Gusset Bag Size Calculator
Enter the bag width and the side or bottom gusset depth to get the flat film width, opened width and a folding reference for side gusset, bottom gusset and quad-style bags.
Bag dimensions
Total depth when opened. Each fold is half of this value.
Total depth when opened. The fold is half of this value on each side.
Extra allowance per seal edge (top / back seam).
Results
| Part | Size | Note |
|---|
How to use
- Choose side gusset, bottom gusset or both.
- Enter the bag width, height and the total gusset depth.
- Add a seal allowance if your factory requires it, then press Calculate.
- Use the flat film width and length for film ordering or bag drawings.
Formulas and assumptions
- Side gusset flat width = 2 x W + 2 x G + seal allowance.
- Opened width = W + G (side gusset depth added to the front).
- Film length = H + B (bottom gusset) + seal allowance.
- Each fold = gusset depth / 2. Results are theoretical; film thickness is ignored.
Practical tips
- Keep each fold smaller than half of the bag width for stable shape.
- Confirm tolerances and film thickness with your supplier before production.
- Quad seal and flat-bottom bags may need extra allowance at the corners.
Frequently asked questions
Common questions from buyers who use this calculator to plan custom gusset bags and flexible packaging.
Can you make gusset bags in my custom size?
Yes. Custom width, height and gusset depth are our core service. Use the calculator to get a starting size, then send it to us and our team will check it against the filling volume and the product you plan to pack.
Which bag styles and materials are available?
We can produce side gusset bags, bottom gusset bags, quad seal bags and flat-bottom pouches. Typical structures include laminated plastic films, kraft paper, and foil-lined options. The best choice depends on your product, shelf life and barrier needs.
What information do I need to send for a quote?
Please send bag width, height, gusset depth and unit, the material or product to be packed, print colours and artwork if available, extras such as zipper, valve, tear notch or hang hole, and the order quantity.
What are your MOQ and lead time?
MOQ and lead time depend on bag size, material, number of print colours and order volume. Send us your specification and quantity, and we will reply with a clear MOQ and production schedule for your project.
Is the calculated size the final finished bag size?
No. The results are theoretical and ignore film thickness, sealing shrinkage and tolerance. Treat them as a reference for planning. We confirm the final film width, cutting length and a drawing with you before production.
How do I choose the right gusset depth?
A deeper gusset gives more capacity and a more stable shape, but needs more film. As a rule of thumb, each fold should stay below half of the bag width. Share your product weight or volume and we can suggest a suitable depth.
Can you print my logo and design on the bags?
Yes. We support custom printing for brand logos, product information and full designs. Send your artwork or a rough idea, and we will advise on print area, colour count and the best finish for your market.
Do you provide samples and export shipping?
We serve overseas buyers and can arrange samples before mass production, as well as export packing and shipping to your destination. Contact us with your country and quantity to discuss sample terms and delivery options.
Shenzhen Yongliantai New Material Technology Co., Ltd. supplies custom gusset bags and packaging for international customers. Not sure about a size or material? Contact us
Need custom gusset bags or a quotation? Send us your size and quantity.
Request a quote [email protected] +8618219445665