> Just made my first batch of wine. Can somebody please offer some advice.
If
> I know the starting gravity (1080) and I know the final gravity (992) what
> is the equation to work out the percentage alcohol. I read somewhere that
> you divide by a certain figure. Can anyone help. I am making Beaverdale
Red
> Rioja.

I believe the "certain figure" you are looking for is 0.736

So 1.08 - 0.992 = 0.088 / .736 = .1196 or 11.96% alcohol.
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Robert J. Romano, CPA