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Smok1

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Im making a blueberry wine as close to our favorite commercial blueberry wine as possible. Just cant wrap my head over the backsweetening conversion. I want my final product to be 15-18 grams per liter of sugar. Can anyone tell me what my sg should be, finished sg was 0.990-0.992 sg. Its a 6 gallon batch.
 

BernardSmith

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Six gallons is equivalent to 22.7 liters, so multiply 22.7 by 15 or 18. If 15g/L then 22.7 * 15 = 340.5 grams of sugar for 6 gallons ; if 18 g/L then 408.6 grams of sugar for the 6 gallons.Your quantity of sugar is then between those two figures... Or are you asking a different question?
 

Smok1

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Six gallons is equivalent to 22.7 liters, so multiply 22.7 by 15 or 18. If 15g/L then 22.7 * 15 = 340.5 grams of sugar for 6 gallons ; if 18 g/L then 408.6 grams of sugar for the 6 gallons.Your quantity of sugar is then between those two figures... Or are you asking a different question?
Nope thats it thanks
 

Smok1

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Six gallons is equivalent to 22.7 liters, so multiply 22.7 by 15 or 18. If 15g/L then 22.7 * 15 = 340.5 grams of sugar for 6 gallons ; if 18 g/L then 408.6 grams of sugar for the 6 gallons.Your quantity of sugar is then between those two figures... Or are you asking a different question?
Thatll work, i was actually to try to find what my sg would be at if my sugar ls were at 15g/l
 

Scooter68

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Backsweetening by the numbers is really no guarantee you'll get what you want other than a number.

Sweeten to taste - period.
 

BernardSmith

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I strongly agree with Scooter68 - sweetness is a perception and this perception will depend on the ABV, on the pH , the TA, tannin levels, and the flavor richness of the wine. okay - so technically, 1 lb of sugar added to 1 gallon of water will raise the gravity of the water by 40 points. One pound = 453.6 g. So 450 g (approximately) will raise the gravity of 1 gallon by 40 points, and so 15 grams being 1/30 (approx of a 450 g) will raise the gravity of 1 gallon by 1/30 of 40 or 1.33 points but you are talking about 15 g /l and so there are 3.78 l in a gallon so you may want to multiply the 1.33 by 3.78 (assuming you will be adding 15 g to each liter) and so the result will be an increase of about 5 points. Bottom line - if you are adding 15g of sugar / liter and your batch is 6 gallons (or 22.7 l) then this will increase the SG by 5 points (approximately).
 

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