Convert firkin (beer 1688-1803) to ounce (fl oz) (U.S. food labeling)
Selected category: volume.
Definition and details for firkin (beer 1688-1803):
Firkin in 1688 was defined as 8.5 ale gallons or about 39.28 liters.
Definition and details for ounce (fl oz) (U.S. food labeling):
US regulation 21 CFR 101.9(b)(5)(viii) defines a fluid ounce as exactly 30 millilitres for use in nutrition labeling only.