Initial gravity of wort (prior to fermentation).

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3
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3answers
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Different OG than predicted

Just brewed a batch, and my OG reading is significantly different (1.051 as opposed to 1.070) than what Beercalculus.com predicted based on my recipe. Is there any possible reason for this that ...
4
votes
2answers
1k views

What causes Original Gravity to be lower than it should be?

I am an extract brewer and every brew I have done the OG was lower than the intended OG, (my OG is always lower than the recipe's OG). For example I brewed the stout recipe below from beertools.com ...