Coffee Service Calculator
Gallons, pounds of grounds, cups, creamer, and sugar for a breakfast, meeting, or reception — including the decaf nobody drinks but everybody notices.
~1.5 cups each; about 80% of guests take coffee at breakfast.
~1 cup per guest per break, tapering after lunch.
Only ~40% take coffee with dessert.
You need
Enter guest count
| Shopping list | Amount |
|---|---|
| Ground coffee | — |
| Cups to have on hand | — |
| Creamer / half-and-half | — |
| Sugar packets | — |
| Decaf portion | — |
Bulk food-service coffee commonly runs $8–$16 per pound.
How to Calculate Coffee for a Crowd
- Estimate drinkers. ~80% of guests at a morning event, ~40% at an evening one.
- Cups per drinker: 1.5 at breakfast, 1 per coffee break at all-day meetings.
- Convert to gallons: 16 eight-ounce cups per gallon (about 10 twelve-ounce cups).
- Grounds: about 0.75 lb per gallon — a 1 lb bag brews roughly 1.3 gallons.
Coffee formulas
Cups = guests × drinker rate × cups each
Gallons = cups × cup oz ÷ 128 · Grounds lb = gallons × 0.75
Worked example — 50 guests at a breakfast: 40 drinkers × 1.5 = 60 cups = 3.8 gallons, about 2.8 lb of grounds, plus roughly ¾ quart of creamer and ~60 sugar packets.
Coffee by Event Size
Morning event, 8 oz cups:
| Guests | Cups | Gallons | Ground coffee |
|---|---|---|---|
| 25 | 30 | 1.9 | 1.5 lb |
| 50 | 60 | 3.8 | 2.8 lb |
| 100 | 120 | 7.5 | 5.6 lb |
| 200 | 240 | 15 | 11.3 lb |
Tips Before You Brew
- Brew into airpots, not carafes on burners. Coffee turns bitter in ~30 minutes on a hot plate but holds for hours insulated.
- Rent an urn for 50+. A 100-cup urn takes about 45 minutes for its first batch — start early, and plan a second urn rather than a mid-event re-brew.
- Set up the fixings away from the pots — the creamer station is what creates the line, not the coffee.
- Buy more cups than servings (roughly 1.25×) — people set cups down, lose them, and take fresh ones.
- Offer hot water and tea bags too — it costs almost nothing and covers the non-coffee crowd.
Frequently Asked Questions
How much coffee for 50 people?
About 60 cups — 3.8 gallons and ~2.8 lb of grounds at a morning event; roughly half that in the evening.
Cups per gallon?
16 eight-ounce cups, or about 10 twelve-ounce catering cups.
Grounds per gallon?
10–12 oz (about ¾ lb). A 1 lb bag brews ~1.3 gallons.
How much creamer and sugar?
~0.5 oz creamer and 1–2 sugar packets per cup, for the ⅔ of drinkers who add something — about 1 quart and 100 packets per 100 cups.
Do I need decaf?
Yes — about 20% of total. Rarely finished, always noticed when missing.
How long does brewed coffee last?
~30 minutes on a burner; several hours in an insulated airpot.
References
- Specialty Coffee Association — brewing ratios and standards: sca.coffee
- National Coffee Association — brewing basics and holding times: ncausa.org
- Penn State Extension — beverage service for crowds: extension.psu.edu
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