![]() ![]() ![]() And those figures I used are from the steeping column not mashed column. From Palmers list, he states black patent will add 21ppg. I agree that the chocolate wheat and flaked oats wont add points. You can have 1% BH efficiency or 100% BH efficiency, that wouldnt change extract gravity. Use the PPG of the extract, the amount of extract used and the volume of water that extract was put into. Yeast will not affect OG at all so that should be taken out of any equation.īH efficiency should not be used when calculating extract gravity. Beersmith add grain full#But what about the 2 gallons left behind? Calculating it this way is basically saying the leftover 2 gallons is just water with gravity of 1.000 even though the 6lbs of DME was added to the full 10 gallons. So 6 pounds of DME at 43PPG into 8 gallons of water is 1.033. The way BS calculates it is by using the into the fermentor volume, which in this example is 8 gallons. The 8 gallons going into the fermentor is 1.026 and the 2 gallons left in the kettle is 1.026. So 6 pounds of DME at 43PPG into 10 gallons of water is 1.026 gravity. I believe gravity should be calculated using post boil volume. The reason it changes is because it uses the volume that is going into the fermentor to calculate gravity.ġ0 gallons post boil with 8 gallons going into the fermentor. ![]() If instead you leave 4 gallons and transfer 6 gallons, the gravity wont change. If you have 10 gallons in your kettle and transfer 8 into a fermentor and leave 2 gallons in the kettle, the gravity of both of those volumes are equal. ![]() Once you stop the boil, gravity of the wort will never change. Extract gravity is calculated by taking the PPG of the extract (43ppg for DME), multiplying by the amount (6lbs) and dividing that by the volume of water used. No I dont think gravity should be calculated using into fermentor volume. I should be getting the same gravity calculation. 43PPG, 6lbs DME and 5.5 gallons gets 1.047. BS is using into the fermentor volume now. Then all I changed was extract to partial mash and the gravity changed to 1.047. 43PPG, 6lbs DME and 6.5 gallons post boil to get 1.040. When using extract, BS calculated the gravity correctly using post boil volume. I used just 6lbs of DME and changed from extract to partial mash. If I use 6.5 gallons, like I think I should, I get a little over 5 points which is still higher than the 2 BS calculates.Įdit: Added screenshots. alt-yields), I get a little over 6 points when using 5.5 gallons as BS would use. BS is only giving a total of 2 points for all those grains (and as above, is using 5.5 gallons to calculate it). I'm using 2oz black patent, 6oz chocolate wheat, 8oz carafoam, 8oz C10, 8oz flaked oats and 1lb C60. Shouldn't the volume used be post boil (6.5 gallons), since at that point the gravity of the wort won't change? Whether you put all 6.5 gallons into the fermentor or leave 3 gallons in the kettle, that wort will have the same gravity.Īlso, I'm using steeping grains which I know adds a little sugar. So BS calculated it as 43 points x 1lb DME / 5.5 gallons to get about 1.008. For example, 1lb of DME has 43 points per pound per gallon. BeerSmith calculates OG by using the into fermentor amount. I'm using BeerSmith and it doesn't seem like he calculates it correctly.įor volume, my post-boil will be 6.5 gallons and wort into fermentor will be 5.5 gallons. Beersmith add grain how to#Trying to remember how to calculate gravity for extract. Going to be doing a few extract and steeping grain batches to show some friends. ![]()
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