ABV from OG FG Calculator
Estimate beer or cider ABV from gravity readings.
Calculate abv from og fg calculator from clear inputs
ABV from OG FG Calculator gives a focused worksheet for cooking & kitchen questions where a quick deterministic estimate is more useful than a spreadsheet. The abv from og fg calculator fields mirror the variables in its formula, and the output separates the main result from supporting values so you can sanity-check this calculation before reusing it.
Original gravity 1.055 and final gravity 1.012 gives about 5.64375 percent ABV.
Keep the estimate private in your browser
For ABV from OG FG Calculator, every calculation runs in your browser with no upload, account, cookie, live lookup, or server-side storage. The abv from og fg calculator result is best treated as a planning number because the real-world constraints behind this estimate can change the answer. Adjust the abv from og fg calculator assumptions and confirm important decisions against the relevant source of truth for that exact situation.
Frequently Asked Questions
What formula does the ABV calculator use?
The common homebrew formula ABV = (OG − FG) × 131.25. An original gravity of 1.055 finishing at 1.012 gives about 5.64% ABV.
Should I enter gravity as 1.050 or as 50 points?
Enter full specific gravity readings like 1.050 and 1.010. Entering points (50 and 10) would multiply the difference by 131.25 and give a nonsense result.
Is the simple formula accurate for strong beers?
It drifts low above roughly 8% ABV, where the alternate formula (76.08 × (OG − FG) / (1.775 − OG)) × (FG / 0.794) tracks better. For typical beers and ciders the simple version is within a few tenths of a percent.
Related tools
Browse the full set of free, private, in-browser tools.