Everyday Life
Party Drink Quantity Calculator
Multiply guests by drinks each, then divide by the drinks per bottle to see how many bottles you need.
The result shows the total drinks needed and the number of bottles to buy, rounded up so there is enough for every guest.
Formula
Total drinks = guests x drinks per guest. Bottles = total drinks / drinks per bottle, rounded up.
How it works
Drinks per bottle depends on the drink: a 750 ml bottle gives about five 150 ml glasses, while larger bottles give more.
Always round bottles up and add a spare or two — running out of drinks ends a party faster than running out of food.
Worked example
For example, 20 guests x 4 drinks per guest = 80 drinks, and 80 / 5 drinks per bottle = 16 bottles.
FAQs
How many glasses from a 750 ml bottle?
About five glasses at 150 ml each, or six smaller 125 ml servings.
Do I need to count water?
Yes — allow at least one bottle of water per few guests, especially at long or warm-weather parties.
What if guests drink different things?
Split the total across drink types by rough preference, and keep one option generous for the most popular choice.
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