Exactly How Much Alcohol to Buy for a Wedding of 150 Guests

Running out of alcohol at a wedding is a host's worst nightmare, but massively overbuying is a quick way to blow your budget. If you are hosting a wedding with 150 guests and providing your own alcohol, you need a precise formula, not guesswork.

The Standard Formula

The golden rule of event planning is: Assume every guest will consume one drink per hour of the reception.

For a standard 5-hour reception with 150 adult guests, the math is straightforward:

150 guests x 5 hours = 750 drinks.

However, you must build in a buffer for heavy drinkers, spilled drinks, and eager toasts. Industry professionals recommend adding a 15-20% buffer. Therefore, you should plan for roughly 900 total drinks.

The Beverage Breakdown

Now that you know you need 900 servings, how do you split that between beer, wine, and liquor? The standard industry ratio for a full bar is:

• Wine: 40% (360 drinks)
• Beer: 30% (270 drinks)
• Liquor: 30% (270 drinks)

Note: Adjust this based on your crowd. If your friends are heavy craft beer drinkers, increase the beer ratio. If you are serving a signature cocktail, increase the liquor ratio.

Translating Servings into Bottles

Here is where the rubber meets the road. How does that translate to the shopping cart?

Wine (360 Servings)

A standard 750ml bottle of wine yields 5 generous glasses.

360 servings / 5 = 72 bottles of wine.

Recommendation: Split this evenly between red and white (36 bottles each), unless it's a hot summer outdoor wedding, in which case lean heavier on white wine and rosé (48 white, 24 red).

Beer (270 Servings)

One serving is one 12oz bottle, can, or draft pour.

270 bottles/cans of beer. (This is roughly 11-12 cases of beer).

Recommendation: Offer a light domestic beer (100 bottles), a popular import (100 bottles), and an IPA or local craft beer (70 bottles).

Liquor (270 Servings)

A standard 750ml bottle of liquor yields roughly 16 to 18 standard 1.5oz pours.

270 servings / 16 = 17 bottles of liquor.

Recommendation for a balanced bar:

• 6 bottles of Vodka (the most popular)
• 3 bottles of Bourbon/Whiskey
• 3 bottles of Gin
• 3 bottles of Tequila
• 2 bottles of Light Rum

Don't Forget the Champagne!

If you are doing a formal champagne toast, a standard bottle pours about 8 flute-sized servings. For 150 guests, you will need 19 to 20 bottles of champagne or sparkling wine.

Mixers and Garnishes

If you are providing the liquor, you must provide the mixers. For 150 guests, plan to buy:

• 3-4 gallons of orange juice
• 2 gallons of cranberry juice
• 1 gallon of club soda
• 1 gallon of tonic water
• 3-4 cases of assorted sodas (Cola, Diet Cola, Lemon-Lime)
• Plenty of lemons, limes, and cocktail ice (calculate 1.5 lbs of ice per guest!)

Conclusion

Buying your own alcohol can save you thousands of dollars compared to a venue's per-head open bar package, provided you calculate correctly. Use this guide as your baseline, and don't forget to use our Party Alcohol Calculator at EventZio to easily adjust these numbers for different guest counts and event durations!