About this calculator

Estimate carton tape for either two center strips or a six-strip top-and-bottom H seal. Seam spans and allowance at both ends determine each cut length before carton quantity and total allowance are applied.

Inputs

How to use this calculator

Carton group

  1. Center seam length (in)Length of the closed top/bottom center seam.
  2. Transverse edge seam width (in)Width used by each H-seal edge strip.
  3. Identical cartonsA whole non-negative count.

Shared inputs

  1. Sealing layoutEach strip receives the end allowance below at both ends.
  2. Additional length at each strip end (in)Your selected edge overrun. Its example value is not a universal carrier requirement.
  3. Additional allowance (%)Applied to the calculated total. This is an editable example, not a material performance standard.
  4. Usable tape length per roll (in)Enter in the selected length unit; 2,160 in = 60 yd.

Enter the shipment or scenario values, then select Calculate result.

Method

Formula and variables

Two-strip model per carton = 2 × (center seam + 2 × end allowance). H-seal model adds 4 × (transverse width + 2 × end allowance). Multiply quantities, sum, add percentage allowance, and ceil(total ÷ usable roll length).

Center seam length (in)
Length of the closed top/bottom center seam.
Transverse edge seam width (in)
Width used by each H-seal edge strip.
Identical cartons
A whole non-negative count.
Sealing layout
Each strip receives the end allowance below at both ends.
Additional length at each strip end (in)
Your selected edge overrun. Its example value is not a universal carrier requirement.
Additional allowance (%)
Applied to the calculated total. This is an editable example, not a material performance standard.
Usable tape length per roll (in)
Enter in the selected length unit; 2,160 in = 60 yd.

Interpret the result

Required length includes all cuts for the chosen pattern. Whole-roll count is a pooled length minimum, so actual cut lengths and waste can change purchasing needs.

Outputs: Tape length and roll count by seal pattern

An explicit top-and-bottom six-strip H layout or two-strip layout. Does not choose suitable tape, adhesive, width, box condition or sealing performance. Minimum rolls by length ignores unusable offcuts and cut scheduling; a required strip longer than a roll is rejected.

Worked example

Check the arithmetic

This example uses the starting values shown above. The arithmetic below is calculated independently of the interactive result.

Work through the calculation

  1. Two center strips = 2 × (12 + 2 × 3) = 36 in. Four transverse strips = 4 × (10 + 2 × 3) = 64 in.
  2. H-seal total = 100 in/carton × 100 cartons = 10,000 in; with 10% allowance = 11,000 in.
  3. 11,000 ÷ 12 = 916.666667 ft; ceil(11,000 ÷ 2,160) = 6 rolls minimum.

Compare the displayed result

Expected displayed result: 916.667 ft

FAQs

How many strips are included in H sealing?

The model uses two center strips and four transverse strips. Each strip adds the entered end allowance at both ends.

Example inputs and options

Starting values are examples unless a field identifies a dated rule. Unit selectors convert only fields marked for conversion. Rates and model options keep the units and basis shown in their labels.

Center seam length (in)
Example: 12
Transverse edge seam width (in)
Example: 10
Identical cartons
Example: 100
Sealing layout
Example: H seal: three strips on top, three on bottomOptions: Two center strips: top and bottom; H seal: three strips on top, three on bottom
Additional length at each strip end (in)
Example: 3
Additional allowance (%)
Example: 10
Usable tape length per roll (in)
Example: 2160