How many drinks per person at a party?

The standard rule is 1 drink for the first hour and 0.5 drinks each additional hour. A 4-hour party works out to about 2.5 drinks per person. Always add a 20% safety buffer.

How many bottles of wine for 50 guests?

If half your guests drink wine at a 4-hour party: 25 guests × 2.5 drinks × 1.2 buffer = 75 glasses. At 5 glasses per bottle, you need about 15 bottles of wine.

How much ice do I need for a party?

Plan for 1.5 lbs of ice per person. For 50 guests that is 75 lbs — about three 25-lb bags — to keep drinks cold throughout the event.

What percentage of guests do not drink alcohol?

On average about 20% of guests at a social event are non-drinkers. Plan non-alcoholic options like sparkling water, lemonade, or mocktails at the same 1 drink/hour rate.

Drinks Per Person Calculator

Calculate exactly how many drinks you need for any party or event. Enter guest count, duration, and drink mix to get beer, wine, and cocktail quantities with a 20% buffer.

Number of Guests ?

Event Duration (hours)

hrs

Beer %

Wine %

Cocktail/Spirits %

Total Drinks Needed (with buffer)

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Beers —

Wine Glasses —

Cocktails/Mixed Drinks —

Extended More scenarios, charts & detailed breakdown ▾

Guests

Duration (hrs)

hrs

Total Drinks

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Beer Cases (24-pack) —

Wine Bottles —

Professional Full parameters & maximum detail ▾

Guests

Duration (hrs)

hrs

Beer %

Wine %

Non-Alcoholic Guests %

Avg Cost per Drink ($)

Quantities

Total Drinks (with buffer) —

Wine Bottles —

Beers —

Non-Alcoholic Servings —

Supplies & Cost

Ice (lbs) —

Estimated Beverage Cost —

How to Use This Calculator

Enter the number of guests (adults only).
Set event duration in hours.
Adjust the beer/wine/cocktail mix to match your crowd.
Switch tabs for wedding, cocktail hour, or pro planning modes.

Formula

Drinks per person = 1 (first hour) + 0.5 × (hours − 1)

Total with buffer = Guests × Drinks/person × 1.20

Example

40 guests, 4-hour party: 1 + (3 × 0.5) = 2.5 drinks/person. 40 × 2.5 × 1.2 = 120 drinks total.

Frequently Asked Questions

The standard rule is 1 drink for the first hour and 0.5 drinks each additional hour. A 4-hour party works out to about 2.5 drinks per person. Always add a 20% safety buffer.
If half your guests drink wine at a 4-hour party: 25 guests × 2.5 drinks × 1.2 buffer = 75 glasses. At 5 glasses per bottle, you need about 15 bottles of wine.
Plan for 1.5 lbs of ice per person. For 50 guests that is 75 lbs — about three 25-lb bags — to keep drinks cold throughout the event.
On average about 20% of guests at a social event are non-drinkers. Plan non-alcoholic options like sparkling water, lemonade, or mocktails at the same 1 drink/hour rate.

Related Calculators

Sources & References (5) ▾

WeddingWire Alcohol Calculator Guide — WeddingWire
The Knot Wedding Bar & Drink Planning — The Knot
USDA Dietary Guidelines — Alcohol Consumption — USDA
Liquor.com Bar Stocking Guide — Liquor.com
BevSpot Beverage Program Management — BevSpot