Home Brew Batch ABV & Carbonation Calculator
Enter your original and final gravity readings along with batch size and beer style carbonation target to get your estimated ABV and priming sugar dose.
Estimated ABV
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Estimated ABV (%)—
Residual CO2 in Beer (volumes)—
Priming Sugar Needed (grams)—
Priming Sugar Needed (oz)—
About this calculator
Estimate the alcohol by volume of your homebrew from original and final gravity readings, plus the priming sugar needed to hit your target carbonation level.
Frequently Asked Questions
How accurate is the ABV formula?
The 131.25 multiplier formula is a widely used homebrew approximation and is generally accurate within about 0.2-0.3% for typical beer gravities.
Why does temperature matter for carbonation?
Beer naturally holds dissolved CO2 depending on temperature at packaging; warmer beer holds less residual CO2, so you need to add more priming sugar to reach your target.
What sugar type does this assume?
The calculation assumes standard dextrose (corn sugar) priming sugar dosing rates.