How to Choose a Baby Car Seat: 7 Factors That Matter Most

Key Takeaways

• Start rear-facing from day one. An infant car seat is a popular option because of its newborn fit and stroller connection.

• Check three fits: your baby's size, your car's back seat, and how easily you can install the seat correctly.

• Every seat sold in the US must meet FMVSS 213, so compare installation, fit, fabrics, and stroller compatibility.

• Move to the next seat when your baby reaches its height or weight limit, not at a set birthday.

Choosing a car seat before your baby arrives can feel overwhelming. You're sorting through different seat types, unfamiliar terms like FMVSS, and dozens of models, all with your due date approaching.

To choose the right baby car seat, focus on three things: whether it fits your baby, whether it fits your car, and how easily you can install it correctly every time.

This guide explains the different types of car seats, the factors to consider before buying, common mistakes to avoid, and a checklist to help you make your final decision.

What Are the Types of Baby Car Seats?

Newborns must ride rear-facing in a seat that meets their size and fit needs. Options include infant seats and certain convertible or all-in-one models specifically approved for newborn use.

Weight ranges are taken from the Consumer Reports car seat buying guide. The G5+ range is taken from its product page.

Infant Car Seat (Rear-Facing Only)

An infant car seat is designed specifically for newborns and young babies. It installs rear-facing and typically includes a removable carrier that clicks into a compatible base installed in your car. 

This design makes it easier to move your baby between the car and a compatible stroller without taking them out of the seat. It also lets you leave the base installed when you take the carrier with you.

Infant car seats have height and weight limits that vary by model. Many babies outgrow their seat by height before reaching the maximum weight. Check the manufacturer's instructions for the exact limits and any head-clearance requirements.

When comparing infant seats, check the carrier's weight, base compatibility, stroller compatibility, and how easily you can secure the harness.

You can also explore the Orbit Baby infant car seat collection to compare available options.

Convertible Car Seat

A convertible car seat starts in the rear-facing position and can later be installed forward-facing with a harness, once your child meets the seat's requirements. 

This lets you continue rear-facing after your baby outgrows an infant seat, provided the convertible model's rear-facing height and weight limits accommodate your child. Many models allow rear-facing use up to 40 or 50 lbs, although the exact limits vary.

The main advantage is that you can keep your child rear-facing for longer without buying another seat for this transition. Most of the best convertible car seats can also dock onto a compatible stroller, allowing you to move your child between the car and stroller without removing them from the seat. 

Before buying, check the seat's rear-facing limits, dimensions, installation requirements, and stroller compatibility. Some models take up considerable space, which can affect front-seat legroom in smaller vehicles. 

All-in-One Car Seat

An all-in-one car seat is designed to accommodate several stages of your child's growth. Depending on the model, it can be used rear-facing, forward-facing with a harness, and later as a belt-positioning booster. This gives parents one seat to use across multiple stages instead of purchasing separate seats for each transition.

However, the seat's advertised weight range doesn't guarantee that it will fit every newborn well. Check the minimum weight and height requirements, harness adjustment range, and fit guidance for smaller babies. 

You'll also need to confirm when the manufacturer allows each change in seating position. Children should remain rear-facing until they reach the seat's rear-facing height or weight limit, whichever comes first.

All-in-one seats tend to be bulky and remain installed in the vehicle. They don't have a removable carrier that clicks onto a stroller, so they're less convenient if you frequently transfer your baby between the car and a stroller. Before buying, measure your back seat and check the seat's dimensions. 

Rotating Car Seat

A rotating car seat has a base that lets the seat turn toward the car door, making it easier to reach your baby when placing them in the seat or taking them out. This feature can reduce the amount of twisting and reaching required, particularly in vehicles with narrow rear doors or limited space beside the car seat.

Rotation is a feature that can be built into different types of car seats, including infant and convertible models. The seat's permitted positions depend on its design and manufacturer instructions. Before driving, return the seat to an approved travel position and check that it locks securely. Never assume that a seat is ready for travel simply because it has stopped rotating.

Orbit Baby's G5+ Infant Car Seat uses the SmartHub® base to provide 360° rotation. It accommodates babies weighing 4 to 30 lbs and measuring 17 to 32 inches tall. When comparing rotating models, check the seat's size, rotation mechanism, installation requirements, rear-facing limits, and whether it has a attachment for a rotating car seat with stroller.

Infant Car Seat vs Convertible Car Seat: Which Should You Start With?

For most first-time parents, an infant car seat is a practical starting point. It is designed to fit newborns, has a removable seat that clicks onto a compatible base and stroller, and makes it easier to move your baby between the car and stroller. You can switch to a convertible seat when your baby outgrows the infant seat.

Start with an infant seat if:

• You want to transfer your baby from the car to a compatible stroller without unbuckling them.

• You drive frequently and take your baby along on errands.

• You want a seat designed specifically for newborns, including smaller babies who meet the model's minimum size requirements.

• You plan to use a travel system with a compatible stroller.

Start with a convertible seat if:

• You drive with your baby occasionally and don't need a removable seat.

• You rarely transfer your baby between the car and a stroller.

• Your vehicle has enough room for a larger seat to remain installed rear-facing.

• You want a seat that can accommodate your child through rear-facing and forward-facing stages, within the manufacturer's limits.

Learn more about when to switch car seats.

7 Factors to Consider When Choosing a Baby Car Seat

Choosing a baby car seat involves more than comparing prices and features. Consider your baby's size, your vehicle's dimensions, installation, safety standards, stroller compatibility, fabric care, and everyday handling before making your decision.

1. Your Baby's Weight and Height

Choose a car seat that accommodates your child's current height and weight and allows room for growth. Each seat has specific limits and requirements for rear-facing, forward-facing, and booster use.

• Weight and height limits: Check both measurements in the manufacturer's specifications.

• Harness adjustment: Ensure the harness accommodates your child's size and can be adjusted as they grow.

• Seating stages: Follow the manufacturer's requirements before moving your child to the next stage.

For newborns, check minimum size requirements and whether the seat includes an approved insert. This will help you know when your baby is too big for an infant car seat. 

2. Fit to Your Car

A car seat must fit your vehicle and install correctly in an approved seating position. Check your vehicle owner's manual and the car seat manufacturer's instructions before buying.

Consider the seat's width and depth, the location of your vehicle's lower anchors and seat belts, and the space available for front-seat passengers. 

If you need to install multiple car seats, check whether they fit alongside each other without interfering with installation. Vehicle compatibility matters especially in compact cars, where a large seat can reduce front-seat legroom. 

If you drive a Tesla Model 3, read our guide to the best car seats for Tesla Model 3.

3. Ease of Installation

Look for a car seat you can install correctly and consistently. Depending on the model, the seat installs directly in the vehicle or attaches to a compatible base secured with the vehicle’s seat belt or lower anchors. Follow both the car seat and base manuals, observe lower-anchor weight limits, and follow the manufacturers' instructions for top tether use in forward-facing installations.

Orbit Baby’s G5+ base installs in under 60 seconds when you turn the StrongArm® tensioning knob, and it is LATCH compatible. The G5+ also supports installation without its base. Follow its vehicle belt-routing instructions when traveling by car and its separate lap-belt instructions when installing it on an aircraft.

One customer, Dayna C., praises the car seat's easy installation and everyday convenience: 

“Best car seat hands down! The easiest base installation and no hassle to get car seat in and out of car. Have been using Orbit Baby for every one of my kids. From infant car seats to toddler seats and strollers love every single one of them!”

4. Safety Standards and Protective Features

In the United States, car seats must meet Federal Motor Vehicle Safety Standard 213 (FMVSS 213). When comparing models, review the manufacturer's specifications for harness design, side-impact protection, and material testing.

A properly adjusted 5-point harness secures a child at the shoulders, hips, and between the legs. Some seats also include energy-absorbing materials in the shell. 

The Orbit Baby G5+ Infant Car Seat is tested to FMVSS 213 and FMVSS 302, which covers flammability. It features a side-impact protection shell lined with Expanded Polypropylene (EPP) foam and a SmartHub® base made from aerospace-grade aluminum. 

Check each manufacturer's documentation to understand the features included with a specific model.

5. Stroller Compatibility

Stroller compatibility matters if you want to move your baby between the car and stroller without removing them from an infant car seat. Some infant seats attach directly to compatible strollers, while others require an adapter. Convertible and all-in-one seats generally remain installed in the vehicle.

Before buying, confirm that the car seat and stroller are approved to work together. Check the attachment method and consider how easily you can connect and detach the seat.

6. Fabrics and Cleaning

Car seat covers can collect spills, crumbs, and everyday messes. Check the manufacturer's cleaning instructions before buying, as care requirements vary by model and component.

Look for removable covers that are easy to clean, and confirm whether they are machine washable or require hand washing. If fabric certifications matter to you, check whether the manufacturer lists standards such as OEKO-TEX® Standard 100. 

Also, find out whether approved replacement covers are available. Always follow the manufacturer's instructions and avoid unapproved inserts, padding, or covers that could affect the seat's fit or performance. 

For practical care advice, read our guide to how to clean car seats.

7. Daily Use and Carry Weight

Think about how the car seat will fit into your daily routine. Removable infant seats need lifting and transferring, whereas convertible and all-in-one seats typically stay installed. Rotating models can help you reach your child when buckling them in, depending on the design.

Check the seat's weight if you expect to carry it, how easily the harness adjusts, and whether the controls are straightforward for other caregivers. If you choose a rotating seat, confirm that your vehicle has enough room for its rotation mechanism to work as intended. If grandparents or other caregivers will drive your child, make sure they can install and operate the seat confidently. 

Common Mistakes to Avoid When Buying a Baby Car Seat

Buying a car seat without checking its fit, history, or installation requirements can lead to unnecessary expenses and problems when you're ready to use it. Avoid these four mistakes to make a more informed choice.

1. Assuming a Higher Price Means Better Protection

Choosing a car seat based on price alone can lead you to spend more on features your family doesn't need. In the United States, all car seats sold for use on public roads must meet applicable federal safety standards.

Higher-priced models may offer features such as easier installation, adjustable components, premium fabrics, or rotating designs, but the price alone doesn't establish how well a seat will suit your needs. Compare the seat's specifications, fit for your child and vehicle, and ease of installation before deciding whether the extra features justify the cost.

2. Buying a Second-Hand Car Seat Without Checking Its History

Buying a used car seat without knowing its full history means you could miss important information about its condition, age, or previous use. A seat might have hidden damage from a crash, missing parts, or a recall that affects its use.

Before accepting a second-hand seat, confirm that it hasn't been involved in a crash that requires replacement under the manufacturer's guidance, check its expiration date, and inspect its labels, parts, and manual. 

If you buy a new seat, complete your car seat registration to receive applicable safety notices and recall information.

3. Buying a Car Seat Before Checking Whether It Fits Your Vehicle

Ordering a car seat without checking your vehicle's dimensions and installation requirements can leave you with a model that's difficult or impossible to install correctly in your preferred seating position. Available space, seat-belt placement, lower-anchor locations, and the angle of your vehicle's seats can all affect compatibility.

Before buying, consult your vehicle owner's manual and the car seat manufacturer's instructions. Measure the available space and confirm the approved installation methods. Check the retailer's return policy, too, in case the seat doesn't fit. 

4. Waiting Until the Last Few Weeks to Buy a Car Seat

Leaving your car seat purchase until shortly before your due date can create unnecessary pressure. Your baby could arrive earlier than expected, leaving you with little time to compare models, check vehicle compatibility, or learn how to install the seat correctly.

Start researching during pregnancy and aim to have the seat ready well before your due date. Once it arrives, read the manual, install it according to the instructions, and check that the harness and other adjustments are appropriate for your newborn. 

Baby Car Seat Pre-Purchase Checklist

Use this checklist to compare car seat options and narrow your shortlist before buying.

1. Check your child's current or expected size against the seat's minimum and maximum weight and height limits.

2. Measure your vehicle's back seat and confirm the approved seating positions for car seat installation.

3. Locate your vehicle's lower anchors and top tether, and check which installation methods the seat supports.

4. Confirm that the car seat works with your preferred stroller and whether you need an adapter.

5. Consider who will install and use the seat, whether it will move between vehicles, and if you need an additional compatible base.

6. Review fabric certifications, cover-removal instructions, and washing requirements.

7. Check the return policy, home trial period, warranty coverage, and car seat registration requirements.

When Will Your Baby Need the Next Car Seat?

Your baby will need the next car seat when they reach the current seat's height or weight limit or no longer meet its fit requirements, rather than at a specific age. Always check the manufacturer's instructions before transitioning.

The usual car seat progression is:

• Infant car seat: Rear-facing only, until your baby outgrows the seat's limits.

• Convertible car seat: Rear-facing initially, then forward-facing once your child reaches the seat's rear-facing limits.

• Forward-facing car seat: Uses a harness until your child outgrows the seat's height or weight limits.

• Booster seat: Positions the vehicle's seat belt correctly once your child meets the booster seat's requirements.

Choose the Car Seat That Fits Your Baby, Your Car, and Your Day

The right car seat should fit your baby's size, your vehicle, and your daily routine. Shortlist two or three options, check their height and weight limits, measure your back seat, and review the return policy before buying.

Looking for a seat that installs in under 60 seconds, rotates toward the car door, and connects to compatible Orbit Baby strollers? Try out the G5+ Infant Car Seat and pair it with one of our stroller travel systems. The G5+ Infant Car Seat is priced at $550 and includes a 2-year limited warranty and a 60-day at-home trial. 

Explore the G5+ Infant Car Seat →

FAQs

When Should You Buy a Baby Car Seat?

Buy it early in the third trimester. That leaves time to test the fit, exchange it if needed, and install it before your due date.

Do Baby Car Seats Expire?

Yes. Each seat lists an expiration date on its label or a useful life in its manual, so replace the seat once it passes.

Where Is the Best Place to Put a Baby Car Seat in the Car?

In the back seat, rear-facing. The center sits farthest from a side impact, so use it when your car allows a tight install there.

How Long Can a Baby Stay in a Car Seat?

Many pediatric experts suggest a break at least every 2 hours.