Establish the measurement and quote basis
Compare the area needed for the same qualified job, not kilogram prices alone. Obtain actual GSM and verify that both films meet processing and protection requirements.
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
Film A at 60 GSM and EUR 3/kg costs EUR 0.18/m². Film B at 50 GSM and EUR 3.40/kg costs EUR 0.17/m². For 10,000 m² the material difference is EUR 100 before waste and delivery.
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
Include observed processing yield and measured consumption for each option. A thinner film that needs extra wraps or causes rejection can reverse the apparent saving.
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
Does lower area cost mean I should switch?
No. Confirm equivalent performance and calculate delivered usable-job cost. Material price alone does not qualify sealing, puncture resistance or containment.
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.