can a 4 year old sit in a booster seat

Can A 4-Year-Old Sit In A Booster Seat? – (Explained in Detail)

As parents, we often wonder when our children can transition from one stage to the next. One question that comes up is whether a 4-year-old can sit in a booster seat. 

Booster seats are designed to elevate children and position seat belts correctly. However, age alone may not be the only factor to consider. 

Let’s explore when and if a 4-year-old can sit in a booster seat or not. What are some booster seat safety tips finally, I will list the best booster seats available for a 4-year-old at the end of this post.

What are booster seats?

Booster seats are the next level of the car seat which are designed in a specialized way to promote a child to a height where he can use the adult seat belt of the car. 

These seats are usually used by children who have outgrown a car seat (forward-facing) but are not yet tall enough to safely accommodate into an adult seat belt in the car. 

Booster seats take the child to the proper height and positioning where he can wear the adult seat belt built-in in the car. 

It minimizes the risk of injury in case of a car crash. 

Can a 4-year-old sit in a booster seat?

The answer to whether a 4-year-old can sit in a booster seat depends on the child’s height, weight, and developmental stage. While age is often used as a guideline, it is not the only factor to consider. 

Generally, a child should weigh between 40-100 pounds, and be between 40-57 inches tall to use a booster seat. 

However, it is essential to follow the manufacturer’s guidelines and ensure that the seat belt fits properly over the child’s lap and shoulder before transitioning to a booster seat.

Moreover, booster seats are designed for the kids who are no longer fitting in the forward-facing car seat that has 5 point harness, so if your 4-year-old is no longer fitting in it and you can see that he has outgrown the car seat in terms of height and weight; you can consider getting a booster seat. 

Later in this article, we will discuss in detail the factors to consider while getting a booster seat for a 4-year-old.

I would suggest you check the laws and regulations of the state you are living in as every state or country has its own safety laws. 

1- Can a 4-year-old sit in a backless booster seat?

backless booster seats are the ones that only have a cushion that lifts the child to a perfect seating position where he can put on the adult seat belt easily. It is usually for vehicles that have headrests and high seats.

But as long as a 4-year-child is concerned, I suggest not getting a backless booster seat as he is still not at an appropriate age to use it.

2- Can a 4-year-old sit in a high-back booster?

High-back boosters have a backrest that provides full support to the child’s back, neck, and head. It is better to get a high back booster for a 4-year-old child as he would be safer and more secure in terms of safety and comfort.

can a 4-year-old sit in a booster seat in the front?

No, a 4-year-old should not sit in a booster seat in the front. It is not safe. You should install the booster seat in the back, a little bit away from the door to keep the child safe.

You should also check the laws of your state.

Can A 4-Year-Old Sit In A Booster Seat?

When to switch to a booster seat?

Switching to a booster seat involves various factors to consider, some of which are as follows.

1- Age of the child:

Mostly these gears are introduced to a child depending on his age. Till the age of 2, the child must remain in the rear-facing car seat unless they outgrow it and are ready to be shifted to the forward-facing car seat.

Similarly, a booster chair is recommended for a child who outgrows from the forward-facing car seat. There could be a possibility that a 4 -year-old is physically ready for a booster chair, so many of the boosters chairs come with a mentioned age of 4+.

2- Weight and height of the child:

The second most considered fact on switching on the booster chair is to see if your child has crossed the limit of weight and height for their forward-facing car seat, then it’s time to shift to the booster seat. It usually happens from the age bracket of 4-7 years. 

Once you see that your child’s height and weight are perfect for the booster seat, replace it so that now he can use the vehicle seat belt for proper safety. The ideal height and weight for booster seats are 4 feet 9 inches and 40-80 pounds respectively.

3- Developmental fitness of the child:

Thirdly, the most important thing to keep in mind while switching to the booster seat is to know whether your child is developmentally fit and accepts to adopt the change or not. 

For that, you may observe that your child would be able to sit in the booster seat properly the entire time.

Also, check if he is comfortably sitting on the booster chair while resting his knees at the correct place and if the seat belt is fitting correctly across his shoulder and lap without choking his neck.

When can a child stop using a booster seat?

You might want to know when your child will stop using the booster seat so you can estimate the value of getting a new booster seat. 

There are different factors to consider when you think it is time to stop using the booster seat.

1- Age of the child:

The standard age bracket is 8-12 years until a child can use the booster seat. However, it also depends on your child’s physical development. 

As a parent, you should also consider your child’s comfort and needs rather than only relying on the age factor.

Usually, the children who start the booster chair early are the ones who get out of it early.

2- Weight and height of the child:

All the booster seats come with weight and height limits mentioned on the box. 

It is because the manufacturer wants to ensure that a child remains safe in any event of a crash so the users need to keep a check on their child’s height and weight and if it is crossing the mentioned limits then it is better to transition the child to use the vehicle seat belt.

3- Do a vehicle seat belt fit test:

Once you notice that your child is uncomfortable in the booster seat and his seat belt fit is not appropriate, then do a seat belt fit test without the booster seat.

Make your child sit in the vehicle and fasten the vehicle seat belt, if the lap belt is low across the upper thigh and the shoulder belt fits well across his shoulder and chest then Congratulations! it is time to remove the booster seat from the car. 

The main purpose of the booster seat is to ensure that the vehicle seat belt fits perfectly to the child and gives effective protection against any crash. So carefully watch your child when you think it is time to stop using a booster seat.

Booster seat safety tips: 

Following are some important safety instructions to use when you are shifting your 4-year-old to a booster seat.

1- Select the right type.

For a 4-year-old child, a high-back booster seat is recommended as it provides extra support to the neck and head. An average-height booster seat is also good. Avoid backless booster seats for a child at age 4.  

2- Select an appropriate size.

Boosters seats come in many sizes, types, and height and weight limits, make sure you pick the best for your child that matches his perimeters. Thoroughly follow the instructions and guidelines by the manufacturer about the weight and height required to transition the child from a forward-facing car seat to a booster seat.

3- Install it correctly.

Install the car seat with the help of the manufacturer’s instruction guidebook and the vehicle manual. Ensure that the vehicle belt is perfectly fitting the child when he sits on the booster seat.

4- Ensure correct positioning.

The booster seat should be placed in the back seat of the vehicle, preferably in the middle seat, as it is the safest spot. Avoid using a booster seat in the front seat with an active airbag, as it can be dangerous for children.

5- Ensure the proper fit of the vehicle’s seat belt.

After installation, ensure that the vehicle seat belt is perfectly crossing over your child’s body.

The lap belt should be fitting across the child’s upper thigh and the shoulder belt should be comfortably crossing the shoulder and the chest. If you notice any alignment, don’t consider moving the child from the forward-facing car seat or get a booster seat with a 5-point safety harness. 

6- Don’t uninstall it until the child is fully ready to leave it.

Despite the age, don’t uninstall the booster seat considering that your child has crossed the age limit for using it. Instead check his height, weight, and development readiness to see if he is all set to come out of the booster seat and ready to only use the vehicle seat belt.

7- Set an example.

As an adult, always wear your seat belt so that your child observes it when he grows up. Children are more likely to follow safety rules when they see adults practicing safe habits.

8- Keep a constant eye on the child using a front mirror.

Keep a constant check on your child while driving, whether he is wearing the seat belt or not. Verbally communicate not to take off the seat belt when the car is moving.

booster seat for 4 year old

What to look for while buying a booster seat?

When buying a booster seat, there are some important factors to consider to ensure the safety and comfort of your child. Here are some things to look for:

1- Safety:

When choosing a booster seat for your child, the main purpose of it should be the utmost safety. Whenever you make up your mind to transition your child to a booster seat, check the latest safety standards set by the country you are living in. 

2- Brand Reputation:

Before you invest in a booster seat, do some research on the brands you are considering. Read the customer’s reviews to get an idea of the quality, durability, and performance of the booster seat.

3- Size limit:

Before you jump to buy a booster seat, do a thorough inspection of your car first. Not all booster seats fit well in all types of cars. So first measure the dimension of your car’s seating and the booster seat you are interested in. Make sure it will fit properly and securely in your car.


Make sure you have installed the booster seat correctly into the vehicle. Although every booster seat comes with a complete installation guide if you feel doubtful for a second, I would recommend getting it installed by the manufacturer representative because safety comes first.

5- Comfort:

Involve your child in the decision-making process and consider their comfort preferences. Let them try out different booster seats and choose one that they find comfortable and easy to use. Look for booster seats with padded seats, adjustable headrests, and armrests for increased comfort during long car rides


Look for breathable and easy-to-clean fabric covers that are easy maintenance. Look for a fabric that does not catch heat from outside.

7-Type of booster seat:

Whether you are buying the booster seat for your 4-year-old or a child above this age. See what your child needs, if he needs proper support then go for a high-back booster seat but if your child is grown up and knows how to support his neck and back then a backless booster is a much better option.

8- Invest in the best:

Remember that “invest in the best”.  A booster seat is not a product where you will find the cheapest item, instead, look for the safest option. You may compromise on any other factor but never compromise on your child’s safety. 

There is a variety of booster seats that comes in different price range and brands. First, consider what budget you have for it, secondly, keep in mind that such gears provide safety to your child, so never compromise on the quality of it. Make sure the booster seat you are getting has all the necessary safety standards.

Does a 4-year-old need 5 point harness: 

Yes, 5 point harness is safer than a seat belt for a 4-year-old child.

Some booster seats come with a 5-point harness and are more suitable for a child who has recently transitioned from his forward-facing car seat that has a 5-point harness in it.

Also, the user must check their local laws about road safety and what type of gear is allowed for specific age groups. In some areas, the booster chair for children who have recently outgrown the forward-facing car seat must have a 5-point harness whereas in some areas a booster seat with a vehicle seat belt is accepted.

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Best booster seat for 4-year-olds:

Now, here is the list of some best booster seats available for 4-year-olds. No. 1 is what I recommend. 

1- Perfect Booster Seat for 4-Year-Old;  Best 5-point harnessed (and high-back) booster seat:

If you are looking for a great booster seat, look no further. Chicco booster seat is a perfect fit for 4-year-olds as it has all the features you might be looking to keep your child safe on the go. 



  • It has a high back (27” high), which is recommended. 
  • It has a 5-point safety harness. (that converts into a belt-positioning booster seat as the child grows. 
  • It has head and torso protection.
  • It has a 9-position headrest and a 4-position recline.
  • Its soo easy to install.
  • It has cup-holders
  • It is so comfortable.

If you haven’t bought a booster seat yet, I recommend getting it now, You won’t regret it. 

Its available on Amazon. Click here to purchase or check more information. 

2- Best slim booster seat for 4-year-old:

If you are looking for a slim booster seat for your 4-year-old, Diono Radian 3R, a 3-in-1 Convertible Car Seat is the best investment you could make. 

It is only 17” inches wide. Moreover it has a high back that makes it a great choice. 

This convertible seat is designed to cater to the needs of your child from birth to grown-up kids. That’s what it says “ 10 years, one car seat” which means this Diono radian 3R will convert along with your child’s age. Extremely suitable for 4-year-olds as it can go a long way. The slim fit design will fit easily in the vehicle without disturbing child safety and other passenger comforts.

3- Best backless booster seat for 4-year-old: 

Although I would not recommend a backless booster seat for your 4-year-old if you think your child can easily manage in one, then try considering the Chicco GoFit Backless Booster Car Seat as it promises to provide safety to kids from age 4 and above. 

This backless booster is lightweight and portable so that you can move it easily from one car to another. 

The contoured seat cushion and the padded armrest provide an extra boost to the child’s safety and comfort.

4- Best high-back booster seat:

 Evenflo GoTime LX High Back Booster Car Seat comes with two modes of forward-facing use and it has 7 height positions so that you can adjust it according to your child’s height as it grows. The overlapping head and body sides make this booster chair more supportive and comfortable for a car ride. The back of the booster is portable and can be removed when your child is ready for a backless booster. A great pick for your 4-year-old as it has conversion options that goes a long way.

5- Booster seat for 4-year-old boy: 

KidsEmbrace 2-in-1 Harness Booster Car Seat, Marvel Spider-Man would definitely attract your 4-year-old son, as most of them love spider man.

Your little man will feel like he is a superhero traveling to save the world. This forward-facing car seat cum booster comes with a 5-point harness which is totally suitable for 4-year-olds.

It can be converted to a booster later when you feel your child has grown up and can use the vehicle seat belt.

6- Booster seat for 4-year-old girls: 

Diono Radian 3R, 3-in-1 Convertible Car Seat, this rear-facing car seat to a booster is what you need for your 4-year-old girl, and guess what it comes in some pretty girly colors your princess would love to have. “10 years, one car seat “, Diano Radian 3R can be the best investment you could do for your child. The best part is this car seat is slim and sleek and it gets fits in the car perfectly without bothering the other passengers.


A good and age-appropriate car seat is very important for your child’s safety on the go. Your 4-year-old can start using a booster seat. You should consider a high-back booster seat with extra protection around head and torse. A 5-point-harness is a feature you should consider. 
I recommend Chicco Booster seat, as it has all the features you should look for when buying a booster seat for your 4-year-old.

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