Priming Sugar Calculator for Bottling Beer
Free priming sugar calculator for bottling beer: batch size, temp, and CO2 target in, grams out. A 5-gallon ale at 2.5 volumes needs ~124 g corn sugar.
Enter your batch size, the warmest temperature your beer reached after fermentation, a target carbonation level, and a sugar type — the calculator above returns the exact priming dose in grams and ounces. For the most common case, a 5-gallon American ale at 68°F targeting 2.5 volumes of CO2, the answer is about 124 g (4.4 oz) of corn sugar or 113 g (4.0 oz) of table sugar. The math matters because beer isn’t flat at bottling: it holds residual CO2 from fermentation — 0.86 volumes at 68°F — and priming sugar only needs to close the gap to your target. That’s why the one-size 4-oz kit rule overcarbonates a British bitter and leaves a hefeweizen lifeless. Homebrewing is federally legal in the US, up to 100 gallons per adult per year (200 per household), and carbonation is the last variable between a decent batch and a great pour.
How much priming sugar for 5 gallons of beer?
About 124 g (4.4 oz) of corn sugar carbonates 5 gallons of typical American ale to 2.5 volumes of CO2, assuming the beer sat at 68°F after fermentation. Use 113 g (4.0 oz) if priming with table sugar. Style changes the number: an English bitter at 1.8 volumes needs only about 71 g, while a German hefeweizen at 3.8 volumes needs roughly 223 g.
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Priming Sugar Calculator
Key Information
| Parameter | Details |
|---|---|
| Corn sugar for 5 gal ale at 2.5 volumes (beer at 68°F) | 124 g (4.4 oz) |
| Residual CO2 in beer at 68°F | 0.86 volumes |
| Table sugar dose vs corn sugar | 0.91× by weight |
| New 12 oz bottle pressure rating | ~4.0 volumes (≈52 psi at 68°F) |
Frequently Asked Questions
How much priming sugar for 5 gallons of beer?
About 124 g (4.4 oz) of corn sugar carbonates 5 gallons of typical American ale to 2.5 volumes of CO2, assuming the beer sat at 68°F after fermentation. Use 113 g (4.0 oz) if priming with table sugar. Style changes the number: an English bitter at 1.8 volumes needs only about 71 g, while a German hefeweizen at 3.8 volumes needs roughly 223 g.
What temperature do I enter in a priming sugar calculator?
Enter the warmest temperature your beer reached after fermentation finished — not your cold-crash or bottling temperature. Dissolved CO2 escapes as beer warms and doesn’t return when it cools in an unpressurized fermenter, so the warmest post-fermentation reading sets the true residual carbonation. Entering 38°F for a cold-crashed ale that peaked at 68°F overstates residual CO2 by about 0.66 volumes and underdoses a 5-gallon batch by roughly 50 g.
Can I use table sugar instead of corn sugar for priming?
Yes — table sugar (sucrose) works identically, and you need about 9 percent less by weight, so multiply any corn sugar dose by 0.91. Both ferment completely and leave no flavor at priming quantities of 100–225 g per 5 gallons. The calculator above handles the conversion when you select your sugar type. Avoid substituting by volume: a cup of dextrose and a cup of sucrose weigh different amounts, which is how batches end up over- or undercarbonated.
Are these calculators free to use?
Yes, all calculators on CalcCorp are completely free — no registration, no login, no hidden charges. Results are calculated instantly in your browser and we do not store any of your data.
How accurate are these calculations?
Our calculators use standard financial formulas updated with the latest tax rates, interest rates, and government policies for 2026. Results are accurate for planning purposes but should be verified with a professional for final decisions.
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Last updated: March 2026