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, standard 6 oz cups, about 1.5 cups per guest (the calculator adjusts for afternoon and evening): Every row is the calculator above at its default settings.
| Guests | Gallons of coffee | Ground coffee | Cups to have on hand | Creamer / half-and-half |
|---|---|---|---|---|
| 10 | 0.8 | 0.6 lb | 15 cups | 0.2 quarts |
| 15 | 1.1 | 0.8 lb | 23 cups | 0.2 quarts |
| 20 | 1.5 | 1.1 lb | 30 cups | 0.3 quarts |
| 25 | 1.9 | 1.4 lb | 38 cups | 0.4 quarts |
| 30 | 2.3 | 1.7 lb | 45 cups | 0.4 quarts |
| 40 | 3.0 | 2.3 lb | 60 cups | 0.6 quarts |
| 50 | 3.8 | 2.8 lb | 75 cups | 0.7 quarts |
| 75 | 5.6 | 4.2 lb | 113 cups | 1.0 quarts |
| 100 | 7.5 | 5.6 lb | 150 cups | 1.3 quarts |
| 150 | 11.3 | 8.4 lb | 225 cups | 1.9 quarts |
| 200 | 15.0 | 11.3 lb | 300 cups | 2.6 quarts |
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.
How much coffee do I need for 25 people?
For 25 guests at a morning event, plan about 1.9 gallons of brewed coffee — 20 coffee drinkers × 1.5 cups = 30 cups of 8 oz. That takes roughly 1.4 lb of ground coffee, and you'll want 38 cups on hand with about 0.4 quarts of creamer. Afternoon and evening events need less.
How much coffee do I need for 50 people?
For 50 guests at a morning event, plan about 3.8 gallons of brewed coffee — 40 coffee drinkers × 1.5 cups = 60 cups of 8 oz. That takes roughly 2.8 lb of ground coffee, and you'll want 75 cups on hand with about 0.7 quarts of creamer. Afternoon and evening events need less.
How much coffee do I need for 100 people?
For 100 guests at a morning event, plan about 7.5 gallons of brewed coffee — 80 coffee drinkers × 1.5 cups = 120 cups of 8 oz. That takes roughly 5.6 lb of ground coffee, and you'll want 150 cups on hand with about 1.3 quarts of creamer. Afternoon and evening events need less.
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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