DME to LME nitpicking

[oneeyedziggy]

so just to re-hash, Searching around I've found a pretty wide range of conflicting conversions factors for dme to lme and back from 1.1 to 1.25, and a 15% swing seems pretty big to glaze over

the 1 lb grain = .75 lb LME = .6 lb DME equation would suggest DME to LME factor is 1.25

the "LME is 20% water" quote would suggest DME to LME as 1.2

while some have used DME * 1.1 = LME and LME * 0.8 = DME, which doesn't balance out because if you convert a pound of DME to LME and back that way you end up with 88% of your original weight.

similarly I've seen DME to LME = DME/0.8 (which is to say LME * 1.25 = DME) and LME * 0.8 = DME which is similar logic but actually balances out and matches the (1 lb grain = .75 lb LME = .6 lb DME equation).

so DME to LME 1.10, 1.2, 1.25? (surprisingly I haven't seen anyone saying 1.15... the middle value)

 

[kevokie]

I use 1 lb grain = 0.70 lb LME = 0.60 lb DME.

 

[william_shakes_beer]

Why not try an experiment and report back.

Mash 1 lb grain, mix 1 lb LME and 1 LB dme each in 3 separate 1 gallon boils, measure the gravity and advise.

I suspect there is variance among the malts and mash effeciencies, so the conversions are most likely approximate.

 

[oneeyedziggy]

I might have to do that, I suppose that's just the perfectionist in me, and worst case (or wort case?) your beer comes out a little to thin or a little too viscous. I'd rather err on the side of too much and water it back down to the desired gravity.