Ok, I know how important it is to keep careful measure of specific gravity before, during, and after fermentation to know what approximate levels of alcohol by volume you are producing. Keeping track of gravity measurements in this fashion is, as far as I know, the most accurate and reliable way to ascertain your ABV short of paying a lot to have a laboratory analyze your alcohol levels.

However, I'm kinda pissed off now that I have found several specific gravity/ABV tables quoting some markedly different values.

My Strawberry wine just gave me a gravity measurement of 1.080

A book I have relates that to 11.2% ABV
When I google searched for another table I could keep on my computer, I found a similar table which told me 1.080 would give 10.2% ABV, and I found yet another table showing it should be 12.8% ABV. This kind of made me mad as I've prided myself on measuring my hydrometer all scientific-like to four significant digits, and now I don't know what to believe! I didn't know there was such spread amongst the data with regard to this. Now I'm left with ABV somewhere between 10 and 12% As accurate as I try to be with my measurements, I really wish these tables showed more precise figures.

I agree there is quite a difference depending on who made up the chart.
There is a formula for alcohol. Of coarse that depends on where the fermentation stops.

Starting SG minus Ending SG divided by .00736 equals the percentage of alcohol.

When I start my wine I use a refractometer. I still suspect when using fruit, blended, chopped or cut up, the sugar actually in the fruit is not accurately measured until it starts breaking down. I seem to have a better starting point every time with the refractometer. I then use the hydrometer as it ferments because when it reaches a lower point my refractometer doesn't seem to be as accurate. My refractometer is in the $50 cost range.

I suppose if you squeeze some of the fruit juice on the refractometer, then factor in everything else it would be more accurate.

I can't understand why none of my resources have shown me that formula yet, but that's what I'll use from now on. I would almost always prefer to use a formula rather than a chart. Thanks a lot for showing me that!

Hope the formula works out for you.

I just noticed you are in San Jose, CA. Beautiful area. I lived in Torrance, CA for over 40 years before moving to Wyoming 10 years ago. I can remember when there were no houses between Long Beach and San Diego.