Here’s how to stock the bar without running dry or drowning in leftovers.
You’ve booked the venue, sent the invites, and sorted the food. Then comes the question that trips up even seasoned hosts: how much alcohol do you actually buy?
Too little, and someone’s making a beer run mid-party. Too much, and you’re storing bottles in the garage until next summer.
Figuring out how much to buy isn’t complicated. A little planning does most of the work.
Start With Guest Count and Length
Two numbers get you most of the way there: how many people are drinking, and how long the event runs.
A good guideline is two drinks per drinking guest in the first hour, then one per hour after that. For a four-hour party, that’s about five drinks per drinking guest.
| Drinking Guests | 3-Hour Party | 4-Hour Party | 5-Hour Party |
|---|---|---|---|
| 25 | 100 drinks | 125 drinks | 150 drinks |
| 50 | 200 drinks | 250 drinks | 300 drinks |
| 75 | 300 drinks | 375 drinks | 450 drinks |
| 100 | 400 drinks | 500 drinks | 600 drinks |
These are planning numbers, not targets. Real consumption shifts with your crowd, the time of day, how much food is out, how people are getting home, and how many guests skip alcohol. A daytime brunch needs less than an evening reception.
How Much Liquor to Buy
If cocktails are on the menu, work out how many drinks each bottle makes.
A standard 750 mL bottle holds about 25.4 ounces. That’s roughly:
- 16 cocktails at 1.5 ounces of liquor each
- 12 cocktails at 2 ounces each
Those assume clean pours and no spills. For cocktails with multiple spirits, count each ingredient on its own. A party serving 100 liquor-based drinks at 1.5-ounce pours needs about seven 750 mL bottles.
You don’t need a full back bar, either. A few well-chosen spirits cover most popular cocktails. Vodka, tequila, rum, whiskey, and gin give you range, but the real answer is whatever your guests actually drink.
How Much Wine to Buy
A 750 mL bottle pours about five 5-ounce glasses, which makes the math easy. Expecting 50 glasses? Plan for 10 bottles.
For a red-and-white split, read your crowd, menu, and season. White and rosé tend to move at warm-weather events, red at cooler or more formal ones. If you’re not sure, a mix of red, white, and a little sparkling is a safe bet.
Doing a champagne toast? Account for it separately. A 750 mL sparkling bottle gives you about six smaller 4-ounce pours.
How Much Beer to Buy
Beer is the easy part. One 12-ounce can or bottle is one serving. Need 75 beer servings? That’s a little over three 24-packs.
For a mixed crowd, put out a familiar light beer alongside a style or two. No need to turn the night into a craft beer festival unless that’s the plan.
Putting It Together: A Party for 50
Say you’re hosting 50 guests for four hours, and about 40 of them drink. That’s roughly 200 alcoholic drinks. For a crowd that likes a bit of everything:
| Beverage | Share | Quantity |
|---|---|---|
| Cocktails | 40% | 80 drinks, about 5 bottles of liquor at 1.5 oz each |
| Wine | 30% | 60 glasses, about 12 bottles |
| Beer | 30% | 60 cans or bottles |
That’s a starting point, not a shopping law. If your people love margaritas, buy more tequila and less wine. Hosting a wine-first dinner crowd? Shift the other way. The best bar plan is built around your guests, not a generic ratio.
Don’t Forget Mixers, Ice, and Garnishes
Alcohol is only half a bar. You’ll also want:
- Mixers: tonic, club soda, ginger beer, cola, juices, and any specialty cocktail ingredients
- Ice: start around 1 to 2 pounds per guest, more if it’s hot out or you’re also chilling bottles
- Garnishes: lemons, limes, oranges, cherries, fresh herbs, whatever your cocktails call for
- Water: keep plenty available all night
- Non-alcoholic options: mocktails, sparkling water, and sodas for the guests who aren’t drinking
Serving signature cocktails? Write a separate ingredient list for each one. It’s easy to remember the tequila and forget you also need enough lime juice and agave for 75 margaritas.
Three Ways to Make Planning Easier
Keep the cocktail menu tight. Two or three signature drinks, plus beer, wine, and non-alcoholic choices, give plenty of variety without a mile-long shopping list.
Know your crowd. A wedding, a graduation party, a backyard barbecue, and a corporate mixer all drink differently. Factor in the occasion, the time of day, and what your guests actually like.
Bring your bartender in early. An experienced bartender can size the quantities, shape the cocktail menu, and flag the mixers, garnishes, and gear you’ll need before you shop.
A Good Party Starts With a Good Plan
You don’t have to guess your way through the liquor store. Start with your guest count, estimate how many will drink, factor in the length, and build the menu around your crowd.
With our BYOB model, you buy the bottles and we bring everything else: the mixers, garnishes, glassware, tools, and a pro behind the bar. No markups, no mystery. We’ll even help you size the order before you shop.
Planning an event in Atlanta? Let’s build a cocktail experience that fits your guests, your style, and your celebration.
Related: How Many Bartenders Do You Need? · How to Choose the Right Bar Package
