Wedding Alcohol Calculator
Estimate total drinks, beer, wine, and liquor bottles for a wedding from guest count and hours.
What it does
Wedding bar planning starts with a drink count, not a bottle count. Guests, event length, and the share who drink alcohol set the total. Beer, wine, and liquor shares then divide that total into shopping quantities.
This calculator assumes standard drinks: a 12 oz beer, a 5 oz glass of wine, or a 1.5 oz shot of distilled spirits. Those portions contain roughly the same amount of pure alcohol, which makes the split easier to compare. The bottle math uses 5 glasses per 750 mL wine bottle and 17 standard drinks per 750 mL liquor bottle.
The default wedding has 100 guests, 80 % of whom drink, a 4 hour event, and 1 drink per drinking guest per hour. That gives 80 drinking guests and 320 drinks. A 50/30/20 split produces 160 beers, 20 wine bottles, and 4 liquor bottles.
A steady one drink per hour is a planning average, not a prediction for every guest. Some people will not drink at all, some will have one glass, and some will drink faster. The tool rounds bottles up so you do not run out at the end of the calculation, but you should still add a buffer for spills, broken bottles, and a longer-than-planned party.
Mixers, ice, garnishes, cups, napkins, and nonalcoholic drinks are separate. So are bartenders, permits, insurance, and local serving rules. The estimate is a shopping starting point, not a guarantee of quantity or a substitute for professional event planning.
How to use
- Enter the expected number of guests.
- Estimate the percentage who will drink alcohol.
- Enter the planned event length in hours.
- Choose a drinks-per-hour rate, starting with 1 for a typical reception.
- Set beer, wine, and liquor shares that add to 100 %.
- Review the bottle counts and add a buffer for your specific crowd.
Formula
- G
- Number of guests.
- D
- Share of guests who drink alcohol, as a decimal.
- H
- Event length in hours.
- R
- Standard drinks per drinking guest per hour.
- B, W, L
- Beer, wine, and liquor shares of total drinks.
The beer count rounds up to whole 12 oz servings. Wine assumes 5 standard 5 oz glasses per 750 mL bottle. Liquor assumes 17 standard 1.5 oz servings per 750 mL bottle. The three shares must add to 100 % within a small tolerance. The model does not convert between metric and imperial drink sizes; it changes the labels while keeping the same standard-drink math.
Worked example
Example: 100 guests, 80 % drinkers, 4 hours
The default values are already filled in the form.
- Drinking guests: 100 x 0.80 = 80.
- Total drinks: 80 x 4 hours x 1 drink per hour = 320.
- Beer: 320 x 0.50 = 160 servings, rounded up to 160.
- Wine: 320 x 0.30 = 96 glasses. At 5 glasses per bottle, 96 / 5 = 19.2, so 20 bottles.
- Liquor: 320 x 0.20 = 64 standard drinks. At 17 per bottle, 64 / 17 = 3.76, so 4 bottles.
- The tool reports 80 drinking guests, 320 drinks, 160 beers, 20 wine bottles, and 4 liquor bottles.
Reference table
| Guests | Drinkers | Hours | Drinks | Beer | Wine | Liquor |
|---|---|---|---|---|---|---|
| 100 | 80 % | 4 | 320 | 160 | 20 bottles | 4 bottles |
| 100 | 70 % | 5 | 350 | 175 | 21 bottles | 5 bottles |
| 150 | 80 % | 4 | 480 | 240 | 29 bottles | 6 bottles |
| 50 | 90 % | 3 | 135 | 68 | 9 bottles | 2 bottles |
Limits
- The drink rate is an average and cannot predict how a specific guest group will behave.
- The estimate assumes standard drink sizes and does not include mixers, ice, garnishes, or nonalcoholic drinks.
- A cocktail bar, wine service during dinner, or a late-night crowd can change the beer, wine, and liquor split.
- Local laws, venue rules, insurance, and responsible serving practices set limits that no quantity estimate can replace.
Common mistakes
- Using the full guest count as the number of drinkers.
- Forgetting that beer, wine, and liquor shares must add to 100 %.
- Buying only the calculated number of bottles with no buffer for spills or a longer party.
- Ignoring mixers, ice, cups, and nonalcoholic options in the shopping list.
- Serving without checking venue rules, permits, and safe transportation plans.
Try it yourself
Quick checks. Answers sit tucked under each question.
120 guests, 75 % drink, 5 hours, 1 drink per hour, 50/30/20 split. How many total drinks?
Drinking guests are 90. Total drinks are 90 x 5 x 1 = 450. The split gives 225 beers, 27 wine bottles, and 6 liquor bottles.
80 guests, 80 % drink, 3 hours, 1.2 drinks per hour, 40/40/20 split. What are the bottle counts?
Drinking guests are 64 and total drinks are 64 x 3 x 1.2 = 230.4, shown as 231. Beer is 93 servings, wine is 19 bottles, and liquor is 3 bottles.
60 guests, 90 % drink, 4 hours, 1 drink per hour, 60/20/20 split. How many drinks and beers?
Drinking guests are 54 and total drinks are 216. Beer is 129.6, rounded up to 130 servings.
Questions
How much alcohol do I need for a wedding?
Start with the number of drinking guests, multiply by hours and drinks per hour, then split the total among beer, wine, and liquor.
How many glasses are in a bottle of wine?
A standard 750 mL bottle gives about 5 glasses of 5 oz each.
How many drinks are in a 750 mL liquor bottle?
About 17 standard 1.5 oz servings, depending on how generously the bartender pours.
Should I include non-drinkers?
No. Enter the share who drink alcohol so the total reflects the actual drinking crowd. Still provide water and other options for everyone.
How much buffer should I add?
Many planners add 10 to 20 % for spills, breakage, and a longer party. The bottle counts already round up to whole containers.
Does this include mixers and ice?
No. Buy mixers, ice, garnishes, cups, and nonalcoholic drinks separately.