Winemakers?

I got a 6 gallon kit and the SG is 1.040. How much sugar can I add to bring ut up to 1.090?

According to my book. You need 17oz per gallon to reach 1.090

Check out this link:

https://www.beer-wine.com/adjusting-specific-gravity

Perfect. Thank you guys.

Wine must be a lot different than Grain Alcohol. Grain Alcohol is is normally made without Sugar unless you are cheap and in a hurry. I have never used any sugar in my mash. Grandpa would haunt me from his grave.

Well wine doesn't generally get distilled to boost alcohol content...