🍷 Party Bar Quantity Calculator

Estimate how many bottles you'll need for your event bar, based on your guest count, the share who drink, and how many drinks each typically has.

Number of guests

Percent who drink (%)

Average drinks per drinker

Servings per bottle

How the bottle count is worked out

Three steps and one round-up at the end:

drinkers     = guests x (percent who drink / 100)
total drinks = drinkers x average drinks per drinker
bottles      = ceiling(total drinks / servings per bottle)

The defaults show it working. 50 guests at 80 % is 40 drinkers, 40 × 3 gives 120 drinks, and 120 ÷ 5 servings comes to 24 bottles. Rounding happens only on the final figure, so 121 drinks would tip you to 25 bottles rather than padding every intermediate number.

Set servings per bottle to match what you pour

The default of 5 is a 750 ml wine bottle at a 5 oz pour. Anything else on the bar has a different yield:

Bottle	Pour	Servings
750 ml wine	5 oz	5
750 ml sparkling	4 oz flute	6
750 ml spirits	1.5 oz	16
1.75 L handle	1.5 oz	39
1 L mixer	4 oz	8

Run the tool once per category instead of averaging them. Split the drinks per drinker the way you expect guests to choose - two wine and one beer, say - and the three runs add up to the same total without hiding a shortage in the average.

Drinks per drinker is a whole-event number, not an hourly one. The usual planning rule is two in the first hour and one an hour after, so the default 3 covers roughly a two-hour party; a five-hour reception is nearer 6. A hot afternoon outdoors raises it again, because people drink faster when they are thirsty and reach for whatever is cold.

Frequently asked questions

How many bottles of wine for 50 guests?

Twenty-four, if wine is the only drink: 40 drinkers at 3 glasses each is 120 pours, and a 750 ml bottle gives 5. Roughly halve that once beer and spirits share the same 120 drinks.

How much liquor do I need for 100 people?

At 80 percent drinking and 3 cocktails each you need 240 drinks. A 750 ml bottle pours 16 at 1.5 oz, so 15 bottles - or seven 1.75 L handles.

What percentage of guests actually drink?

Plan on 70 to 80 percent for a mixed adult crowd. Drop toward 50 for a daytime or family event, and leave anyone under legal drinking age out of the guest count entirely.