Sounds like you didn't have enough sugar.
If you're better at maths than me. You can work out how much sugar you need.
http://jimsbeerkit.co.uk/recipe_formulation.htm
Be nice if someone changed that into a calculator.
Any excel gods about?
So you can work it out either way round either NPR owing sugar and what % you want, or npknowing sugar and quantities and giving you a %
1.000 means its done, doesnt it?
?
Not really, you shouldn't get a reading of one.
For beer you roughly want a starting point of around 1.050
After fermentation you should have a reduction around the 75% mark.
So fermentation should be complete around the 1.012 mark
Now with cider, you haven't got all the other ingredients in there that's where I think the raised gravity reading comes from.
Also if it's carbonated it'll mess reading up, as will bubbles forming on the hydrometer.
Most place recommend you wait to get the same reading for three days to ensure its fully fermented.
You can use starting and end gravity to work out alcohol content. Simple calculator here
http://www.brewersfriend.com/abv-calculator/
My what will be root beer started at 1.062 now as its just a base, water sugar and yeast. I imagine it will get to around 1.000
Which would be 8.14%
However if it ferments like beer ~75%
That would be 6.17%
I expect it'll end up somewhere in the middle.
Once it's done I'm oing to sphon out into a fermenting bin with tap, mix in the root beer concentrate. Leave for one day, to allow more sediment to settle out. Fill bottles with a little sugar for priming an fill up and leave for a few weeks.