One of the hardest parts about planning a party is deciding how much food to prepare. It’s every host’s fear to imagine running out of appetizers, but it’s just as frustrating when you’re left with way too many leftovers! Before your next gathering, check out these helpful tips for portion planning and avoid these entertaining mishaps.

• Consider this: on average, a guest will drink between three and four drinks every four hours or so. You might also want to keep in mind that a standard bottle of wine equals four to six glasses, while a two-liter of soda equals about 10 glasses.
• For appetizers, imagine that each person will eat approximately five per hour. If you’re serving only appetizers and hors d’oeuvres, add two or three to that number.
• For your main course, choose things like meat and vegetables to make it easy to dole out portions. If you’re serving something like stir-fry or pasta, imagine that the average person will eat approximately a four-ounce serving.
• Once you get to dessert, it’s safe to assume that each person will have only one piece — although it’s always smart to get a few extras just in case.

How to Estimate the Food You Need for Your Memorial Day Picnic, Barbecue, or Pool Party [Delish]
How to Calculate the Amount of Food You Need for a Party [Livestrong]
Food & Beverage Quantities to Order [Planning Helper]

CC-BY-2.0/Flickr Jun Seita