How much alcohol per person for a party?

A general rule is 1-1.5 drinks per person per hour. For a 4-hour party, plan for about 4-5 drinks per person. The first hour tends to be heavier, with consumption tapering off. This calculator accounts for this tapering effect.

How do I estimate the split between wine, beer, and spirits?

A common split for a mixed UK party is 40% wine, 40% beer, 10% spirits, and 10% soft drinks. Adjust based on your guests — a summer BBQ might be heavier on beer, while a dinner party leans towards wine.

Should I buy extra just in case?

The calculator already includes a small buffer. However, it is always wise to buy from a retailer with a good returns policy so you can take back unopened bottles. Buy 10-15% more than calculated if you want to be safe.

How much mixer should I buy?

Plan for about 150ml of mixer per spirit drink — that is tonic, soda, or cola. The calculator includes mixer quantities. Buy a mix of tonic, soda, and cola, plus plenty of ice and lemon.

What about non-drinkers?

Always cater for non-drinkers with quality soft drinks, sparkling water, and perhaps a non-alcoholic cocktail or punch. Adjust the soft drinks percentage upward if you know many guests do not drink alcohol.

BakeCalcs

Party Drinks Calculator

Calculate how many bottles of wine, beer, and spirits to buy for a party based on guest count, duration, and preferences.

Number of Guests

Party Duration

Event Type

Wine Drinkers

Beer Drinkers

Spirit Drinkers

Soft Drink Only

How We Calculate This

The calculator estimates total drinks needed based on a consumption rate that varies by event type, then splits the total across drink categories according to your percentage split.

Consumption Rates

Casual party / BBQ: ~1.5 drinks per person per hour
Dinner party: ~1 drink per person per hour
Wedding / formal: ~1.2 drinks per person per hour
Cocktail party: ~1.5 drinks per person per hour

Bottle Conversions

Wine: 1 bottle (750ml) = 5 glasses
Beer: 1 bottle/can = 1 drink
Spirits: 1 bottle (700ml) = 28 single measures (25ml)

Frequently Asked Questions

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Last updated: February 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.