Excel gravity calc.

[Medevac_Chief]

hey everyone,
i have been searching high and low for a gravity excel calculator. ive seen it before just dont remember the website. if anyone could please point me in the right direction that would be AWESOME

 

[ETCS]

I've used this site before, works pretty well

http://www.brewersfriend.com/brewhouse-efficiency/

 

[JonK331]

why don't you just make one? (OG-FG)*131