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Party Drinks Quantity Calculator

Work out party drinks quantity instantly with clear inputs, formula shown and shareable results.

About Party Drinks Quantity Calculator

The planning rule is one to two drinks per drinker per hour, front-loaded in the first two hours. Splitting the total roughly half beer, a third wine and the rest spirits covers most mixed gatherings, remembering that a bottle of wine pours five glasses.

Formula

Party drinks

drinks = guests x drinking share x hours x drinks per hour; wine bottles = wine glasses / 5

Worked example

With the default values below, Party Drinks Quantity Calculator returns Total drinks needed of 158. Change any input above and every figure here is recalculated in your browser.

Inputs used

Guests
30 guests
Party duration
5 h
Share drinking alcohol
70 %
Drinks per drinker per hour
1.5 drinks/h

Results

Total drinks needed
158 drinks
Bottles of beer (half the volume)
79 bottles
Bottles of wine (a third)
11 bottles
Soft drinks
98 drinks

Step by step

  1. 1Values used
  2. 2Party drinks
  3. 3Total drinks needed= 158 drinks
  4. 4Bottles of beer (half the volume)= 79 bottles
  5. 5Bottles of wine (a third)= 11 bottles
  6. 6Soft drinks= 98 drinks

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many glasses in a bottle of wine?

Five 150 ml glasses from a 750 ml bottle, or six smaller pours. Plan on five to be safe.

Should I buy more than calculated?

Buy a little over on soft drinks and water, which always run short, and check whether the supplier takes returns on unopened alcohol.

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