🍹 For BBQs, Garden Parties & Birthdays

Party Drink Calculator – How Much Beer, Wine & Drinks Do You Need?

Enter your guest count and party type – and instantly get your personal shopping list for beer, wine, summer drinks, soft drinks and ice.

Why These Amounts?

The calculator works from total consumption per person for a reference garden party (6 h, moderate): a beer drinker goes through about 3 L of beer over the evening (roughly 6 × 12 oz bottles), a wine drinker about 0.75 L (about 5 glasses), a summer-drinks person about 4 Aperol Spritzes, and a spirits drinker about 0.2 L (3–4 shots). These base amounts are scaled by party type (BBQ Night: 65%; Garden Party: 100% baseline; Birthday: 115%; Summer Festival: 170%), intensity (light: 70%; moderate: 100%; heavy: 135%), and a 10% buffer. The active drink category shares (beer 40%, wine 25%, summer drinks 25%, spirits 10%) redistribute proportionally when categories are deactivated.

Drinks for Different Group Sizes – Real Numbers

Guests	Party type	Beer	Wine	Ice	Soft drinks
10 guests	BBQ Night (4 h)	1 case	2 btl.	11 lbs / 5 kg	0.5 gal / 2.5 L
15 guests	Garden Party (6 h)	3 cases	4 btl.	22 lbs / 10 kg	1.5 gal / 5 L
20 guests	Garden Party (6 h)	3 cases	5 btl.	29 lbs / 13 kg	1.5 gal / 6.5 L
30 guests	Birthday (6 h)	5 cases	9 btl.	44 lbs / 20 kg	2.5 gal / 9.5 L
50 guests	Summer Festival (8 h)	12 cases	22 btl.	97 lbs / 44 kg	5 gal / 20 L
80 guests	Summer Festival (8 h)	19 cases	34 btl.	154 lbs / 70 kg	8 gal / 32 L
100 guests	Summer Festival (8 h)	24 cases	43 btl.	192 lbs / 87 kg	10 gal / 40 L

Basis: moderate intensity, all categories active, ~10% non-drinkers, includes 10% buffer. 1 case = 24 × 12 oz / 355 ml bottles.

BBQ Night vs. Garden Party – What Changes?

Both sound similar but the drink requirements differ noticeably. A BBQ Night runs 4 hours — guests are focused on food and drinking is concentrated. A Garden Party runs 6 hours with more relaxed conversation and another round — that's why you need roughly 50% more drinks.

20 guests (18 drinkers)	BBQ Night (4 h)	Garden Party (6 h)
Beer	2 cases	3 cases
Wine	4 bottles	5 bottles
Ice	20 lbs / 9 kg	29 lbs / 13 kg
Soft drinks	1 gal / 4.5 L	1.5 gal / 6.5 L

Planning food for the same event? Our Grilling Calculator tells you exactly how much meat, sausages, and sides to get for your group.

With Summer Drinks vs. Without

Aperol Spritz and Hugo cocktails have two effects: they increase ice needs significantly — and at the same time reduce beer and wine quantities, because the share of total consumption is redistributed across more categories.

20 guests, Garden Party (6 h)	No summer drinks	With summer drinks
Beer	4 cases	3 cases
Wine	7 bottles	5 bottles
Prosecco	–	3 bottles
Aperol / Liqueur	–	2 bottles (700 ml)
Soda water	–	1.5 L
Ice	22 lbs / 10 kg	29 lbs / 13 kg

When summer drinks are on the menu, always buy 30% more ice — cubes in glasses melt much faster than ice sitting in a cooler.

Common Drink Planning Mistakes

❌ Buying too little ice
Problem: Ice melts 2–3× faster than most people expect, especially at 75 °F / 25 °C+. With summer drinks, your cubes can be gone after 2 hours.
✅ Fix: Rule of thumb — 1 lb / 500 g per person minimum. With summer drinks or hot weather: 1.5 lbs / 700–800 g per person. Too much ice is never a problem — tip the rest into the cooler.

❌ Forgetting water
Problem: Drinkers need water too — especially when mixing alcohol with summer heat. Offering only beer and wine leaves guests feeling rough the next day.
✅ Fix: Plan at least 7 fl oz / 0.2 L of water per person per hour for all guests. 20 guests, 6 hours = about 2 gallons / 8 liters. In temperatures above 85 °F / 30 °C, add 50% more.

❌ Only one type of soft drink
Problem: Non-drinkers, kids, and designated drivers don't want to drink the same thing for 6 hours. Offering only cola is a classic miss.
✅ Fix: At least 3 options: cola, lemonade/sprite, and juice. Bonus: a non-alcoholic cocktail mix (Virgin Hugo, mocktail) — it costs little and goes down very well.

❌ Drinks not pre-chilled
Problem: A case of beer from the garage takes 2+ hours to get cold in a cooler. Guests end up waiting or drinking warm beer.
✅ Fix: Fill your fridge or cooler 4–6 hours in advance. Beer on ice reaches drinking temperature in 30–45 minutes. Key: pre-chill the cooler walls before adding drinks.

❌ Incomplete summer drink ingredients
Problem: The Aperol's there but no prosecco. Or no soda water. Or no ice for glasses (separate from the cooler supply).
✅ Fix: Write a complete list: Aperol, prosecco, soda water, orange slices, ice for glasses. Per Spritz: 2 oz / 60 ml Aperol, 3 oz / 90 ml prosecco, 1–3 oz / 30–80 ml soda.

❌ Not enough cups
Problem: Guests put cups down, lose them, grab a new one. 60 cups for 20 guests often doesn't cut it.
✅ Fix: Plan 3 cups per person. Tip: put out markers so guests can write their names on cups — saves cups and adds a fun touch.

Frequently Asked Questions

How much beer do I need for 20 people at a BBQ?

For a BBQ night (about 4 hours) with 20 guests, 18 of whom drink, you'll need roughly 2 cases of beer (about 44 bottles). That's around 2–3 bottles per drinking guest. For a longer garden party, plan for 3 cases.

How many bottles of wine do I need for 30 guests?

For a garden party with 30 guests (about 27 drinkers), you'll need about 7–9 bottles of wine. One bottle yields about 5 glasses. In summer, plan a mix of white wine and rosé – red wine is consumed significantly less in the heat.

How much Aperol do I need for a party of 20 people?

When summer drinks are one of several options, for 20 guests at a garden party you'll need about 2 bottles of Aperol (700 ml), 3 bottles of prosecco, and about 1.5 liters of soda water. One Aperol Spritz uses 60 ml Aperol, 90 ml prosecco and 30–80 ml soda.

How much ice do I need for a garden party?

Rule of thumb: 1 lb (500 g) of ice per person. For a garden party with 20 guests without summer drinks, at least 22 lbs (10 kg); with summer drinks, 29 lbs (13 kg). Ice always melts faster than expected – buy more rather than less.

Are 2 cases of beer enough for 20 people?

For a short BBQ (3–4 hours), yes — that works out well. For a garden party or birthday (6+ hours), you'll want 3 cases. It's always better to have one case too many than one too few.

What do non-drinkers drink at a party?

Non-drinkers consume on average about 17 oz (0.5 liters) of soft drinks per hour. For 4 non-drinkers at a 6-hour party, plan about 3 gallons (12 liters) of soft drinks. Offer variety: cola, lemonade, juice, and ideally an alcohol-free option like a Virgin Hugo or mocktail.

How much water do you need for a summer party?

Plan at least 7 fl oz (0.2 liters) of water per person per hour – for all guests including drinkers. For 20 guests at a 6-hour party, that's about 2 gallons (8 liters). In temperatures above 85 °F (30 °C), add 50% more.

How many cups do I need for a party of 50 guests?

Plan 3 cups per person, so 150 cups for 50 guests. Guests lose track of their cups. Tip: offer markers so guests can write their names on cups – saves cups and adds a fun party touch.

Special Scenarios: New Year's Eve, Birthdays, Festivals

Not every party runs the same way. Three cases that are often underestimated:

New Year's Eve: The party runs from 8 PM to 2 AM — 6+ hours with a midnight countdown. Plan +1 bottle of sparkling wine per 3 guests just for the toast. Guests also drink less ice-cold drinks in cold weather, but more wine and mulled drinks.
Surprise birthday with staggered arrivals: Early guests drink 2 hours more than latecomers. Budget generously for the first round — the second and third rounds are typically lighter.
Festival format (8+ hours): The calculator uses factor 1.7× the garden party baseline, reflecting that drinking intensity varies over long events: lighter midday, heavier in the evening. For 50+ guests, plan 2 coolers and clearly marked drink stations to avoid bottlenecks.

Hosting a winter gathering? Our Raclette Calculator helps you nail the cheese, potatoes, and sides for a perfect Swiss-style evening with friends.