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How to Work Out How Much Food a Party Needs
Heshan Fernando
Co-founder & COO
Forty guests, four hours. How much food, and how much to drink?
The food answer is a per-head figure. The drink answer isn’t — consumption is heavily front-loaded, and a flat per-hour estimate gets both the total and the timing wrong.
Food: per head, by format
Canapés, no meal served: ten to twelve pieces per person over an evening, weighted toward the first hour.
Buffet replacing a meal: around 400 g of substantial food per head. Less if it follows a meal, more if the event runs long or the crowd is young.
Seated meal: standard portions, which is the easy case because it’s the one everyone has experience of.
Drinks-only event: something to eat still matters — salted snacks, olives, crisps. Not for hunger, but because food slows drinking and people appreciate it.
Drink: front-loaded, then steady
The pattern that holds across most events: roughly two drinks in the first hour, then one per hour thereafter, per drinking guest.
For 40 guests over 4 hours that’s about 40 × (2 + 1 + 1 + 1) = 200 drinks. That number surprises people, and it’s where party budgets go wrong.
Two adjustments matter. Plan at least a quarter to a third non-alcoholic — running out of soft drinks is far more common than running out of wine, and the number of people not drinking alcohol has been rising steadily. And provide water everywhere, freely, without anyone having to ask.
| Format | Food Per Head | Notes |
|---|---|---|
| Canapés | 10–12 pieces | Weighted to the first hour |
| Buffet meal | ~400 g | Less if after a meal |
| Seated meal | Standard portions | Easiest to estimate |
| Drinks only | Salted snacks | Slows drinking |
What runs out first
Predictably: bread, ice, and whatever is easiest to eat standing up.
Ice in particular is under-bought at almost every event. It’s cheap, it’s bulky, and running out mid-evening is genuinely disruptive. Buy more than seems reasonable.
The elaborate items — the thing you spent two hours making — are usually the ones with leftovers, because people at a party gravitate toward what they can eat one-handed while talking.
So: over-order the simple things, under-order the complicated ones. It’s the opposite of how most people plan, and it’s consistently right.
Common mistakes to avoid
- Planning drinks at a flat rate per hour, which underestimates the first hour badly.
- Buying too few non-alcoholic options.
- Under-buying ice.
- Making six elaborate items and two simple ones.
- Using the invitation window as the duration — people arrive late and stay later.
- Forgetting serving equipment: plates, napkins and somewhere to put an empty glass.
How to do it with Party Food Quantity Calculator
The Party Food Quantity Calculator plans food per head and drinks by the hour.
- Enter the guest count and how long people will actually be there.
- Choose the format — canapés, buffet, seated or drinks only.
- Read the food and drink estimates separately, since drink is time-based and food isn’t.
- Add margin on the simple items and trim the elaborate ones.
Other event planning tools are in the tools directory.
Frequently asked questions
How much food per person for a buffet?
Around 400 g of substantial food for a meal-replacing buffet, less if it follows a meal. Ten to twelve canapé pieces per head covers an evening where no meal is served.
What proportion should be non-alcoholic?
At least a quarter to a third, and provide water everywhere. Running out of soft drinks is far more common than running out of wine.
What runs out first?
Bread, ice, and whatever is easiest to eat standing up. Over-order those three and under-order the elaborate items.
Final thought
Plan drinks by the hour with the first hour doubled, and buy twice the ice you think you need. Those two adjustments cover most of what goes wrong at a party.