Wedding Alcohol Calculator with Signature Drinks: How Much to Buy
2026-08-25 · 6 min read
Planning a wedding bar is mostly math. Once you add signature cocktails, the math gets a little bigger. This post walks through how a wedding alcohol calculator handles beer, wine, champagne, liquor, and mixers when your bar menu includes two signature drinks.
Start With the Base Wedding Alcohol Formula
The formula behind most wedding alcohol calculators is simple: guests x hours x drinks per person per hour x 1.15. The 1.15 is a 15% buffer, because nobody wants the bar to run dry during the last dance. For 100 guests and a 5-hour reception, that gives you about 575 total drinks before you split anything into categories.
Most calculators split that total as 48% beer, 27% wine, and 15% liquor, then add champagne separately for the toast. That split works well for a mixed crowd, and it is what our calculator uses by default.
How Signature Drinks Fit Into the Calculation
Signature cocktails do not come out of the liquor share. They add drinks on top. Our calculator estimates 1.5 drinks per cocktail type per guest. Two signature cocktails for 100 guests means 300 extra drinks. That is a meaningful jump, and it is why the liquor number can surprise people.
Those extra drinks also mean more mixers. Each cocktail needs juice, soda, or tonic, so the mixer estimate grows with the cocktail count. If you add one espresso martini, one margarita, and one gin fizz, the shopping list changes a lot more than the menu does.
Worked Example: 100 Guests, 5 Hours, Two Cocktails
Here is what the calculator returns for 100 guests, 5 hours, Average drinking style, a champagne toast, and two signature cocktails:
Beer: about 12 cases. Wine: about 31 bottles. Champagne: about 10 bottles. Liquor: about 23 bottles of 750ml, which includes the cocktail base. Mixers: around 97 liters. Estimated cost: roughly $1,050 to $2,070.
The exact numbers depend on your drinking style and hours. Switch the event to Light and the liquor count drops noticeably. Run the same setup for 6 hours and every category creeps up.
Tips for Ordering With Signature Cocktails
One signature cocktail is usually enough for weddings under 150 guests. Two feels special but roughly doubles the cocktail drink count, and guests rarely finish both options evenly.
Pick cocktails that share a base spirit. Two vodka drinks let you stock one bottle type instead of three. That makes the bar easier to run and easier to return unsold bottles.
Remember non-drinkers. Add soft drinks and water to the plan even when the bar is cocktail-heavy. Our calculator includes both, so the final shopping list is not just alcohol.
Use the calculator to test a few menus before you talk to your venue or liquor store. Change the cocktail count, watch the liquor total move, and buy with numbers instead of a guess.