Establish the measurement and quote basis
A roll quote needs net film mass. Obtain gross scale weight and independently confirmed core and wrap tare before converting.
Record the SKU, date, source document and unit beside the observation. Mark an estimate as provisional so it cannot be mistaken for supplier-confirmed data.
Worked purchasing example
A EUR 72 roll weighing 26 kg gross with 2 kg tare contains 24 kg film: EUR 3/kg. At 60 GSM this is EUR 0.18/m². Dividing by 26 kg would give EUR 2.769/kg and understate material price.
These figures are illustrative arithmetic, not market prices or a promised saving. Replace them with measurements and offers covering your actual job.
Turn the result into a decision
Keep the tare evidence with the quote. Compare area cost only after confirming equivalent material structure and measured GSM.
Use the linked calculator to check the same boundary, then include complete known order charges in comparison. Preserve unresolved items in the specification rather than replacing them with zero.
Common questions
How should freight be treated?
Add an allocated shipment charge once after normalising the material subtotal; do not add it if the roll price already includes the same freight.
Are the example prices current supplier quotes?
No. They are illustrative values chosen to demonstrate the calculation. Enter current confirmed offers for the same specification and quantity.