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4 comments:
It's a bit rough and ready but I make it that each fermented degree plato will give you 0.4128% ABW. So divide the ABW by 0.4128 and add the FG to get OG.
This is based on the assumption that degrees plato = gravity degrees X 4, and ABV = ABV X 0.8, and it's based on a 'f' factor of 0.129 suitable for an ABV of 3.3 to 4.6. http://www.hmrc.gov.uk/manuals/beerpolmanual/BEERPOL12030.htm
http://www.probrewer.com/resources/tools/beerspecs.php
Maybe this?
Gary
http://realbeer.com/hops/kcalc_js.html
Ron, here it is again in another form in case the link above didn't work.
Gary
Its definitely not that simple. Depending on the extract of the beer the OG's will definitely change. An OG can be much greater than on expects just simply looking at FG and ABV. Its a sliding scale and not direct.
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