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Film Web Width Calculator

Estimate the layflat web width for a center-fold bag from finished face width, total side-seal allowance, and total edge-trim allowance. Formula: web width = 2 × finished face width + total seal allowance + total trim allowance. Confirm the fold and allowance conventions with the bagger and film supplier.

Example values are prefilled to demonstrate the calculation. Replace them with values for your product, package, equipment, and operating conditions.

Inputs

Bag width and allowances

Range: at least 0 in

Enter the width of one finished face of the center-fold bag. It must be greater than zero.

Range: at least 0 in

Enter the combined additional web width reserved for both side seals, not the per-side value; zero is allowed.

Range: at least 0 in

Enter total edge trim across the web, not per-edge trim; zero is allowed.

Result

Valid
Base web width before allowances
8.000 in
Combined seal and trim allowances
0.750 in
Estimated layflat web width
8.750 in

Calculation

Base web width before allowances
—
Combined seal and trim allowances
—
Estimated layflat web width
—

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