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Film Repeat Length Calculator

Estimate machine film repeat/cut length from finished bag length and top/bottom seal allowances. Formula: repeat = finished bag length + top seal allowance + bottom seal allowance. Assumes allowances are total added machine-direction lengths for one bag repeat; verify with the bagger setup 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 and seal dimensions

Range: at least 0 in

Enter the finished bag dimension in the film machine direction. It must be greater than zero.

Range: at least 0 in

Enter the added machine-direction length for the top seal for one repeat; zero is allowed if none is required. Do not include the same allowance in finished bag length.

Range: at least 0 in

Enter the added machine-direction length for the bottom seal for one repeat; zero is allowed if none is required. Do not include the same allowance in finished bag length.

Result

Valid
Estimated film repeat length
8.500 in
Combined seal allowance
0.500 in

Calculation

Combined seal allowance
—
Estimated film repeat length
—

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