Blow Up Ratio Calculator
Calculate blown-film blow-up ratio from bubble diameter and die diameter.
A QUICK WALKTHROUGH
How to use this tool
- Enter the measurements using the stated consistent units.
- Review the model assumptions.
- Calculate locally in your browser.
Formula and limits
BUR = bubble diameter ÷ die diameter. Diameters must use the same unit; this does not recommend film properties. This is a simplified arithmetic model; it does not select process settings or guarantee product quality.
Privacy
Inputs remain in this browser and are not uploaded.
GOOD TO KNOW
Common questions
Does this guarantee production results?
No. It calculates the stated nominal relationship only.