Packing Tape Length per Box Calculator
Count top and bottom centre seams. H-seal adds two cross strips on each face. Extension is added at both ends of every strip.
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Replace the example values with figures from your supplier sheet or measurements. Choose the unit beside each value. Results update as you type; fix any highlighted field before using the result.
GSM means grams per square metre. Net weight excludes the core and other packaging. MOQ means the minimum order quantity. An optional field can stay blank unless the result you need depends on it.
Prices keep the selected currency; changing its label does not convert an exchange rate. Save or export the result after checking your inputs.
Ideal tape per carton
Centre seal = 2 × (Seam + 2 × Extension); H-seal adds 4 × (Width + 2 × Extension)
length = 400; width = 300; overlap = 50; pattern = centre → Ideal tape per carton = 1 mSaved calculations stay in this browser. No account or cloud backup is created.
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Calculated from your inputs. Confirm specifications with your supplier.
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Vary one input and inspect ideal tape per carton
All other entered inputs stay fixed. Ranges are your scenarios, not statistical confidence or supplier performance predictions. This uses the same validated calculator engine.
The formula, made clear.
Count top and bottom centre seams. H-seal adds two cross strips on each face. Extension is added at both ends of every strip.
How to use this calculator
- 01
Confirm carton seam length, carton cross-strip width, extension per strip end, sealing pattern.
- 02
Enter consistent units; zero means a confirmed absence of a charge or allowance.
- 03
Review the arithmetic, rounding and limitations before using the result in a purchasing decision.
A calculation you can check
400 mm seams with 50 mm end extensions use 1 m for centre seals; 300 mm cross strips give 2.6 m for H-seal.
- Carton seam length
- 400 mm
- Carton cross-strip width
- 300 mm
- Extension per strip end
- 50 mm
length = 400; width = 300; overlap = 50; pattern = centre → Ideal tape per carton = 1 mCheck the displayed formula and units against your quotation. Use measured GSM, net weight and actual layout dimensions where available. Default densities are planning assumptions, not certified material properties. Calculated cost does not certify strength, compatibility or safe loading.
Method, units and material assumptions ↗