The Weight Watchers points formula is copyrighted, so you'll never find a non-WW website that does the calculations for you. (Or if you do, it will likely get a cease-and-desist order and disappear overnight some night.) The information about how they do it is out there on the internet because people have figured it out, so you can find that info and do your own calculations.
If you can get the points from another source, you can track them here. Go to the tracker and scroll down to "Change Nutrition Goals." Find the button for "Add another nutrient to track." You'll get a drop-down menu with the usual nutrients, then a list of crazy things most people have never heard of. Choose one of those, like beta-sitosterol or serine or something. Add it, and in your mind, re-label it as WW points. Since the information on those nutrients is never on labels and very rarely in any other database, it will pretty much always show zero, so you can edit the nutrition info for all your custom foods.
Another approach is just to create a custom food called "WW point." Then whenever you enter a food, enter the proper number of "servings" of WW point right after it.
I'm going to predict, though, that before long you'll hear yourself say, "Well, if I'm inputting the foods and getting automatic tracking of calories, fiber, and all these other nutrients, then doing the points is just extra work for the same information." WW points are great if you want a simplified summary of what you're eating, but only if their system is doing the simplifying for you. If you have to work it out yourself, it's not simplifying anything.
| current weight: 132.0