How to Cut Memory Foam for Your Next Project

Learn how to cut memory foam for your next project with these easy steps. Plus, find out what tools you’ll need to get the job done right.

Checkout this video:


Memory foam is a specialized type of foam that is designed to contour to your body and provide support and comfort. It is often used in mattresses, but can also be used in other applications such as padded chairs, pillows, and other types of upholstery.

If you are working on a project that requires memory foam, you will need to know how to properly cut it. Luckily, cutting memory foam is relatively easy as long as you have the right tools. In this article, we will show you how to cut memory foam for your next project.

What You’ll Need

-A saw that can cut foam
-A straight edge to guide your cuts (a ruler or a level will work)
-Marking tools (a pencil or a Sharpie)
-protective eyewear

With these simple tools, you’ll be able to cut memory foam for any project.

Cutting the Memory Foam

Assuming you have your memory foam cut to the desired size, there are three ways to go about cutting it. The first and most common way is with a kitchen knife. A bread knife or a carving knife works well for this. Simply score the top of the foam lightly with the knife, being careful not to cut too deeply. Once you have scored the foam, bend it back and forth until it snaps cleanly along the score line.

For a cleaner cut, you can use a hot wire cutter. This is simply a length of nichrome wire that is heated electrically. You can buy hot wire cutters specifically for cutting foam, or you can make your own using nichrome wire and a power supply (a 9-volt battery will work in a pinch). To use a hot wire cutter, simply stretch the wire taut between two points and turn on the power supply. Touch the hot wire to the foam where you want to make your cut and hold it there until the foam melts through. The advantage of using a hot wire cutter is that it gives you a very clean, straight cut with little effort.

If you need to make curved cuts or intricate shapes, an electric carving knife will give you the best results. Carving knives are similar to hot wire cutters in that they have a blade that is heated electrically. However, carving knives also have a handle that allows you to guide the blade as you carve. This makes them much easier to use than hot wire cutters, but they can be more expensive as well.

Finishing Up

Now that you have your piece of memory foam cut to size, there are a few things you can do to finish it off. You can use a serrated knife to create a beveled edge, or create a pillow top by wrapping the foam in fabric and tufting it. You can also add buttons or other decorations to the top of the foam. If you plan on using your memory foam outdoors, you can coat it with a UV-resistant paint or varnish.


In conclusion, when cutting memory foam, it is important to use a sharp knife and to make sure that the foam is supported so that it does not crumble. It is also important to be aware of the density of the foam so that you can adjust the depth of your cuts accordingly.