Doing weightwatchers..

[Starlight]

The calculator without a doubt

 

[WMBB]

definitely the calculator!

 

[pinkstardust]

heres a link to a calculator that i use (Weight Watchers POINTS® Calculator) the one you posted is the american version, they calculate using cals, fat, and fibre. I used to do ww over there and now live in the uk, both calculators will work but if you are in the uk use the link to the one I posted.
I haven't bought a thing and I've been able to loose weight, it can be done.
good luck!
x

 

[Beckyftwx]

Cheeers