As of 13 August 2026, AI can calculate how many drinks to buy for your party.

Most people should do this themselves; the prompt is on this page.

Can you do it?

2 minutesto a draft.

5 minutesto something you’d act on.

Cost, all in£0

Skill needednone

Who has to check ityou

What the alternative costsThe available tool data gives no price for a human or software alternative.

If this goes wrong, you buy too much or run short and can usually correct the problem with another shop or a different serving plan.

What to actually do

Do it yourself

The route this page recommends

A chat interface, no skill needed, and roughly 5 minutes until you can act on the result.

How to actually do it

Open your chosen supermarket, drinks supplier or venue price list and note the pack sizes and container sizes available for the drinks you might serve.
Gather the guest count, number of adults, non-drinkers, event start and end times, whether food is served, and the drinks your guests actually prefer.
Paste the prompt into ChatGPT, Claude or Gemini and replace each bracketed slot with your details, including the current pack sizes.
Ask the chatbot to calculate the servings, show the assumptions and round the result to whole packs rather than reporting loose serving totals.
Compare each displayed multiplication and rounding step with the guest numbers and pack sizes you supplied, then amend the shopping list before ordering.
Send the checked list to the supermarket, drinks supplier or venue and confirm their substitutions, delivery limits and storage arrangements.

Prompt

Calculate a party drink shopping list from the details below. Show every assumption and the arithmetic, then round quantities up to whole bottles, cans or cartons using the pack sizes I provide. Separate alcoholic and non-alcoholic drinks, include water, and do not assume that every guest drinks alcohol. Do not recommend unsafe drinking levels or present an estimate as a guarantee. If any information is missing, ask concise questions before calculating.

Event date: [date]
Location: [home, venue or outdoor space]
Number of guests: [number]
Adults: [number]
Guests who will not drink alcohol: [number or unknown]
Guests who may drink heavily, moderately or lightly: [details or unknown]
Event start and end time: [times]
Meal served: [yes or no, and meal type]
Weather or indoor conditions: [details if relevant]
Drinks wanted: [beer, wine, sparkling wine, spirits, cocktails, soft drinks, juice, alcohol-free beer or wine, tea or coffee, water]
Preferred balance between drinks: [details]
Available fridge, cool box or storage space: [details]
Available pack sizes and container sizes: [paste current shop or supplier options]
People serving alcohol: [details]

Return:
1. A table of drink type, serving assumption, total servings, container size and containers to buy.
2. A separate non-alcoholic and water plan.
3. A short list of assumptions that I must confirm.
4. A low-waste adjustment showing what to remove first if I need to buy less.
5. A final shopping list rounded to the pack sizes above. Do not invent prices, products or guest preferences.

Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

Use a tool built for this
Second choice
Hand it to a person
The distant third
A person who owns the outcome does this end to end, worth it when the failure is dear.

What it gets wrong

It cannot know which drinks your guests will actually choose unless you provide that information.
It cannot see your fridge, storage space or the stock and pack sizes that are available when you shop.
It cannot judge whether a cautious or generous allowance suits the people at your party.
It can produce neat arithmetic from a poor assumption, so the assumptions still need your judgement.
It cannot manage serving, consent or responsible alcohol decisions at the event.

Even on a YES, the friction has a name: judgement under ambiguity and stakes of error.

How we scored this

Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.

Axis	Score (0–2)
Output	2
Inputs	2
Verification	2
Liability	2
Effort delta	2
Total	10 / 10

The methodology and its thresholds are published in full.

FAQ

Can ChatGPT work out how many drinks I need for a party?: Yes. Give it the guest numbers, event length, non-drinkers, food, preferences and the pack sizes you can buy, and ask it to show the arithmetic.
How many drinks should I buy per person for a party?: There is no reliable single number for every party because drinking habits, event length, food and non-drinkers vary. Ask AI to calculate separate alcoholic and non-alcoholic quantities from your actual guest list, then check its assumptions.
Can AI calculate beer and wine for a party?: Yes. It can split the total between beer, wine and other drinks, convert servings into bottles or cans, and round up to the pack sizes you provide. It cannot know your guests' preferences unless you tell it.
Can AI plan non-alcoholic drinks for a party?: Yes. Include non-drinkers, drivers, children, water and the event duration in the prompt. Check the result against your guests and available fridge or storage space before buying.

Nearby answers

All Parties & celebrations rulings

Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.

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