# 🍺 Top-down Brew: Keg Pressure Gauge Calculator

Purpose: To determine the gauge pressure needed for the carbonation of kegged beer

Temperature
Volumes of CO2

Temperature units:

Fahrenheit Celsius

Results: *** Waiting for results ***

## Notes

The formula for this calculation is from Methods of Modern Homebrewing, pages 210-212. The subscripts in the published formula should really be squared values. The corrected formula is:

GP = -16.7 - .0101T + .00117T2 + .173TC + 4.24C - .0684C2

- GP = Gauge pressure in pounds per square inch (PSI)
- T = Temperature in degrees Fahrenheit
- C = Carbon dioxide concentration in volumes of CO2

Basic carbonation reference for volumes of CO2:

- Low: 2.0 to 2.4 - British beer styles
- Medium: 2.5 to 2.7 - Most beers
- High: 2.8 to 3.0 - American, wheat beers
- Over 3.0 - Some Belgian styles, wheat beers