Homebrew Gravity Calculator
Calculate ABV, apparent attenuation, and calories from original and final gravity readings.
How to Use the Homebrew Gravity Calculator
- Take an original gravity reading before pitching yeast.
- Take a final gravity reading when fermentation is complete.
- Enter both values (e.g., 1.050 and 1.010).
- Click Calculate to see ABV, attenuation, and calories.
使用例
- •Calculating alcohol content of homebrewed beer.
- •Checking fermentation completion.
- •Estimating caloric content of your brew.
- •Comparing attenuation across yeast strains.
計算式
ABV = (OG − FG) × 131.25. Apparent Attenuation = (OG − FG) / (OG − 1) × 100%.
よくある質問
What is original gravity (OG)?
OG is the density of the wort before fermentation, measured with a hydrometer. Water is 1.000; a typical beer wort is 1.040–1.060.
What is final gravity (FG)?
FG is the density after fermentation is complete. Lower FG means more sugar was fermented into alcohol.
What is apparent attenuation?
It's the percentage of fermentable sugars consumed by yeast. Higher attenuation means a drier, more alcoholic beer.