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Vacuum Seal Bag Size Calculator

Estimate usable vacuum bag width and length from item dimensions, thickness and chosen allowances. Round up, allow for seams and test the fit before cutting.

Use this result well

Inputs that matter
Item width, Item length, Item height, Extra width allowance, and 2 more
Output to expect
Estimated usable pouch size
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Estimate a flat vacuum pouch size

Measure a roughly rectangular solid item. Height adds material around both its width and length. Add the usable fit and sealing allowances for your bag and machine, then round upward.

Flat width ≥ item width + height + width allowance; usable length ≥ item length + height + total end allowance

Source: FoodSaver: GameSaver Titanium FAQs — sealing tail example

Read the result with its conditions

The example’s 0.5-inch extra width is an adjustable planning choice. The 3-inch tail illustrates FoodSaver GameSaver Titanium guidance; other machines may differ. Compare usable interior dimensions. Add any material consumed by bottom or side seals when cutting raw roll stock. Test fit, sharp corners, seam clearance and machine compatibility before cutting a batch. Liquids, irregular items and gusseted bags need a different fit check.

Updated: September 2026

Example Scenarios

Enter 6 × 8 × 2 in, 0.5 in extra width, 3 in total extra ends and 0.25 in rounding.

→ Estimated usable pouch size: 8.5 × 13 in. Check actual interior dimensions and seams.

Common Mistakes to Avoid

Ignoring item thickness or seam material

Height adds material to both dimensions. Compare usable interior dimensions and add raw-stock material consumed by seals separately.

FAQ

A flat pouch must wrap both sides of the item. Half of the rectangular cross-section perimeter is width plus height, before loading clearance.

No. Compare usable interior dimensions and test the actual pouch. Nominal outer sizes, seams and irregular food shapes can change the fit.

This estimates dimensions only. Follow the food’s preparation, temperature and storage guidance.

About Vacuum Seal Bag Size Calculator

Flat pouch width spans half the item’s width-height perimeter. This is a fit estimate.