AustraliaTier 2
Force carbonation calculator
Beer temperature and target CO₂ volumes in. Regulator PSI out.
Free·No sign-up·Last checked 2026-08-27
Formula
T_F = T_C × 9/5 + 32
PSI = −16.6999 − 0.0101059T_F + 0.00116512T_F² + 0.173354T_F·V + 4.24267V − 0.0684226V²
Worked example. 3°C targeting 2.4 volumes → about 9.9 PSI.
Method
Regression fit in PSI, kept in PSI
This regression was fit against temperature in °F and pressure in PSI, so this calculator converts your °C input to °F internally before applying it. The result is left in PSI, since kegging regulators and hardware are graded in PSI internationally regardless of locale.
Questions
CO2 is more soluble in cold liquid, so a colder keg absorbs the same number of volumes at a lower pressure than a warmer one would need.
Set-and-forget at serving pressure typically takes 1–2 weeks to fully equalize; agitating the keg or using a higher pressure briefly can shorten that to a day or two, but this calculator only gives the equilibrium PSI, not a timeline.