Hi,
I'm a newbie to the forum and to ww.
I'm looking at calculating points for some Gardenay Soup:

250 ml is 120 cal - 1.5g fat and 5g Fibre

so to calculate 500ml, do I just double the calories or do I double the fat and fibre too?

Also, is this online calculator accurate?
www(dot) webmilhouse.com/pointcalc.php

I have my little slide rule book thing from ww as well.

You'll have to double everything

That calculator looks correct but I would double check it with the slider until you feel it's accurate.

Just remember, you'll only be able to count the first 4 grams of fiber.