How to Measuring Roof Box Sizes Like a Pro? Quick & Accurate

There are a few things to consider when measuring for a roof box. The first is the size of your vehicle. You’ll need to know the length, width, and height of your car in order to determine what size roof box will fit best.

The next thing to consider is the amount of gear you’ll be carrying. A larger box will obviously be able to hold more, but it’s also important to think about how easy it will be to access your gear. If you’re carrying skis, for example, you’ll want a box that opens from the side so you can easily get them in and out.

Finally, you’ll need to consider the weight of the roof box itself. The heavier the box, the more strain it will put on your vehicle’s roof rack system. With all these factors in mind, here are a few tips for measuring for a roof box:

Key Takeaways:

  • Measure the length, width, and height of your vehicle. This will give you a good starting point for finding a compatible roof box.
  • Think about how much gear you’ll be carrying and whether or not you need easy access to it. Skis, for example, require a different type of roof box than camping gear.
  • Consider the weight of the roof box itself when making your decision.
  • To measure the size of a roof box, you will need to take into account the length, width, and height of the box.
  • The length is measured from the longest point at the front of the box to the longest point at the back of the box.
  • The width is measured from one side of the box to the other at its widest point.
  • Finally, the height is measured from the bottom of the box to its highest point.

Are Roof Basket Better Than Roof Box?

How Do You Measure a Roof Box?

When you are ready to buy a roof box, the first thing you will need to do is measure your car’s roof. You will need to know the length and width of your car’s roof in order to choose the right size roof box. To measure your car’s roof, start by measuring from the front of the car to the back.

This is the length. Then, measure from one side of the car to the other. This is the width.

Once you have these measurements, you can start shopping for a roof box that will fit your car’s roof perfectly. It is important to make sure that you get a good fit when choosing a roof box. A poorly fitting roof box can damage your car’s paint job and cause wind noise when driving.

It can also be dangerous if it comes loose while you are driving. That is why it is so important to take accurate measurements before buying a roof box.

Can a Roof Box Be Too Big?

A roof box can be too big if it extends beyond the width of your car’s roof. It can also be too long, which will make it difficult to open your trunk or hatch. If you have a smaller car, you might want to consider a smaller roof box.

Does a Roof Box Fit into Any Bars?

No, not all roof boxes will fit into all types of bars. The size and shape of your roof box will determine which type of bar it is compatible with. In general, there are three types of bars: T-track, square bar, and aero/wing bar.

Each type of bar has its own unique mounting system, so you’ll need to make sure that your roof box is compatible with the type of bar you have before purchasing one.

How is Hatch Clearance Measured?

There are a few different ways that hatch clearance can be measured. The most common way is to measure from the top of the door opening to the top of the highest point on the roof. This measurement is typically taken with the door open and the vehicle on level ground.

Another way to measure hatch clearance is from the bottom of the door opening to the top of the highest point on the roof. This measurement is typically taken with the door closed and can be affected by things like suspension height and tire size. The last way to measure hatch clearance is from the ground to the top of the highest point on the roof.

This measurement is taken with the vehicle on level ground and can also be affected by things like suspension height and tire size.

Roof Box Size Guide

Yakima Skybox Size 4

When it comes to choosing a roof box for your car, size is everything. Not only do you need to make sure that the box is big enough to fit all of your gear, but you also need to ensure that it won’t be too large and unwieldy for your vehicle. To help you select the perfect-sized roof box for your needs, we’ve put together this handy guide.

To start, measure the length and width of your car’s roof. This will give you a good idea of how much space you have to work with when selecting a roof box. Keep in mind that most boxes are designed to fit onto roofs with a minimum width of 50cm.

Once you know the dimensions of your car’s roof, take a look at our range of roof boxes and find one that best suits your needs in terms of both size and capacity. If you’re unsure which model would be best suited for your car, feel free to contact us and we’ll be happy to offer some advice.

Thule Roof Box Size Guide

If you’re in the market for a roof box, one of the first things you’ll need to figure out is what size to get. After all, you don’t want to end up with a box that’s too small or too big for your needs. Luckily, Thule has put together a handy roof box size guide to help you make the right decision.

Here’s what you need to know: The first thing to consider is the length of your vehicle. Thule offers three different sizes of roof boxes – small, medium, and large – so you’ll need to make sure you get one that’s appropriate for your car.

Next, think about how much stuff you’ll actually be carrying in your roof box. If you’re only going to use it occasionally for light items like blankets and pillows, a small or medium-sized box should suffice. But if you plan on using it regularly for heavier items like camping gear or sports equipment, then you’ll need to go with a larger option.

Finally, take into account the shape of your vehicle when choosing a roof box size. For example, if you have a hatchback or SUV with limited space in the trunk, then a smaller square-shaped box might be best. On the other hand, if your car has plenty of room in the trunk and/or has an aerodynamic design (like many sedans), then a longer and narrower rectangular box would work well.

Keep these factors in mind and consult Thule’s roof box size guide before making your purchase; doing so will help ensure that you get exactly the right model for your needs!

Cargo Box Sizes And Prices

Cargo boxes come in all shapes and sizes, but there are a few general categories that most companies use to determine to price. The size of the cargo box is usually based on the length of the car’s roof, with smaller cars requiring smaller boxes and larger cars requiring larger boxes. The price of the cargo box is also determined by its capacity, with larger boxes costing more than smaller ones.

There are a few other factors that can affect the price of a cargo box, such as the type of material it’s made from and whether it comes with any special features. However, in general, size and capacity are the two main determining factors. If you’re shopping for a cargo box, be sure to keep these things in mind so you can get the best deal possible.

And remember, always measure your car’s roof before ordering to make sure you get the right size!

Thule Cargo Box

Thule Motion XT XLL

Thule is a Swedish company that designs and manufactures products for outdoor activities, including a wide variety of cargo boxes. These boxes attach to the roof of a vehicle and are used to store extra gear, making them ideal for road trips, camping trips, or any other time when you need to bring along more stuff than will fit in your car. There are many different types of Thule cargo boxes, each designed for specific needs.

For example, the Motion XT is their largest and most popular model, with enough space to hold up to 17 cubic feet of gear. If you don’t need quite that much space, the smaller Force XT has room for up to 14 cubic feet. Both models come with built-in handles and wheels for easy transport from your car to your destination.

If you’re looking for something even more lightweight and compact, the SpaceCase is Thule’s smallest cargo box at just 11 cubic feet. It’s perfect for carrying smaller items like suitcases or golf clubs. And if you need maximum security for your belongings, the SecureLock box features lock cylinders that can be locked shut with a key (sold separately).

No matter what type of Thule cargo box you choose, you can be sure it will make packing up for your next adventure a breeze!

Rei Cargo Box

Assuming you would like a blog post discussing the Rei Cargo Box: The Rei Cargo Box is a great way to add extra storage space to your car. It’s perfect for road trips or camping trips when you need to bring along more gear than will fit in your trunk.

The box is made of durable plastic and has a weather-resistant lid, so it will keep your belongings safe and dry no matter what the conditions are like outside. Plus, it’s easy to install – just strap it down in your trunk or backseat using the included straps, and you’re all set. If you’re looking for an easy and convenient way to add extra storage space to your car, the Rei Cargo Box is a great option.

It’s durable, weather-resistant, and easy to install, so it will protect your belongings and make packing up for your next adventure a breeze.

Cargo Box for Suv

Cargo Box for SUV

A cargo box is a great way to add extra storage space to your SUV. There are many different styles and sizes of cargo boxes available, so you can find one that fits your needs perfectly. Cargo boxes are typically made from durable materials like plastic or metal, and they often come with features like lids and locks to keep your belongings safe.

If you’re looking for a cargo box for your SUV, there are a few things to keep in mind. First, decide what size you need. Cargo boxes come in a variety of sizes, from small boxes that fit behind the seats to large ones that take up the entire trunk.

Second, consider what material you want your box to be made from. Plastic boxes are usually lighter and more affordable, while metal boxes tend to be more durable. Finally, think about any special features you might want, such as a lid or lock.

Once you’ve decided on the perfect cargo box for your SUV, it’s time to install it. Most cargo boxes simply bolt onto the roof rack of your vehicle, but some require more installation than others. Be sure to follow the instructions that come with your particular box carefully so that everything is installed properly and safely before heading out on your next road trip!

Narrow Roof Box

A roof box is a great way to increase the storage capacity of your vehicle, but it’s important to choose the right size for your needs. A narrow roof box is ideal for smaller vehicles or if you need to maximize space on your roof. Here are some things to consider when choosing a narrow roof box:

Capacity: How much stuff do you need to store? Make sure to check the capacity of the roof box before purchasing.

Dimensions: Measure the length and width of your vehicle’s roof so you know what size will fit. A narrow roof box will be shorter and narrower than a standard one.

Installation: Some roof boxes require special installation kits or brackets. If you’re not comfortable installing it yourself, make sure to get help from a professional.

Weight: The weight of the empty roof box will add to the overall weight of your car, so keep that in mind when deciding which one to buy.

Best Cargo Box

If you’re in the market for a cargo box, there are a few things you’ll want to keep in mind. First, consider the size of your vehicle. You’ll need to make sure the box you choose is big enough to hold all the gear you want to transport, but not so large that it won’t fit in your car.

Second, think about how you’ll be using the box. If you frequently go on long road trips or camping trips, you’ll want a model with plenty of storage space and easy access. On the other hand, if you just need extra space for occasional errands or short trips, a smaller box will suffice.

Finally, take into account your budget. Cargo boxes can range in price from around $100 to $500 or more, so it’s important to find one that fits your needs without breaking the bank. With these factors in mind, let’s take a look at some of the best cargo boxes on the market today.

One option worth considering is the Thule Motion XT XXL Roof Box. This massive box has a capacity of 21 cubic feet, making it ideal for storing everything from skis and snowboards to camping gear and luggage. It’s also designed for easy loading and unloading, with wide-opening doors that swing open up to 270 degrees.

And thanks to its aerodynamic shape, it won’t add too much wind noise or reduce fuel economy when driving. The only downside is its high price tag; at $949, it’s one of the most expensive cargo boxes on the market. For something more affordable, check out Yakima’s SkyBox Carbonite 21 Roof Box.

It also has 21 cubic feet of storage space and wide-opening doors for easy access, but its sleek carbon fiber construction makes it considerably lighter than the Thule box (just 46 pounds). That means it’s easier to install and remove from your roof rack—a definite plus if you plan on using it often. It also comes with an integrated lock system to keep your belongings safe while on the road.

Prices start at $649 for this model.


There are a few different ways that you can measure roof box sizes. The first way is to use a tape measure. You will want to measure the length, width, and height of the area where you will be placing the roof box.

Another way to measure roof box sizes is to use a ruler. You will want to measure the length and width of the area where you will be placing the roof box. The last way to measure roof box sizes is to use a measuring wheel.

You will want to roll the measuring wheel over the area where you will be placing the roof box.

Best Seller List of Roof Cargo Boxes:

Bestseller No. 1
JEGS Rooftop Cargo Carrier for Car Storage - Large Roof Rack Cargo Carrier - Heavy Duty Weatherproof...
  • Secure & protect your gear in this 18 cubic ft. HDPE plastic hard shell vehicle cargo carrier; high-capacity interior dimensions 57 L x 38 1/2 W x 17 3/4 H inches; aerodynamic design for fuel efficiency
  • Weatherproof storage for your luggage with a four corner locking system, front latch, and weather-tight seal for ultimate car rooftop protection and security
  • Easy & convenient loading and unloading from either side of the car make for smooth travel and hassle-free storage
  • No tools required, easy assembly and installation. All mounting hardware and simple instructions are included to get you safely on the road quickly
  • Made in USA, limited lifetime guarantee. The JEGS car top carrier’s high-quality construction and performance give you peace of mind
  • Holds 3 golf bags
Bestseller No. 2
SportRack Vista XL Rear Opening Cargo Box,Black
  • 18 cubic foot (510 L) internal cargo capacity
  • Made from durable UV-resistant ABS material
  • Rear opening for easy access away from traffic
  • Tool-free mounting hardware for easy installation and removal
  • Includes key and lock to secure contents in the box, and the box to your rack
  • Fits SportRack Rack Systems, square bars, round bars and most factory racks (check fit guide)
  • Dimensions (LxWxH): 63 x 38 x 19 in / 160 x 96.5 x 48 cm
  • Min-Max Crossbars Spacing: 23 5/8 - 29 3/4 in (60 - 75.5 cm)
  • Max Weight Capacity: 100 pounds (45 kg)
Bestseller No. 3
Auto Dynasty Heavy Duty Hard Shell Roof Top Mount Car Storage Travel Luggage Box Cargo Carrier with...
  • ▶️ This roof top storage box is universal fit for mounting to max 13 inches wide cross bar, please check the dimension before purchase.
  • ▶️ The package comes with [1] 53 inches length storage box, [2] security lock key, and [4] heavy duty tool free installation mounting brackets.
  • ▶️ It is constructed of rugged, impact-resistant ABS material to ensure a long lasting life in outdoor conditions. More, it can open from the side and stay open till you close it with the strong support arm.
  • ▶️ Opens on the passenger side to 14 inches wide to store bulky items from the side and stays open till you close it, and it is very easy to install without any tool required to assembly.
  • ▶️ Overall Dimensions: 53" L x 34" W x 15" H | Capacity: 11 Cubic Feet and up to 110 LBS
Bestseller No. 4
Thule 614 Pulse Rack, Medium, Black
  • Functional rooftop cargo box provides 14 cubic feet of additional packing space
  • Rugged and durable design keep contents protected
  • FastGrip quick-mount system assembles in minutes
  • Passenger-side opening for easy loading and unloading
  • Central Locking system provides maximum safety
  • Thule Comfort Key can only be removed when all locking points are securely closed
  • Fits 3-5 snowboards (max length: 155 cm)
  • External dimensions: 67 x 35 x 16 inches; Internal dimensions: 61 x 33 x 14 inches
  • Load capacity: 110 lbs; Product weight: 34 lbs
  • Height off crossbar: 16 inches. Fast and secure mounting
Bestseller No. 5
287 Reviews
TACTIK Rooftop Cargo Carrier Hard Shell, X-Large, Dark Slate - Rooftop Cargo Carrier for Top of...
  • UNLOAD FROM BOTH SIDES - the patent-pending dual side-opening design allows you conveniently load and unload your travel luggage and gear from both sides of the rooftop cargo carrier so you're out of the way of traffic while you unload
  • FUEL EFFICIENT DESIGN - the aerodynamic design of the roof rack cargo carrier reduces drag and wind resistance to minimize fuel economy disruption. The 18 cu ft carrier measures 57" x 38.5" x 17.75" and the 10 cu ft carrier is 46.5" x 30.5" x 17.75"
  • SECURE LOCKING SYSTEM - this car top carrier secures your luggage with a four-corner cam locking system to ensure that the lid won't blow open while you're on the road with a keyed theft-resistant lock for peace of mind at stops. Includes 2 keys
  • WATERPROOF & UV RESISTANT - proudly made in the USA, this waterproof rooftop cargo box is manufactured from durable, all weather high-density polyethylene material that includes a built-in UV stabilizer that resists cracking and fading
  • MOUNTS TO CROSS BARS - the car rooftop cargo carrier is a quick and easy no-tool installation and allows you to mount to your vehicle's cross-bars (not included). Pre-drilled mounting holes for cross-bar attachment are drilled 24" on center
Bestseller No. 6
TUFFIOM 11.65 cu.ft. Rooftop Cargo Box w/Keys, Hard Shell Dual-Side Opening Waterproof Roof Mount...
  • DUAL-SIDE OPENING FOR EASY ACCESS: Dual-side opening design allows you to open it from either the driver side or the passenger side, which brings more convenience for loading and unloading. (NOTE: There is protective film on the lid. Please peel off the film before use.)
  • FAIR CAPACITY: With 11.65 cubic feet maximum storage capacity and 150lbs loading capacity, the roof cargo carrier can allow for more space in your car. What’s more, its streamlined design will reduce drag and noise during driving.
  • LOCKING SYSTEM FOR SAFETY: It is designed with locks on both sides and comes with keys for protecting your valuables. And the stiffeners at the bottom of the roof cargo box strengthen its stability.
  • EASY TO INSTALL: It is simple in structure and light in weight (approximately 31.3lbs). It won’t be difficult for you to lift it and install it to your car. And it can work with most vehicles with crossbars, such as car, suv, van, etc. Applicable Cross Bar: Max. Width 2.36”. Max. distance between bottom holes for installation: 25.59”. Min. distance between bottom holes for installation: 18.5”.
  • QUALITY MATERIAL FOR DURABILITY & BETTER PROTECTION: Made from ABS material for long-lasting use. And it can protect your luggage or equipment from being exposed to sun, rain or dust. And it is protected with 3-Year Warranty.
Bestseller No. 7
DNA MOTORING Rooftop Cargo Box Carrier Lockable Heavy Duty Car Top Storage Case, Capacity 110 Lbs,...
  • 【UNIVERSAL】This extra long rooftop cargo carrier fits for vehicles with cross bars only, no tool assembly & installation. Increases vehicle cargo space without impeding on passenger comfort.
  • 【LARGE CAPACITY】Rooftop cargo box provides 11 cubic feet of additional storage space. The maximum storage capacity of 110lbs when evenly distributed. And it can be opened up to 14" wide to store bulky items.
  • 【ROBUST DESIGN】Constructed of rugged, impact-resistant ABS material for long-lasting durability, able to protect your contents from exposure to the inclement weather.
  • 【SECURITY LOCKING SYSTEM】Includes key and lock to secure valuables in the box, to ensure cargo safety and s proper lid alignment. It can open from the side and stays open til you close it.
  • 【SPECIFICATION】Size: 11 Cubic Feet Internal Storage, 110lbs Max Capacity | Overall Dimensions: 53" L x 34" W x 15" H | Surface Finish: Black Texture Finish
Bestseller No. 8
Thule Force XT Rooftop Cargo Box, X-Large
  • A versatile roof-mounted cargo box for everyday use
  • Provides 18 cubic feet of additional packing space
  • Designed to fit a wide range a vehciles with maximum space efficiency
  • Quick-mount system "clicks" when roof box is secure and properly mounted
  • Dual-side opening for easy access to all areas of the box, from either side of the vehicle
  • Full trunk access with no roof box contact
  • Fits 5-7 pairs of skis / 3-5 snowboards (up to 195 cm)
  • External dimensions: 82.75 x 33.75 x 17.25 inches
  • Internal Dimensions: 77.5 x 29.5 x 15.25 inches
  • Load capacity: 165 lbs; Product Weight: 47 lbs
Bestseller No. 9
15.5 Cubic Feet Rooftop Cargo Carrier Box, Heavy Duty Hard Shell Roof with Security Keys, Waterproof...
  • Perfect for Road Trip: Take the cargo box to the park, the beach, the sports field, or any place you need to store. Works on all vehicles with rack, suitable for cars, vans, SUVs, etc. Sleek aerodynamic design to reduce drag and has less noise.
  • High Quality Material: The roof box is manufactured from sturdy ABS and PMMA material for long-lasting use, able to protect your valuables from exposure to the elements and can load 130 lbs capacity, suitable for round, square, factory and most aerodynamic bars.
  • 15.5 Cubic Feet Cargo Box with Car Trunk Organizer: With the large capacity, the roof cargo box can help you securely carry 15.5 cubic feet worth of essentials, and can increase vehicle cargo space without impeding on passenger comfort, more capacity, and more pleasure!
  • Secure & Convenient Use: In order to keep your belongings secure, this vehicle cargo carrier is designed with the security lock that has keys. More importantly, Dual-sided opening for easy access on either side of your vehicle to increase efficiency and convenience.
  • Easy to Install: With equipped hardware and detailed instruction, the car rooftop cargo carrier is easy to be mounted to the car top. Then you can start a hassle-free trip with your family and friends to appreciate the wonderful scenery along the way.
Bestseller No. 10
DuraLiner Rooftop Cargo Carrier for Cars - Waterproof Hard Shell Roof Top Mount Car Storage - Easy...
  • LARGE STORAGE CAPACITY: The Car Rooftop Cargo box offers more than 10 cubic feet of storage capacity, making it a perfect choice for carrying bulky items like luggage, camping gear, & sports equipment. Car topper luggage carrier helps to free up valuable space inside your vehicle for passengers & other essentials. Whether you're going on a leisure trip or a work-related one, DuraLiner rooftop cargo box has enough room to hold all your necessary items.
  • ROBUST & COMPACT DESIGN: The Cargo rooftop box is crafted to fit most roof racks with ease and is simple to install and remove. The hardshell rooftop cargo carrier is made from durable materials, enabling it to withstand harsh weather conditions & rugged terrains. Duraliner roof carrier is watertight & lockable, ensuring your belongings stay protected from water damage.
  • STURDY MATERIAL: Heavy-duty plastic resists UV damage and maintains a rich finish to protect your belongings from weather. The Cargo Box has a sturdy and long-lasting construction made possible by High-density polyethylene (HDPE), which can withstand harsh environmental conditions.
  • EASY INSTALLATION: DuraLiner Cargo Boxes are simple and easy to install. The tool-free assembly and U-bolt securing feature make it a quick process, allowing you to hit the road in minutes. These cargo boxes can be mounted with ease onto most vehicles with Roof rack cargo boxes. Vehicle Cargo Carriers design features a sealed lip, rear entry, and a four-corner latching system to ensure the safety and dryness of your belongings. It is durable & recyclable.
  • COMPATIBLE WITH MOST VEHICLES: Car roof cargo carrier is compatible with numerous car makes and models, including Chevrolet, Ford, Isuzu, Jeep, Mazda, Mercedes, Mitsubishi, Nissan, Sprinter, Toyota, and more. Its universal mounting system is adaptable to various roof rack systems, making it a convenient option for customers with different car brands. The Rooftop cargo is specifically designed to fit and function with the roof racks or crossbars of these particular car models.

Last Update : 2024-03-26

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