modes in 1 Seat: Accommodates children from 5 - 110 lbs - Rear Facing, Forward-Facing Harness and Belt-Positioning Booster

5-point harness tested to a 65 lb weight limit: Allows longer harness use until child is ready for belt-positioning booster

No Rethread Harness: easy-to-slide harness straps enable proper fit during each ride and as child grows- without uninstalling the car seat

With two modes of use, this LATCH-equipped Cosco car seat accommodates infants from 5 pounds up to toddlers weighing 40 pounds in rear-facing mode and kids up to 40 pounds in forward-facing mode.

The five-point harness adjusts easily from the front of the seat and features six heights and three buckle locations.

In both the rear-facing and forward-facing modes, built-in side-impact protection keeps your little one extra secure.

10-Year Car Seat: The seamless transitions between modes offer up to 10 years of use from your Eternis S. An in-seat recline helps provide correct ergonomic positioning and extra legroom that lets your child ride rear-facing for longer.

SensorSafe: The chest clip SensorSafe technology automatically syncs to the phone app to provide alerts if unsafe situations arise, including your child becoming unbuckled, the back seat being too warm or cold, or if the child is seated too long.

All-In-One Car Seat: The CYBEX Eternis S is the only seat your child will need from birth and beyond. Featuring rear-facing, front-facing, and belt-positioning booster modes, the Eternis S is designed for use from birth up to 120 lbs.