How much yeast to use? Fermentis US-05

[ILoveBeer89]

Hi all,

I wondered if anyone who has used the above yeast can give me an idea on the quantity required. I am brewing a fairly high SG IPA (somewhere in the region of 1.065-1.080) batch size 15-20L.

Brewers friend recipe calculator suggests 27g of this yeast based on a 10 billion cells/g density. This is rated at > 6 billion cells/g (which, if i'm calculating correctly, based on the lower estimate of 6 billion cells/g, I would actually need 45g, or 4 packets!!).

I have also seen posts which suggest that 1 packet of this yeast would be ample for a batch this size up to an SG of 1.085?

Any advice would be greatly appreciated as I don't want to under of over yeast!

In case this is needed, I am trying a very basic recipe out (I'm still a newbie);

2-2.5 kg pre-hopped light DME
0.5-1.0 kg dextrose
Fermentis US-05 yeast ? g
50-75g Cascade (dry hop)
50-75g Southern Star (dry hop)

Thanks in advance!
Gary

 

[Bunglebrewsbeer]

No idea. Lob to packets in. Should do the trick.


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[Covrich]

I haven't used one for a gravity that high before.. but up to 1065 easily used one packet.. I would have thought 2 at the most.. re-hydrate it before pitching and you should be fine..

 

[MyQul]

As others have said two packets is enough. I put the figures for 23L of 1.080 wort in to MrMaly yeast calc and it came up with 18g of dried yeast

http://www.mrmalty.com/calc/calc.html

 

[ILoveBeer89]

Thanks for the help guys!