Priming Sugar Calculator
Calculate the right amount of priming sugar for bottle conditioning your homebrew. Choose from various sugar types and target carbonation levels by style.
Batch Size
Carbonation Level
Sugar Type
Corn sugar (dextrose) is most common. Table sugar works equally well. Honey and DME add subtle flavor but require more weight.
Priming Sugar
Per Bottle (12oz)
0.19 g
Target CO₂
2.40 vol
Residual CO₂
0.87 vol
CO₂ to Add
1.54 vol
Sugar Alternatives
Bottle Conditioning
Carbonation Tips
- • Colder beer at bottling = more CO₂ needed
- • Warmer conditioning temps = faster carbonation
- • Higher gravity beers may need more time
- • Test one bottle at 2 weeks before chilling batch
- • Carbonation drops are less precise but convenient
Carbonation Levels by Beer Style
Different beer styles traditionally have different carbonation levels. Use these as starting points - personal preference matters too.
British Ales
American Ales
Belgian Ales
Wheat Beers
Sugar Type Comparison
| Sugar Type | g per gal/vol | Notes |
|---|---|---|
| Corn Sugar (Dextrose) | 4.0 | Most common, clean, no flavor |
| Table Sugar (Sucrose) | 3.64 | Slightly less needed, equally clean |
| Honey | 5.2 | Adds subtle honey character |
| Dry Malt Extract | 6.45 | Adds malty flavor, traditional |
| Belgian Candi Sugar | 3.64 | Similar to table sugar, authentic for Belgians |
Frequently Asked Questions
What is priming sugar?
Priming sugar is fermentable sugar added at bottling to create carbonation. Yeast in the beer consumes the sugar, producing CO₂ that dissolves into the beer since the bottle is sealed. This is called bottle conditioning or natural carbonation.
Why does beer temperature at bottling matter?
Colder beer holds more dissolved CO₂ from fermentation (residual CO₂). This calculator accounts for residual CO₂ based on your beer temperature - warmer beer has less residual CO₂, so you need more priming sugar to reach your target carbonation level.
What's the difference between corn sugar and table sugar?
Corn sugar (dextrose) is 100% fermentable and leaves no flavor. Table sugar (sucrose) is also 100% fermentable but requires slightly less weight. Both work equally well. The taste difference is undetectable in finished beer.
How long does bottle conditioning take?
Standard ales carbonate in 2-3 weeks at 65-75°F. Lagers and high-gravity beers may take 3-4 weeks. Cold storage slows carbonation significantly. Test one bottle at 2 weeks before chilling the whole batch. Carbonation continues to improve for months.
What are CO₂ volumes?
CO₂ volumes measure carbonation level - one 'volume' means the CO₂ would occupy the same space as the beer at standard temperature and pressure. British ales are around 1.5-2.0 volumes, American beers 2.0-2.5, Belgian ales 2.5-3.5, and wheat beers up to 4.5 volumes.
How do I avoid bottle bombs?
Ensure fermentation is complete (stable gravity readings 3 days apart). Don't over-prime - use a calculator like this one. Use bottles rated for carbonation. Avoid high carbonation levels (>3.5 vol) unless using Belgian or champagne bottles. Store at proper temperature.
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