Mini-ITX Case Volume Comparison Tool | Compare Case Sizes
Mini-ITX Case Volume Comparison Tool
Why Liters Alone Don’t Tell You What You’re Actually Comparing
Case makers usually show only the one-liter size on the box because smaller numbers attract people building small PCs. But this number can hide important details about the case’s shape. Besides total space, the actual size and shape affect things like how long the GPU can be, how tall the cooler can fit, and how much room there is for the power supply. For example, a short, wide case and a tall, narrow case might both be about 15 liters, but they can hold very different parts. So, you can’t always switch two cases just because they have the same volume.
This comparison tool lets you see your entries next to three popular reference cases from our reviews, giving the numbers real-world meaning. It also calculates volume from width, depth, and height, so you can easily compare cases side by side.
Reading The Comparison And What Volume Actually Predicts
Although raw volume is a good indicator of how much a case will take up on your desk or floor, it is not a reliable indicator of what will fit inside. A slightly smaller case designed with a longer, narrower footprint specifically for card length will likely have more GPU length clearance than a case with more total volume distributed as additional width for radiator mounting. Instead of assuming that a higher liter number will solve the issue, use our specialized clearance calculators to directly check GPU or cooler clearance specs.
Volume comparison is useful when choosing between cases that you are already certain will fit your components; the only thing left to consider is how much actual space each one takes up on your desk or beneath it. All other things being equal, if you have to choose between two cases that will fit your GPU and cooler comfortably, the smaller volume option is usually the better choice for a small-space build because it’s the dimension most directly related to the amount of desk or floor footprint you’re giving up.
You can quickly determine where a case you’re considering falls within the larger small-form-factor category if it lands significantly above or below the reference bars, which let you calibrate your own numbers against cases already covered in our mini-ITX case testing.
Frequently Asked Questions
How do I calculate PC case volume in liters?
To find the volume in liters, multiply the case’s internal width, depth, and height in millimeters, then divide by 1,000,000. This simple box calculation is close to manufacturer-rated figures, though those sometimes consider irregular shapes and cutouts.
Does a smaller liter case always mean less GPU clearance?
Not always. For GPU clearance in particular, a case’s shape is more important than its total volume because two cases with the same liter rating can have very different depth dimensions, and GPU length clearance is mostly determined by depth rather than total volume.
What is considered a small mini-ITX case?
In the mini-ITX category, cases smaller than 15 liters are usually seen as small. Many popular cases are between 10 and 20 liters. Some mini-ITX builds can be as compact as 5 liters, while others go up to 30 liters or more if you want more space for parts and better airflow.
Why do two cases with the same volume fit different components?
Parts like the GPU or cooler will only fit if their exact size matches the inside space, even if two cases are the same overall size. For example, a short, wide case and a tall, narrow case may be the same size, but there can be big differences in the space available for some parts.
