Calculate how much beer, wine, and liquor to buy for a wedding or large event. Covers open bar, beer & wine only, and limited bar with seasonal and time-based adjustments.
Planning the bar for a wedding reception is one of the most stressful logistics challenges: buy too little and guests complain; buy too much and you're stuck with cases of unopened wine. The standard rule of thumb is one drink per person per hour for the first hour, then 0.5-0.75 drinks per hour after that. For a 5-hour reception with 150 guests, that's roughly 525-600 drinks total.
But averages only tell part of the story. A summer outdoor wedding skews heavily toward beer and chilled white wine. A formal winter gala sees more cocktails and red wine. Evening receptions run 20% higher consumption than daytime events. A younger crowd drinks more beer; an older crowd drinks more wine. And the first hour (cocktail hour) always sees the highest per-person consumption.
This calculator handles all these variables: guest count, event duration, bar type (full open bar, beer & wine only, or limited), drinking intensity, season, time of day, and the beer/wine/spirit split. It outputs exact quantities in bottles, cases, and kegs, plus a shopping list with cost estimates and crucial extras like ice, mixers, and garnishes.
Running out of alcohol at a wedding is a hosting nightmare. This calculator prevents both shortage and expensive over-buying with precise, event-adjusted estimates. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation. Align this note with review checkpoints.
Drinks per person = 1 × first hour + 0.75 × remaining hours. Total drinks = Guests × Drinks per person × non-drinker adjustment (85%). Split: Open bar = 40% liquor, 30% wine, 30% beer. Beer & wine = 60% wine, 40% beer. Standard servings: 1 bottle wine = 5 glasses, 1 liquor bottle (750mL) = 16 cocktails, 1 keg = 165 beers.
Result: 38 bottles wine, 10 cases beer, 9 bottles liquor
150 guests × 85% drinkers = 128 active drinkers. 1 + 0.75 × 4 = 4 drinks/person. 128 × 4 = 512 drinks. Open bar split (summer-adjusted): 25% liquor, 35% wine, 40% beer. 179 wines = 36 bottles, 205 beers = 8.5 cases, 128 cocktails = 8 bottles.
**Full Open Bar:** All spirits, wine, beer, and mixers. Highest cost but most impressive. Best for formal receptions. Budget: $20-35/person (self-stock). **Beer & Wine Only:** The most popular budget choice. Eliminates hard liquor and mixers. Perfectly respectable for any wedding style. Budget: $12-20/person. **Limited/Signature Cocktail:** Offer 1-2 signature cocktails plus beer and wine. Reduces spirit variety/cost while adding a personal touch. Budget: $15-25/person.
**Summer:** +15% beer, +10% white wine, -15% red wine, -10% spirits. People drink lighter in heat. Plan 50% more ice. **Winter:** -10% beer, -5% white wine, +15% red wine, +10% spirits (warm cocktails popular). **Spring/Fall:** Close to baseline split. Rosé is popular in spring.
**Cocktail Hour (Hour 1):** Highest consumption — 1 drink per person. **Hours 2-3 (Dinner):** Drops to 0.5 per person (food absorbs alcohol). **Hours 4-5 (Dancing/Party):** Picks back up to 0.75 per person. **After Hour 5:** Drops to 0.5 (some guests leaving). This pattern means front-loading: have the most staff and stocked bar during cocktail hour.
Plan for about 4-5 drinks per person over a 5-hour reception. First hour averages 1 drink/person, then 0.5-0.75 per hour after. Reduce total by 15-20% since not everyone drinks alcohol.
A self-stocked open bar costs $15-30 per person depending on the quality of spirits. A caterer/venue open bar typically costs $45-75+ per person. Beer & wine only is about 30% cheaper.
For a mixed crowd: 40% of drinks as cocktails (spirits), 30% as wine, 30% as beer. For beer & wine only: 55-60% wine, 40-45% beer. Summer tilts toward beer; winter toward wine and spirits.
Kegs are cheaper per serving (~$0.50-0.70/beer vs $1-1.50 for bottled), but require draft equipment and ice. Most weddings over 100 guests benefit from at least one keg. Under 75 guests, cans/bottles are more practical.
Most states allow return of unopened bottles/cases to the original retailer with a receipt. Ask before purchasing. ALWAYS buy returnable quantities — it's better to over-buy and return than to run out.
Plan 1-1.5 lbs of ice per person. For 150 guests: 150-225 lbs of ice. This covers chilling drinks (60%), cocktail ice (30%), and display/cooler (10%). Buy more if it's a hot outdoor event.