Wedding Alcohol Calculator

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Walk-through

How to Use This Calculator

3 steps

1

Enter guest count and event length

Type in your total headcount and how many hours the bar will be open. The calculator assumes a flat rate of about 1 drink per guest, per hour, as a starting point.

2

Set drinks per hour and non-drinkers

Adjust the drinks-per-hour rate if your crowd drinks faster or slower than average, and set the non-drinker percentage to exclude guests who won't be drinking from the total.

3

Adjust your wine, beer, and liquor mix

Use the sliders or a preset (Wine-Forward, Balanced, Beer-Forward, Full Bar) to split the total drinks by type, then check the Shopping List tab for the exact bottles, cases, and kegs to buy.

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Reference

Formula & Methodology

2 formulas

Total drinks

totalDrinks = guests × hours × drinksPerHour

Guest count is first reduced by the non-drinker percentage to get the effective drinking headcount, then multiplied by the event length and the drinks-per-hour rate to get the total drink count. That total is split across wine, beer, and liquor using your preference percentages.

Bottles, cases, and kegs

wine bottles = wine drinks ÷ 5; beer cases = beer drinks ÷ 24 (or 1 half-barrel keg ≈ 165 servings); liquor bottles = liquor drinks ÷ 17

A standard 750 mL wine bottle pours about 5 standard 5 oz glasses. A 24-can/bottle case of beer covers 24 standard drinks — a half-barrel keg (15.5 gal) is shown as an alternative, since it holds roughly 165 standard 12 oz servings. A 750 mL bottle of liquor yields about 17 standard 1.5 oz shots. All conversions round up so you don't run short.

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Glossary

Key Terms Explained

7 terms

Drinks per hour The average number of standard drinks a guest has per hour of open bar. About 1 per hour is a common planning baseline, though cocktail hours and toasts can push the early rate higher.

Servings per bottle How many standard pours a bottle yields — about 5 for a 750 mL wine bottle and 17 for a 750 mL liquor bottle — used to convert a drink count into a bottle count.

Keg A half-barrel keg holds 15.5 gallons of beer, or roughly 165 standard 12 oz servings — about the same as 7 cases. Shown as an alternative to buying beer by the case.

Case A standard case of beer holds 24 cans or bottles, each counted as one standard drink.

Open bar A bar where guests don't pay per drink; the host buys enough alcohol upfront to cover the full guest list for the length of the event.

Pour size The standard serving size used to define one drink: a 12 oz beer, a 5 oz glass of wine, or a 1.5 oz shot of liquor.

Drinker mix The percentage split between wine, beer, and liquor drinks. Always sums to 100% — moving one slider proportionally adjusts the other two.

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Scenarios

Real-World Examples

3 worked examples

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Classic reception

100 guests, 5-hour reception, default 40/30/30 mix

Guests 100 Event length 5 hours

At 1 drink per guest per hour, that's 500 total drinks. Split 40% wine / 30% beer / 30% liquor, you'd need about 40 wine bottles, 7 beer cases (or 1 keg), and 9 liquor bottles.

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Casual barn wedding

150 guests, 6-hour reception, beer-heavy preference

Guests 150 Preference 70% beer

A bigger, longer event pushes the total to 900 drinks. With a beer-forward 15/70/15 split, most of that lands as beer — around 27 cases, or roughly 4 kegs — with just a handful of wine and liquor bottles rounding out the bar.

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Non-drinker adjustment

100 guests, 20% non-drinkers

Guests 100 Non-drinkers 20%

Only 80 guests are counted as drinking, so the same 5-hour event now needs 400 total drinks instead of 500 — about 20% less alcohol across every category, while food and non-alcoholic drink planning should still use the full 100-guest headcount.

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Deep Dive

Understanding the Wedding Alcohol Calculator

3 chapters · 4 min read

Buying alcohol for a wedding means avoiding two costly mistakes: running out mid-reception, or hauling home cases of unopened wine. This calculator turns your guest count, event length, and drink preferences into a concrete shopping list of bottles, cases, and kegs.

How the Wedding Alcohol Calculator works

The calculator starts with your total guest count and subtracts any non-drinkers using the non-drinker percentage, leaving an effective drinking headcount. That headcount is multiplied by the event length in hours and the drinks-per-hour rate — about 1 standard drink per guest per hour is a reasonable default, though the first hour of cocktails and toasts often runs a bit higher. The resulting total drink count is then split across wine, beer, and liquor using your preference sliders, and each type is converted into real-world purchasing units — wine and liquor bottles, and beer cases or kegs — using standard serving sizes, always rounding up.

Inputs and what they mean

Guest count is your full headcount, drinkers and non-drinkers alike. Event length is the number of hours the bar is actually open, not the full length of the wedding day. Drinks per hour lets you scale the baseline rate up for a high-energy dance-floor crowd or down for a more reserved sit-down dinner. The non-drinker percentage removes guests who won't be drinking from the alcohol total — designated drivers, younger guests, or a dry-leaning crowd — without affecting your food or non-alcoholic beverage planning, which should still use the full guest count. The wine/beer/liquor sliders always sum to 100%; moving one slider proportionally rebalances the other two.

Limits and edge cases

This calculator estimates typical consumption for a mixed adult crowd at an open bar — it is not a substitute for venue or caterer guidance, local alcohol-service laws, or your own read on your specific guest list. A wedding with an unusually heavy-drinking or unusually light-drinking crowd will diverge from the flat 1-drink-per-hour default; adjust the drinks-per-hour input to match your best estimate. Bottle, case, and keg counts are always rounded up so you don't run dry, which means the shopping list will slightly overestimate the exact total — many hosts add a further ~10% buffer on top for breakage, spills, and unexpected guests, though that buffer is not applied automatically here.

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Questions

Frequently Asked Questions

6 questions

What's a good rule of thumb for how much alcohol to buy for a wedding?+

A common starting point is about 1 standard drink per guest, per hour of open bar, though the first hour (cocktail hour, toasts) often runs a bit higher. This calculator uses a flat drinks-per-hour rate that you can adjust to match your crowd.

How many glasses of wine are in a standard bottle?+

A standard 750 mL wine bottle pours about 5 standard 5 oz glasses. This calculator uses that ratio to convert wine drinks into a bottle count, always rounding up.

How many drinks are in a case of beer?+

A standard case holds 24 cans or bottles, each counted as one standard drink. For bigger events, a half-barrel keg (15.5 gallons) holds roughly 165 standard 12 oz servings — about the same as 7 cases — and is shown as an alternative purchasing unit.

How many shots are in a bottle of liquor?+

A standard 750 mL bottle of liquor yields about 17 standard 1.5 oz shots, which is the ratio this calculator uses to convert liquor drinks into a bottle count.

How do I account for guests who don't drink?+

Raise the non-drinker percentage to reflect the share of your guest list that won't be drinking. This reduces the effective headcount used for the alcohol total, but food and non-alcoholic beverage planning should still use your full guest count.

Should I buy extra as a buffer?+

Many hosts add roughly a 10% buffer on top of the calculated total to cover spills, breakage, and last-minute guests. This calculator's shopping list already rounds every bottle, case, and keg count up — the extra 10% buffer is a suggestion, not something applied automatically to the displayed totals.

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Your Wedding

Drink Preference

Result

Shopping List

Drinks by Guest Count & Hours

Non-Drinker Adjustment

How to Use This Calculator

Enter guest count and event length

Set drinks per hour and non-drinkers

Adjust your wine, beer, and liquor mix

Formula & Methodology

Key Terms Explained

Real-World Examples

Classic reception

Casual barn wedding

Non-drinker adjustment

Understanding the Wedding Alcohol Calculator

How the Wedding Alcohol Calculator works

Inputs and what they mean

Limits and edge cases

Frequently Asked Questions

Get a branded PDF of your results

Wedding Alcohol Calculator

Your Wedding

Drink Preference

Result

Shopping List

Drinks by Guest Count & Hours

Non-Drinker Adjustment

How to Use This Calculator

Enter guest count and event length

Set drinks per hour and non-drinkers

Adjust your wine, beer, and liquor mix

Formula & Methodology

Key Terms Explained

Real-World Examples

Understanding the Wedding Alcohol Calculator

How the Wedding Alcohol Calculator works

Inputs and what they mean

Limits and edge cases

Frequently Asked Questions

Get a branded PDF of your results

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