WW Food and Point Issues - Serving sizes for original recipes

HI EVERYONE!
I use the Recipe Builder on the WW website but I'm having difficulty figuring out how many servings my recipe yields and how much food that is in each serving (i.e. how many cups of whatever in each serving)...alot of the recipes I enter are my own so I do not have a cookbook to tell me how much is in each serving...does anyone have a formula or anything that can help me out??? :?:
Thank you in advance

Make it and measure it out or weigh it out and divide it into the number of servings you want it to be and then you'll know the serving size.