First, if you are female - 2pts, nursing - 12pts. Then take your age:
17-26 add 4 points to your weight watchers point total. If you are between 27-37 add 3 points; 38-47 add 2; 48-57 add 1; and over 58 add 0.
Next, you will take the numbers you added together in step 1 and 2 and then adjust it for your weight and height. You are going to take the first two numbers of your weight. (You would add 20 if you weighed 204 pounds.) You will also adjust for your height. If you are under 5 ft you will add 0, between 5'0" and 5'9" you will add 1, and over 5'10" add 2.
Lastly, you will calculate how weight watchers points you get by adjusting for your activity level. If you spend most of your day sitting down, add 0 to your weight watchers points total. If you are occasionally sitting but mostly standing add 2. If you are walking most of the time add 4. If you do physically difficult work, add 6.
I hope that's helpful. Good luck on your journey.