Free Draft Beer Carbonation & Line Balancing Calculator
Calculate exact CO2 regulator pressure (PSI) using Henry’s Law and balance draft beer line length to pour crisp, foam-free pints.
🍺 Carbonation & Kegerator Specs
📊 Equilibrium PSI & Line Length
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Frequently Asked Questions
Why should I never lower my CO2 pressure to stop draft beer foaming?
Lowering regulator pressure drops the head pressure below Henry’s Law equilibrium. Carbon dioxide immediately breaks out of solution inside the keg and beer line, creating massive foam turbulence. Fix foam by lengthening your 3/16" beer line, NOT by lowering regulator pressure.
What is the standard carbonation level for an American IPA or Stout?
American IPAs, pale ales, and lagers are typically carbonated to 2.4 to 2.6 volumes of CO2. British stouts and milds are low carbonation (1.8 to 2.2 volumes), while Belgian ales and wheat beers range from 2.8 to 3.5 volumes.
Why is 3/16-inch tubing used instead of 1/4-inch tubing for draft beer?
3/16" ID tubing provides high flow resistance (2.7 to 3.0 PSI per foot), allowing you to balance a 12 PSI kegerator with a compact 5-to-6 foot line. 1/4" tubing has very low resistance (0.85 PSI/ft), which would require an awkward 15-foot coil of tubing inside your fridge!
How long does it take to carbonate a keg of beer at serving pressure?
At standard serving pressure (11 to 12 PSI at 38°F), a cold keg takes 7 to 10 days to achieve full Henry’s Law carbonation equilibrium through passive absorption.