Recipe Calculators

Here we're going to talk a little bit about the 2 calculators that come with the recipe currently.

Bottle Carbonation

Bottle Carb Calculator

In the standalone carbonation calculator, you have to choose a style to display the min-max carbonation levels. You'll also have to choose the volume of beer.

If your recipe already has volumes and a style selected, the recipe bottle carbonation calculator will already include these fields. All you have to do is choose the type of sugar you wish to carbonate with, and it'll show you how much you need for the min or max displayed volume of CO2. If you prefer to dose your bottles with sugar, it'll also show you how much you need for each bottle.

If you want to put a custom CO2 volume, just enter it in either the min or max field.


  • [ ] add the ability to save the volumes of CO2 to the recipe, so you remember what you did.
  • [ ] make sure the calculated fields are there when the calculator opens

Keg Carbonation

This calculator does 2 things:

  1. Gives you force carbing PSI levels (depending on your line ID and tap height)
  2. Gives you bulk sugar dosing levels (essentially the same as the bottle carbonation calculator)

Keg Carb Calculator

Keg carbonation is a bit more complex than bottle carbonation. You'll need to input your line ID and tap height to get the right force carbonation PSI figures. This currently defaults to some standard settings.

Line Type

The most important thing to know about your line type is the ID (inner diameter) and the OD (outer diameter). Here's a handy diagram to help you figure this out:

Inner and Outer Diameter

Beverage lines come in all shapes and sizes. The currentl list is imperial-centric, but here's the list of what the site currently supports:

  • 3/16 I.D. plastic beer line
  • 1/4 I.D. plastic beer line
  • 5/16 I.D. plastic beer line
  • 3/8 I.D. plastic beer line
  • 1/2 I.D. plastic beer line
  • 1/4 O.D. Stainless Beverage Tubing
  • 5/16 O.D. Stainless Beverage Tubing
  • 3/8 O.D. Stainless Beverage Tubing


  • [ ] Update these sizes with metric figures
  • [ ] Add any more metric-centric line sizes to the calculator.
  • [ ] Allow custom line sizes

Tap Height

Tap height is simple the vertical distance between the height of the tap to the centre of your keg.

You could simply measure the distance between the tap and the bottom of the keg, then the distance between the top of the keg, and divide by two to get this number.

See Also

James Torr 18 Jun 22