A good rule of thumb is to plan for about 1/2 cup of cooked couscous per person as a side dish. But, if you're serving it as a main course, you'll want to bump that up to about 3/4 cup per person. Think of it like a big ol' bowl of pasta - you want to make sure everyone gets a satisfying serving.
Now, you might be wondering, what about all the variables? Like, what if you're serving a lot of other food, or what if some of your guests are super hungry? Good questions! The thing is, couscous is pretty forgiving, so you can't go too wrong - just aim for that 1/2 cup or 3/4 cup serving size and adjust from there.
It's also worth thinking about the type of couscous you're serving - some types, like Israeli couscous, are bigger and chewier than others. Go for the good stuff and choose a high-quality couscous that's got some texture and flavor to it. Your guests will thank you, and it'll make a big difference in the overall dining experience.
Couscous Per Person and Portion Calculator - Miss Vickie