Draft carbonation guide

Keg Carbonation Pressure Guide

Set regulator pressure from beer temperature and carbonation target instead of guessing.

Match pressure to beer temperature and CO2 target

Keg carbonation depends on the beer's actual temperature and the level of carbonation you want in the glass. This guide helps you use the keg carbonation calculator for set-and-wait force carbonation.

1. Start with the beer temperature

Carbonation pressure is tied to the liquid temperature, not just the room or fridge setting. Let the keg settle cold before using the calculator when possible.

  • Measure or estimate the keg temperature
  • Avoid using room temperature for chilled beer
  • Recheck pressure after major temperature changes

2. Pick a CO2 volume for the pour

A moderate ale might sit near the middle of the range, while spritzy styles need more carbonation. Choose the target first, then let the calculator translate that into PSI.

  • Use style range as a starting point
  • Lower carbonation for softer cask-like pours
  • Higher carbonation for wheat, saison, or sparkling styles

3. Set pressure and give it time

The calculator is for equilibrium carbonation. Set the regulator, keep the keg cold, and allow time for the beer to absorb CO2 before judging the result.

  • Use stable serving temperature
  • Keep gas connected at the calculated pressure
  • Adjust serving line balance if pours foam
Worked example

Example keg pressure workflow

For a pale ale in a cold keg, choose a target around 2.4 volumes of CO2, enter the beer temperature, then use the calculated PSI as the regulator setting while the beer reaches equilibrium.

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Frequently asked questions

Should I enter fridge temperature or beer temperature?

Use beer or keg temperature as closely as possible. Air temperature can move faster than the liquid inside the keg.

Is this for burst carbonation?

No. This guide and calculator are intended for equilibrium carbonation, where pressure and temperature are held steady.

Why does colder beer need less pressure?

Colder beer holds more dissolved CO2, so it needs less regulator pressure to reach the same carbonation volume.

Can I use style carbonation targets?

Yes. Style ranges are useful starting points, especially when you are not sure what CO2 volume to choose.

Set your keg carbonation pressure

Use beer temperature and target CO2 volume to estimate a practical regulator setting.

Open keg calculator