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Outdoor table with food, drinks, and fruit arranged for a large family reunion


How to Calculate Food and Drinks for a Large Family Event

What if you run out of food? What if you way overbuy? How much alcohol is actually enough? How do you account for kids and seniors at the same table?

Figuring out food and drinks for a big family event is one of the most stressful parts of the whole thing. Once your group hits 30 people or more, winging it usually costs you, in money, in stress, and in a lot of food nobody eats. This guide gives you real numbers to work with.

1

Start with the basics: what kind of event is this?

Before you do any math, answer these questions:

  • Is it one meal or multiple meals throughout the day?
  • Is this a single day or a full weekend?
  • Will you need breakfast, lunch, and dinner?
  • Is it a formal sit-down or a casual backyard hangout?

A one-afternoon cookout and a three-day family reunion are completely different animals. The type of event shapes everything else.


2

How much food per person, real numbers

These are the reference amounts that actually work for large family gatherings:

Main course

  • Adults: 10–12 oz (300–350 g)
  • Kids: 5–7 oz (150–200 g)

Sides

  • 2 to 3 options (rice, salad, veggies)
  • 3.5–5 oz (100–150 g) per side, per person

Dessert

  • 3.5–4 oz (100–120 g) per person

General rule

  • Plan a little extra as buffer
  • Don't double everything "just in case"

3

Not everyone eats the same, plan for it

Calculating as if every guest is a hungry adult is the most common mistake people make. Here's the reality:

  • Young kids eat a fraction of what adults do
  • Older adults tend to go lighter on portions
  • Teenagers and young adults will go back for seconds, guaranteed

When you plan by age group instead of headcount, you cut waste without anyone leaving hungry.


4

Non-alcoholic drinks: how much to buy

Per person, per day — use these as your baseline:

  • Water: 50–68 oz (1.5–2 liters)
  • Sodas or juice: about 17 oz (500 ml)
  • Drinks for kids: 10–17 oz (300–500 ml)
Hot weather or outdoor activities? Bump those numbers up a bit. People drink more than they expect when they're outside and moving around.

5

Alcohol: how much is actually enough

For a family event with moderate drinking, these amounts hold up well:

  • Wine: 1 bottle per 4–5 adults
  • Liquor: 1 bottle per 8–10 adults
  • Beer: 2–3 per adult for longer events
Family gatherings tend to be a lot more relaxed than a party crowd. Don't overbuy based on what you'd stock for a house party.

6

Keep the menu simple, it's not a restaurant

When you're feeding a big group, fewer choices almost always wins:

  • Fewer dishes, better quality on each one
  • Choose things that are easy to serve at scale
  • Go with crowd-pleasers, not experimental recipes

This cuts down on confusion, wait times, and the amount of food that ends up untouched.


7

The easiest option: a venue that handles food for you

When you pick a place that already includes catering or food service, the whole calculation changes:

They do the math, you don't have to
Portions adjusted by age and event length
No unnecessary waste
No trips to the store, no logistics headaches

This matters a lot when your event stretches across multiple days.


8

Your job is to enjoy it, not run the kitchen

The whole point of a family reunion is to actually be there, talking, laughing, being present. Not chasing down ice, managing serving lines, or cleaning up dishes between meals. When someone else handles that, you get to show up as a guest at your own event.

Plan your family event near Mexico City, without the stress

Camper Club Malinalco hosts groups from 30 to 250+ people in a private outdoor venue with food service, lodging, cleaning, and amenities for all ages. A short drive from Mexico City, and zero logistics headaches.

See group vacation rentals →

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