Key takeaways
- Plan about one beer per beer drinker per hour — guests × beer share × hours = total beers.
- Convert the total: 24 beers per case, ~165 (12 oz) pours per half-barrel keg.
- Pick a keg once you'd buy roughly four or more cases of the same beer — it's cheaper per ounce and less trash.
- 50 guests × 60% beer × 4 hours ≈ 120 beers → 5 cases, 0.7 keg (so one keg), 120 cans.
How to calculate beer and kegs for a party
Sizing the beer run is two steps: figure out how many people will actually drink beer, then estimate how many beers they'll get through and convert that into cases, cans, or kegs. The standard host's rule is one beer per beer drinker per hour, which holds up well across most events.
The beer share is just how your crowd leans. A beer-and-wings crowd might be 80% beer; a cocktail party might be 30%. Set it to match what you'll actually pour.
Worked example: 50 guests, 4 hours
At a 60% beer share, that's 50 × 0.60 = 30 beer drinkers. Over 4 hours at one beer each per hour that's 30 × 4 = 120 beers. Converting: 120 ÷ 24 = 5.0 cases, or 120 ÷ 165 ≈ 0.7 of a half-barrel keg (so one keg covers it), which is the same as 120 cans or bottles.
Servings per beer container
| Container | 12 oz servings |
|---|---|
| Six-pack | 6 |
| Case | 24 |
| Sixtel (1/6 barrel) | ≈ 55 |
| Half-barrel keg | ≈ 165 |
Buy a little extra — and plan the rest
Round up and add ~10% so you don't run dry; unopened cans and bottles keep. If you're also pouring wine and cocktails, lower the beer share and balance the rest with the drinks for a party calculator. And don't forget the cooler — size the ice for a party separately if you're chilling cans, cases, or packing a keg tub.
Frequently asked questions
How much beer do I need for a party?
About 1 beer per beer drinker per hour. 50 guests at 60% beer × 4 hours = 120 beers — roughly 5 cases or one half-barrel keg.
How many beers are in a keg?
A half-barrel holds ~165 twelve-ounce pours (about 7 cases); a sixtel holds ~55. Plan kegs in 12 oz pours, not pints.
Keg vs cases — which and when?
A keg is cheaper per ounce and less trash but needs a tap, ice tub, and a quick finish. Go keg once you'd buy ~4+ cases of one beer.
How many cases for 50 guests?
About 120 beers for 50 guests at 60% beer over 4 hours — that's 5 cases of 24. Buy a little extra; unopened keeps.
How much ice to chill it?
Roughly 1–1.5 lb per guest for chilling, plus extra for a keg tub. 50 guests ≈ 50–75 lb. Size it separately.
Light beer vs craft — does the count change?
No — one 12 oz beer is one drink either way. Higher-ABV craft may pace slower; keep the one-per-hour rule and adjust.
Keg and case yields are standard brewing figures — a U.S. half barrel holds 15.5 gallons (1,984 oz), which is about 165 twelve-ounce pours. See this keg sizing reference. Per-guest-per-hour and beer-share figures are standard hosting estimates.
Last reviewed June 2026