I recently started my first BIAB all-grain brew, but unfortunately my hydrometer broke before I could get an OG reading. I was targeting around a 1.065. Just around 24 hours later I took a reading and got a 1.030.

I also accidentally overpitched the yeast somewhat significantly (~1/3 packet of Safale US-05 for a 1 gallon brew).

I understand there's really no way to know for sure what the OG was, but I'm interested in knowing by roughly how much I undershot the mark.

  • 1
    If you add a list of the fermentables, we could make an estimate of the OG. I'm don't know of a method to estimate based on the 24-hour gravity.
    – Kingsley
    Commented Aug 22, 2020 at 20:32
  • Just a FYI that is not an over-pitch of yeast. You could pitch 5 packs of safale 05 in a 1 gallon brew and it would still not be near overpitching :)
    – rob
    Commented Aug 25, 2020 at 14:07

1 Answer 1


The one blunt but true answer: It's too late. There's no accurate way to know what the OG was.

  • True, you can only estimated it based on the ingredients, which is not always accurate either.
    – Philippe
    Commented Aug 25, 2020 at 18:00

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.