Film Usage Calculator
Work out packs per roll, film per pack and film cost per pack from roll length, pitch and lanes — the material economics behind flexible and thermoform packaging.
Inputs
Result
Web yield only — add lidding/second web separately, and allow for splice and start-up waste. For down-gauging savings, see the material guides in the Knowledge Base.
How to use itWork out film yield and cost per pack
- Enter the roll length — the running length of film on the roll (m or mm).
- Enter the pitch and lanes — how far the film advances each cycle, and how many packs sit across the web. Together they set how much film each pack consumes.
- Add the film cost per roll (optional) to get a film cost per pack, plus how many rolls you burn per 10,000 packs.
Why it mattersWhy film yield drives packaging cost
Film is usually the largest single material cost in flexible and thermoform packaging, and small changes in yield compound fast at volume. Knowing exactly how many packs a roll produces — and the film cost per pack — lets you compare films on a true cost-per-pack basis, size your consumption and stock, and quantify the saving from a wider web, a tighter pitch, more lanes or a down-gauge before you commit.
The mathsThe formulas
Film per pack = pitch ÷ lanes
Cost per pack = roll cost ÷ packs per roll
Each machine cycle advances the film by one pitch and produces one row of packs (one per lane). This tool counts the forming/main web only — a lidding film or second web is a separate roll and should be added on top, and real yield is a few percent lower once splices and start-up waste are included.
Where the savings areCutting film cost per pack
The biggest levers are adding lanes (more packs per cycle from the same length), tightening the pitch (less film between packs), running a wider web, and down-gauging to a thinner film or a mono-material where the specification allows. Each drops the film per pack directly. See the material guides in the Knowledge Base for down-gauging and mono-material options.
FAQFrequently asked questions
How do I calculate how many packs a roll of film makes?
Divide the roll length by the film advance per cycle (the pitch) to get the number of cycles, then multiply by the number of packs across the web (lanes): packs per roll = (roll length ÷ pitch) × lanes.
How do I work out film cost per pack?
Divide the cost of a roll by the number of packs it produces. Lowering film cost per pack means getting more packs from each roll — more lanes, a tighter pitch, a wider web, or a thinner gauge.
What is the pitch in a packaging machine?
The pitch, or index, is how far the film advances on each machine cycle — effectively the length of film used per row of packs. A shorter pitch packs more units into the same roll length.
Does this include the lidding film?
No. This calculates the forming or main web only. A lidding film or a second web is a separate roll and should be costed on top of the web yield shown here.
Why is my real film usage higher than calculated?
Roll splices, threading and start-up scrap, edge trim and rejects all consume film that the ideal yield ignores. Allowing a few percent over the theoretical figure gives a realistic consumption.