Width  Film  Weight  Film   
    Inches Length  Ounces Gauge   
If you are unsure of a film's gauge you can use this tool
to determine the approximate gauge.
Cut a sample of the film.  20 feet or more is
recommended for better resolution.
Film Width in Inches
Film Length in Feet
Weight in Ounces
The Film Gauge will calculate automatically.
Measuring with equipment capable of displaying
hundredths of ounces will give you a much better
estimate of gauge that a scale that only reads tenths.
The more accurate your length is the better your results
will be.
This method certainly separates a 63 gauge from an 80
gauge but will not be able to identify a
79 gauge versus an 80 gauge.