TABLE Look at the row that corresponds to your keg temperature, and read the number at the column corresponding to the desired carbonation level. That number is the pressure to apply to the beer, in PSI. PRESSURE REQUIRED FOR DESIRED CARBONATION Volumes of CO2 desired Temp 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 32F 3.5 4.4 5.4 6.3 7.3 8.2 9.2 10.1 11.0 12.0 12.9 34F 4.3 5.3 6.3 7.3 8.2 9.2 10.2 11.2 12.1 13.1 14.1 36F 5.1 6.2 7.2 8.2 9.2 10.2 11.2 12.3 13.3 14.3 15.3 38F 6.0 7.0 8.1 9.1 10.2 11.2 12.3 13.3 14.4 15.4 16.5 40F 6.8 7.9 9.0 10.1 11.2 12.3 13.4 14.4 15.5 16.6 17.7 42F 7.7 8.8 10.0 11.1 12.2 13.3 14.4 15.5 16.7 17.8 18.9 44F 8.6 9.7 10.9 12.1 13.2 14.4 15.5 16.7 17.8 19.0 20.1 46F 9.5 10.7 11.8 13.0 14.2 15.4 16.6 17.8 19.0 20.2 21.3 48F 10.4 11.6 12.8 14.0 15.3 16.5 17.7 18.9 20.1 21.4 22.6 50F 11.3 12.5 13.8 15.0 16.3 17.6 18.8 20.1 21.3 22.6 23.8 52F 12.2 13.5 14.8 16.1 17.3 18.6 19.9 21.2 22.5 23.8 25.1 54F 13.1 14.4 15.7 17.1 18.4 19.7 21.1 22.4 23.7 25.0 26.3 56F 14.0 15.4 16.7 18.1 19.5 20.8 22.2 23.6 24.9 26.3 27.6 58F 15.0 16.4 17.8 19.2 20.6 21.9 23.3 24.7 26.1 27.5 28.9 60F 15.9 17.3 18.8 20.2 21.6 23.1 24.5 25.9 27.4 28.8 30.2 62F 16.9 18.3 19.8 21.3 22.7 24.2 25.7 27.1 28.6 30.0 31.5 64F 17.8 19.3 20.8 22.3 23.8 25.3 26.8 28.3 29.8 31.3 32.8 66F 18.8 20.3 21.9 23.4 25.0 26.5 28.0 29.6 31.1 32.6 34.1 68F 19.8 21.4 22.9 24.5 26.1 27.6 29.2 30.8 32.4 33.9 35.5 70F 20.8 22.4 24.0 25.6 27.2 28.8 30.4 32.0 33.6 35.2 36.8 72F 21.8 23.4 25.1 26.7 28.4 30.0 31.6 33.3 34.9 36.5 38.2 74F 22.8 24.5 26.2 27.8 29.5 31.2 32.9 34.5 36.2 37.9 39.5 76F 23.8 25.5 27.2 29.0 30.7 32.4 34.1 35.8 37.5 39.2 40.9 78F 24.9 26.6 28.4 30.1 31.8 33.6 35.3 37.1 38.8 40.5 42.3 80F 25.9 27.7 29.5 31.2 33.0 34.8 36.6 38.3 40.1 41.9 43.7 PRESSURE REQUIRED FOR DESIRED CARBONATION Volumes of CO2 desired Temp 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 01C 4.2 5.2 6.2 7.2 8.1 9.1 10.1 11.1 12.0 13.0 14.0 02C 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 03C 5.7 6.8 7.8 8.9 9.9 10.9 12.0 13.0 14.0 15.1 16.1 04C 6.5 7.6 8.6 9.7 10.8 11.9 12.9 14.0 15.1 16.1 17.2 05C 7.3 8.4 9.5 10.6 11.7 12.8 13.9 15.0 16.1 17.2 18.3 06C 8.1 9.2 10.3 11.5 12.6 13.7 14.9 16.0 17.1 18.2 19.4 07C 8.8 10.0 11.2 12.3 13.5 14.7 15.8 17.0 18.2 19.3 20.5 08C 9.6 10.8 12.0 13.2 14.4 15.6 16.8 18.0 19.2 20.4 21.6 09C 10.4 11.7 12.9 14.1 15.4 16.6 17.8 19.0 20.3 21.5 22.7 10C 11.3 12.5 13.8 15.0 16.3 17.6 18.8 20.1 21.3 22.6 23.8 11C 12.1 13.4 14.7 16.0 17.2 18.5 19.8 21.1 22.4 23.7 25.0 12C 12.9 14.2 15.6 16.9 18.2 19.5 20.8 22.1 23.5 24.8 26.1 13C 13.7 15.1 16.4 17.8 19.2 20.5 21.9 23.2 24.5 25.9 27.2 14C 14.6 16.0 17.4 18.7 20.1 21.5 22.9 24.3 25.6 27.0 28.4 15C 15.4 16.8 18.3 19.7 21.1 22.5 23.9 25.3 26.7 28.1 29.6 16C 16.3 17.7 19.2 20.6 22.1 23.5 25.0 26.4 27.8 29.3 30.7 17C 17.1 18.6 20.1 21.6 23.1 24.5 26.0 27.5 29.0 30.4 31.9 18C 18.0 19.5 21.0 22.6 24.1 25.6 27.1 28.6 30.1 31.6 33.1 19C 18.9 20.4 22.0 23.5 25.1 26.6 28.1 29.7 31.2 32.7 34.3 20C 19.8 21.4 22.9 24.5 26.1 27.6 29.2 30.8 32.4 33.9 35.5 21C 20.7 22.3 23.9 25.5 27.1 28.7 30.3 31.9 33.5 35.1 36.7 22C 21.6 23.2 24.9 26.5 28.1 29.8 31.4 33.0 34.6 36.3 37.9 23C 22.5 24.2 25.8 27.5 29.2 30.8 32.5 34.1 35.8 37.5 39.1 24C 23.4 25.1 26.8 28.5 30.2 31.9 33.6 35.3 37.0 38.7 40.3 25C 24.3 26.1 27.8 29.5 31.3 33.0 34.7 36.4 38.1 39.9 41.6 REFERENCE Volumes of CO2: British style beers = 2.00 - 2.40 Most other beers = 2.40 - 2.85 High-carbonation beers = 2.85 - 2.95 FORMULA If you use a spreadsheet or a programmable calculator for your brewing endeavors, this formula works very well (it was used to create the table): Pressure = F(Temperature, Volume) P = -16.6999 - 0.0101059 T + 0.00116512 T^2 + 0.173354 T V + 4.24267 V - 0.0684226 V^2