Enter the total number of adults and the total length of the event into the calculator to estimate the number of drinks needed for the event.

Event Drink Formula

The following equation is used to calculate the number of drinks needed for an event..

#D = #A * T * 1.25

  • Where #D is the number of drinks
  • #A is the number of adults at the event
  • T is the total time of the event (hours)

What is the Average Amount of Drinks a Person Has at an Event?

The average person will consume about one and a quarter drinks per hour at an event that has an open bar. Some may drink much more than this, and some may drink less, but 1.25 drinks per hour is accurate on average.

For events where the bar is not open, the drinks per hour decreases as people watch their spending.

How to Calculate Drinks Needed for an Event?

Example Problem:

The following example outlines the steps and information needed to calculate the drinks needed for an event.

First, determine the total number of adults at the event. In this case, the event is a wedding and the number of adults is 200.

Next, determine the time of the event. In this case, the wedding is 5 hours long.

Finally, calculate the number of drinks needed using the formula above:

#D = #A * T * 1.25

#D = 200* 5 * 1.25

#D = 1,250 drinks