# Questions on my hydrometer readings

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##### Well-Known Member
I've taken two readings in the last 3 days and they were only different by .002, the original gravity was about 1.082 and the reading today was 1.022, its been a week and a half since its been in the primary.

im confused how to calculate the alcohol % with these numbers even after reading the How to Brew book. it is an partial mash/extract fat tire clone. it tastes pretty good, especially for not being cold or carbonated! I actually can't believe it... can't wait till its bottled

Here's a simple online calculator.

How close are you to the recipe's stated FG? Which yeast did you use, as that might also give you an idea of how much attenuation you should expect?

(OG - FG) x 1.05/.79 = ABV

thanks a lot that calculator is sweet

Hmmmm, 1.082 seems really high for a Fat Tire Clone. I'm wondering if your wort was properly mixed when you took the OG reading. The only reason I mention it is that it may artificially increase what you think the ABV is.

Sea said:
(OG - FG) x 1.05/.79 = ABV
Huh?

The instructions with my AHB Fat Tire extract says (OG-FG)131=ABV%

Using the 1.05 OG and 1.012 FG that my kit says is average, your method results in 5.05 %abv, and AHB's comes out to 4.978 %abv.

Is your equation a more accurate way?

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