Are you getting frustrated trying to figure out the capacity of plastic bags or pouches? So was I! The math for this is really complex, so I set up this calculator to do it for you. Hope this helps!
This tool helps you estimate the internal capacity of a bag or pouch using just the dimensions you already know. It works for flat bags, stand-up pouches, zipper bags, and more.
After entering your measurements, you’ll get an approximate volume shown in different units—use whichever is most useful for your product or packaging type.
Online sellers, small manufacturers, warehouse teams, food packagers, and DIY crafters all use this calculator to quickly understand how much space a bag provides.
There’s nothing to install and no personal information needed—just a simple calculator that works right in your browser.
Check out the Common Bag Sizes Chart for ready-made examples of popular bag dimensions and their estimated capacities.
Yes—whether you're choosing packaging for a new product or mailing samples, knowing the volume of a bag helps you avoid over- or under-packing. For example, two bags might look similar in size but hold very different amounts if one has side gussets or a stand-up base. This calculator makes that difference obvious.