arched bookcase ikea hack

IKEA Arched Bookcase Hack: Transform Your Space

By Sarah ThomasApril 22, 2026

Transforming your space into a cozy, well-organized haven has never been easier, thanks to the versatile and affordable furniture options at IKEA. One standout piece that's captured the hearts of many is the KALLAX shelving unit. But what if you could elevate its functionality and style with a simple hack? Enter the arched bookcase, a stunning and practical addition to any room.

By combining the KALLAX with a few extra materials, you can create an eye-catching arched bookcase that's perfect for displaying your favorite books, decor, and more. Not only does this hack add a touch of elegance to your space, but it also maximizes your storage potential. So, let's dive into the world of IKEA hacks and explore how to create your very own arched bookcase.

Gathering Your Materials and Tools

Before you embark on your arched bookcase journey, you'll need to gather a few essential materials and tools. The good news is that most of these items are readily available at IKEA or your local hardware store.

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Here's a list of what you'll need:

IKEA KALLAX shelving unit (5x5 or 4x4)
MDF or plywood (for the arch and shelves)
Wood glue
Screws and a drill
Jigsaw or circular saw
Sandpaper
Paint or stain (optional, for finishing)

Choosing the Right KALLAX Unit

The KALLAX unit is available in two sizes: 5x5 and 4x4. For an arched bookcase, the 5x5 unit provides more space and a grander appearance. However, the 4x4 unit is a great option if you're working with a smaller space. Choose the size that best fits your needs and the dimensions of your room.

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Additionally, consider the finish of the KALLAX unit. The natural wood finish can be left as is or stained to match your arch. If you opt for a white or black KALLAX, you may want to paint your arch to ensure a cohesive look.

Designing Your Arch

Now that you have your KALLAX unit, it's time to design the arch that will transform it into a stunning bookcase. The most common arch shape is a simple, half-circle design. However, you can also create more intricate designs, such as pointed arches or elliptical arches, depending on your skill level and the look you're aiming for.

To create your arch, you'll need to measure and cut the MDF or plywood. A good starting point is to make the arch about 2/3 the width of your KALLAX unit. For a 5x5 unit, this would be approximately 30 inches. You can adjust this measurement to suit your preferences and the size of your room.

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Assembling the Arched Bookcase

With your materials gathered and your arch designed, it's time to start assembling your arched bookcase. This process involves attaching the arch to the KALLAX unit and adding additional shelves to create a seamless look.

Before you begin, make sure to sand any rough edges on your arch and KALLAX unit. This will ensure a smooth finish and prevent any injuries during the assembly process.

Attaching the Arch

To attach the arch to the KALLAX unit, you'll need to use wood glue and screws. Apply a generous amount of glue to the back of the arch, then carefully position it on top of the KALLAX unit. Use clamps to hold the arch in place while the glue dries.

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To have these arches fit perfectly on these @ikeausa IKEA Billy bookcases was such a relief! 🤩 ‌ 📚I know I’m not the first DIYer to put arches on Billy bookcases, but I don’t often see people cut 2 arches in 1 material piece. 🤭 ‌ 🤔I’d seen other DIYers do separate arches and then try to mend them together. Then most would do these options: ‌ People try option 1: spending their time trying to hide the seam between the two arches with wood filler or putty . 👉But…. a lot of DIY fails happ... Billy Arch Hack, Kitchen Bookshelf, Ikea Built In, Billy Bookcase Hack, Ikea Bookcase, Diy Fails, Diy House Renovations, Ikea Billy, Ikea Billy Bookcase

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Once the glue has dried, drill screws through the arch and into the KALLAX unit for added support. Make sure to predrill holes to prevent the MDF or plywood from splitting. Allow the screws to set before moving on to the next step.

Adding Additional Shelves

To create a seamless look, you'll need to add additional shelves to your arched bookcase. These shelves will help to connect the arch to the KALLAX unit and provide extra storage space.

Measure and cut your shelves to fit the width of your KALLAX unit. You'll need two shelves for a 5x5 unit and one shelf for a 4x4 unit. Attach these shelves to the KALLAX unit using screws, making sure they're level with the top of the arch.

Finishing Touches

With the assembly complete, it's time to add the finishing touches to your arched bookcase. This step is optional but can help to elevate the look of your hack and ensure it blends seamlessly with your decor.

If you'd like to paint or stain your arched bookcase, now is the time to do so. Choose a color or stain that complements your room and the existing furniture. Allow the paint or stain to dry completely before moving on to the next step.

Styling Your Arched Bookcase

With your arched bookcase assembled and finished, it's time to style it and make it your own. Start by organizing your books and decor, grouping like items together for a cohesive look. Consider using baskets or bins to hide clutter and add texture to your display.

Don't be afraid to mix and match styles and colors. The beauty of an arched bookcase is its versatility – it can add a touch of elegance to a modern space or a rustic charm to a traditional home. So have fun with it and let your personality shine through!

As you admire your newly created arched bookcase, take a moment to appreciate the transformation you've achieved. By combining the humble KALLAX unit with a few extra materials and a bit of creativity, you've turned an ordinary shelving unit into a stunning, functional piece of furniture. So go ahead, show it off, and enjoy the compliments that are sure to come your way. Happy hacking!