Quick Efficiency Caluculation question

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meatwad

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When I'm dividing Max Gravity Points available by Volume in Gallons, am I using the collected preboil volume? Or the post boil volume?

Thanks !
 
Depends when you took your gravity reading...

Preboil gravity reading x preboil gallons / Max Gravity Points ~ mash/lauter efficiency
Postboil gravity reading x postboil gallons / Max Gravity Points ~ brewhouse efficiency (though actually should be cooled volume & gravity into fermenter)
 

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