Roll Film Calculator
Turn a printed-film roll spec into the numbers production and purchasing need: roll weight, film weight per metre and how many bags one roll yields. Enter web width, thickness, material density, roll length and bag pitch.
Roll weight & yield
Width in mm, thickness in micron, length in metres.
Results
Reverse: how much film for an order?
Enter the number of bags you need. The tool uses the current pitch, lanes, waste and weight settings to estimate length and weight.
How roll weight & yield work
A film roll is a long rectangle of known width and thickness, so its weight scales with length:
- Grams per metre = width (mm) × thickness (µm) × density ÷ 1000
- Roll weight (kg) = g/m × length (m) ÷ 1000
- Bags per roll = length (m) × 1000 ÷ pitch (mm)
- Multi-up layouts: multiply impressions by the number of lanes across the web.
Add a few percent for start-up and splice waste. Values are for planning only.
Film weight per square metre
| Structure | Basis | Approx. weight |
|---|---|---|
| PET 12µm + PE 80µm | ~ 12×1.4 + 80×0.92 | ~ 91 g/m² |
| PET 12 + AL 7 + PE 80 | laminate avg ≈ 1.25 | ~ 124 g/m² |
| Matte BOPP 30µm | 30 × 0.905 | ~ 27 g/m² |
| Kraft 60gsm + PE 60µm | paper + film | ~ 115 g/m² |
Ready to order? Get these bag types made
Turn the numbers above into a finished spec sheet. Send us your dimensions, material and quantity and our engineers reply with a firm quote and free samples within one business day, produced in-house at our own cleanroom facility.
Roll Film / Roll Stock
Printed roll stock for automated form-fill-seal lines
Stand-Up Pouches
Resealable, shelf-ready pouches for food, coffee and supplements
Coffee Bags
Coffee pouches with degassing valves and barrier film
Flat-Bottom Bags
Box pouches with a premium, four-panel shelf presence
Need this spec produced, not just calculated?
We are a direct manufacturer of custom flexible packaging, producing in-house since 2005 in a cleanroom facility. Send us your target numbers and our team will confirm feasibility and quote, with free design support included.
Frequently asked questions
How do I calculate the weight of a film roll?
Multiply web width (mm) by thickness (µm) and density (g/cm³), divide by 1000 to get grams per metre, then multiply by roll length in metres and divide by 1000 for kilograms.
How many bags can one roll of film produce?
Divide the roll length in millimetres by the bag pitch (repeat length) in millimetres, then multiply by the number of lanes across the web. Deduct a few percent for waste.
What is bag pitch or repeat length?
Bag pitch is the length of film consumed by one bag along the machine direction, which equals the printed repeat length of one impression.
Does the supplier offer printed roll stock as well as finished bags?
Yes. We supply printed roll stock for automated packaging lines as well as finished pouches and bags. Contact us with your structure and quantity for a quote.
Results are engineering estimates for planning and quoting. Real-world values vary with material lot, structure, tolerance and process. For production-grade figures, confirm with our team.