Bottle Priming Sugar Calculator

Calculate exact priming sugar weights based on style CO2 volumes, batch volume, and fermentation temperature.

Bottle Priming & Carbonation

Accurate sugar weights accounting for residual dissolved CO2 from fermentation temperature.

Quick Style Presets:

Beer Volume to Bottle

Gal

Finished liquid volume

Highest Ferment Temp

°F

Determines residual CO2

Target Volumes of CO2

vols

Residual CO2: 0.86 vols

Required Priming Sugar (Choose One):

Corn Sugar (Dextrose)128g(4.52 oz)

Table Sugar (Sucrose)116g(4.09 oz)

Dry Malt Ext. (DME)166g(5.86 oz)

Pure Honey160g(5.64 oz)

Mathematical Formula & Derivation

Henry's Law Residual CO2 & Priming Mass Equation

CO_{2\text{ dissolved}} = 3.0378 - 0.050062 T + 0.00026555 T^2

Beer contains residual dissolved carbon dioxide from primary fermentation inversely proportional to its highest fermentation temperature. The sugar required is only the delta between target volumes and residual dissolved gas.

How to Use This Tool

1Enter exact volume of beer transferred to bottling bucket (e.g. 5.0 gallons).
2Enter the highest temperature the beer reached post-fermentation (e.g. 68°F).
3Select your beer style or enter custom target volumes of CO2 (e.g. 2.4 vols for American Ale).
4Weigh the calculated sugar in grams on a digital scale, boil in 1 cup water, and mix gently into the bottling bucket.

Tested Hardware Recommendation

Recommended Equipment for this Tool

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Frequently Asked Questions

Why should I enter the highest post-fermentation temperature?

Because gas solubility follows Henry's Law: once beer warms up, dissolved CO2 escapes through the airlock. Even if you subsequently cold-crash to 35°F, CO2 does not re-enter unless pressurized. Always use the highest temperature reached after fermentation ended.

Can I use regular table sugar (sucrose) instead of corn sugar (dextrose)?

Yes! Sucrose works wonderfully and is 100% fermentable. Because corn sugar contains ~9% water of crystallization (dextrose monohydrate), you need ~9% less table sugar by weight than corn sugar for the identical carbonation level.