Priming Sugar Calculator
Updated – 2026
Priming Sugar Calculator: Bottle Carbonation Tool
Work out exactly how much priming sugar to add at bottling time for your beer, mead, cider, or wine. Enter your batch size, the highest temperature your beer reached after fermentation, and your target carbonation level — the calculator accounts for the CO₂ already dissolved in your beer so you don’t over- or under-carbonate. In a hurry? Jump straight to the priming sugar per bottle chart below.
Priming sugar needed
Residual CO₂
CO₂ to add
Not sure your fermentation is actually finished? Confirm with two or three stable hydrometer readings using the ABV Calculator before you bottle — priming sugar assumes fermentation is fully done.
How to Use This Priming Sugar Calculator
- Enter your batch volume — the total amount of beer, mead, or cider going into bottles (after losses to trub and sediment).
- Enter the highest temperature your batch reached during or after fermentation — not today’s fridge temperature. Warmer beer holds less CO₂, so it needs more priming sugar to reach the same target.
- Pick your target carbonation level — choose a style from the dropdown to auto-fill a sensible target, or enter your own volumes of CO₂ directly.
- Choose your priming sugar — corn sugar (dextrose) is the standard reference; other sugars are scaled relative to it based on their fermentable content.
- Click Calculate to see exactly how much sugar to weigh out.
If you cold-crashed your batch or ran a diacetyl rest, use your best judgment on which temperature best represents the CO₂ already trapped in the beer — a long cold crash can re-absorb some CO₂ from the headspace, complicating the estimate slightly.
Understanding Your Results
Why Residual CO₂ Matters
Your beer isn’t flat straight out of the fermenter — fermentation itself produces CO₂, some of which stays dissolved in the liquid. Colder beer holds more dissolved CO₂; warmer beer holds less. This calculator estimates that residual amount from your fermentation temperature, then works out only the additional sugar needed to reach your target — not the full amount from zero.
Priming Sugar Formula
Once the CO₂ shortfall is known, the calculator converts it into a weight of fermentable sugar using the standard gravity-based priming formula, then scales the result for whichever sugar you selected:
Why Different Sugars Need Different Amounts
Corn sugar (dextrose) is close to 100% fermentable and is the standard reference point. Table sugar (sucrose) is slightly more concentrated by weight, so you need a bit less of it. Dry malt extract, honey, and syrups contain non-fermentable solids and water, so you need proportionally more to hit the same CO₂ target.
Carbonation Targets by Style
These are typical starting ranges — personal preference varies, and you can always enter your own target directly in the calculator above.
| Style | Typical CO₂ (volumes) | Character |
|---|---|---|
| British ales, bitters, milds | 1.5 – 2.0 | Low carbonation, soft mouthfeel |
| Porters, stouts | 1.7 – 2.3 | Gentle carbonation, creamy body |
| American ales, pale ales, IPAs | 2.2 – 2.7 | Moderate, lively carbonation |
| Lagers, pilsners | 2.2 – 2.7 | Crisp, refreshing carbonation |
| Belgian ales, tripels, dubbels | 2.5 – 3.5 | High, champagne-like effervescence |
| German wheat beers | 3.3 – 4.5 | Very high, foamy carbonation |
| Hard cider | 2.5 – 3.5 | Crisp to sparkling, style-dependent |
| Sparkling mead | 2.0 – 2.8 | Light effervescence |
Priming Sugar Per Bottle (Quick Reference Chart)
Bottling straight from a bucket rather than dosing the whole batch at once? This chart shows corn sugar (dextrose) in grams per individual bottle, at a typical 68°F (20°C) fermentation temperature. If your beer finished at a different temperature, or you’re using a different sugar, use the full calculator above instead — this chart is a starting-point reference only.
| Bottle size | 2.2 vol (low) | 2.5 vol (medium) | 3.0 vol (high) |
|---|---|---|---|
| 12 oz (355 ml) | 1.9 g | 2.3 g | 3.0 g |
| 16 oz (473 ml) | 2.5 g | 3.1 g | 4.1 g |
| 500 ml | 2.7 g | 3.3 g | 4.3 g |
| 22 oz (650 ml) | 3.5 g | 4.3 g | 5.6 g |
| 750 ml | 4.0 g | 4.9 g | 6.4 g |
| 1 litre | 5.4 g | 6.6 g | 8.6 g |
Using table sugar instead? Use roughly 9% less by weight. Using honey, DME, or syrup? Use 20–36% more — see the sugar type notes below. For wine or champagne bottles, see the FAQ on sparkling wine priming further down this page.
Avoiding Overcarbonation and Bottle Bombs
Adding too much priming sugar is the most common cause of “bottle bombs” — bottles that become dangerously overpressurized and can shatter. A few precautions make this essentially a non-issue:
- Weigh your priming sugar rather than measuring by volume with a cup or scoop — trapped air pockets make volume measurements unreliable.
- Confirm fermentation is fully complete before bottling — two or three stable hydrometer readings 24–48 hours apart. Bottling a beer that’s still fermenting adds priming sugar on top of unfinished fermentation sugars, a common cause of overcarbonation.
- Use pressure-rated bottles designed for carbonated beverages, especially for higher-carbonation styles like Belgian ales or German wheat beers.
- Don’t exceed roughly 4.5 volumes of CO₂ in standard glass beer bottles — very high targets are usually reserved for kegging and force carbonation instead, or require bottles specifically rated for higher pressure (like Champagne bottles).
Storing your bottles somewhere with stable temperature also helps — a warm spike after bottling can push carbonation higher than intended as the residual and added CO₂ both re-equilibrate.
Frequently Asked Questions About Priming Sugar
How much priming sugar do I need for 5 gallons?
For a typical 5-gallon batch at 68°F targeting 2.4 volumes of CO₂, you’ll need roughly 4–4.5 oz (about 115–130 g) of corn sugar. The exact amount depends on your beer’s temperature and target carbonation level — use the calculator above for a figure specific to your batch.
Can I use honey instead of corn sugar to prime?
Yes — honey works well for priming, but because it’s roughly 80% fermentable sugar with the rest being water and non-fermentable content, you need about 20–25% more of it by weight than corn sugar to hit the same carbonation target. Select “Honey” in the calculator above for an adjusted amount.
What happens if I add too much priming sugar?
Overcarbonation, and in severe cases, “bottle bombs” — bottles that build enough internal pressure to burst. Symptoms include gushing when opened, swollen bottle caps, or excessive foam. Always weigh priming sugar rather than measuring by volume, and confirm fermentation is fully finished before bottling.
Do I need priming sugar if I’m kegging instead of bottling?
No — kegged beer is typically force-carbonated using CO₂ under pressure rather than priming sugar, since a keg doesn’t need the yeast to generate carbonation naturally the way a sealed bottle does. Priming sugar is specifically for bottle conditioning.
What temperature should I use for the calculator?
Use the highest temperature your beer reached during or after active fermentation — not today’s fridge or serving temperature. This is because dissolved CO₂ is set largely by the warmest point the beer experienced; a later cold crash doesn’t reduce it much on the timescale of typical brewing schedules.
Is table sugar okay to use for priming, or do I need corn sugar specifically?
Table sugar (sucrose) works fine for priming and is used interchangeably with corn sugar by many brewers. Because it’s slightly more concentrated, you need marginally less of it by weight — about 9% less than the equivalent corn sugar amount, which the calculator adjusts for automatically.
How long does it take for bottles to carbonate after priming?
Most ales reach full carbonation in about 2–3 weeks at room temperature. Higher-gravity beers, lagers, and styles with a lot of priming sugar (like Belgian ales) can take 4–6 weeks for the yeast to fully process the added sugar and build pressure.
How much priming sugar do I need per 500 ml bottle?
At a typical 68°F fermentation temperature, a 500 ml bottle needs roughly 2.7 g of corn sugar for low carbonation, 3.3 g for medium (about 2.5 volumes), or 4.3 g for high carbonation. See the full per-bottle chart above for other sizes, or use the calculator for your exact temperature and target.
Is there a priming sugar calculator for kegs?
This calculator is built for bottle conditioning, not kegging. Kegged beer is almost always force-carbonated with a CO₂ tank and regulator instead of priming sugar — for that, use the Keg Carbonation Calculator, which works out the correct regulator PSI for your keg’s temperature and target carbonation. Priming sugar in a keg is possible (sometimes called “krausening”) but is far less common and harder to control than force carbonation.
Can I use a priming sugar calculator for wine or champagne?
The same CO₂ math applies, but sparkling wine and champagne need much higher carbonation (often 5–6+ volumes) and specifically rated pressure bottles — standard beer bottles and caps aren’t safe at that pressure. If you’re making a lightly sparkling wine at beer-like carbonation levels, this calculator’s underlying formula works, but for true champagne-style sparkling wine, use a dedicated sparkling-wine dosage method and proper Champagne bottles, cages, and corks rated for the pressure involved.