How Much Coffee Do You Need for an Event? Free Guest Calculator

Short answer: for most events, plan on about one drink per guest per hour in the afternoon, and up to 1.5 drinks per guest in a two-hour morning event. The exact number depends on the time of day, the type of event and whether the coffee is the main attraction or a side. Below is a simple calculator you can do in your head.

These are planning estimates based on how events typically run, not hard rules. Use them to get a realistic starting point, then adjust for your crowd.

Step 1: Estimate Total Drinks

Multiply your guest count by the factor for your event type. This assumes a typical two-hour service window.

• Morning events (breakfast, brunch, conferences, bridal showers): about 1.5 drinks per guest. People arrive wanting caffeine and many go back for a second.
• Afternoon events (corporate gatherings, birthdays, baby showers): about 1 drink per guest.
• Evening events (weddings, cocktail hours, galas): about 0.8 drinks per guest. Fewer people order, but those who do often order after dinner or at dessert.
• Late-night send-off: about 0.7 drinks per guest, with a rush at the end of the night.

Example: a 100-guest wedding with coffee after dinner is about 100 × 0.8 = 80 drinks. A 100-person morning conference is about 100 × 1.5 = 150 drinks.

Step 2: Work Out How Many Baristas You Need

A skilled barista makes roughly 30 to 40 milk-based drinks per hour. Simple drinks like a black Americano go faster, and elaborate lattes with custom syrups are slower. Divide your total drinks by the hours of service, then by about 35.

Example: 150 drinks over 2 hours is 75 drinks per hour, which is roughly 2 baristas. 80 drinks over 2 hours is 40 per hour, which one barista can handle.

Round up if guests arrive in waves. A line that forms right after a ceremony or between conference sessions can double the demand for 15 minutes, and that's when a second barista pays for itself.

Step 3: Estimate Milk and Espresso

• Milk: plan on about 1 gallon of milk for every 20 milk-based drinks. Order extra oat and almond milk, since dairy-free requests are common now.
• Espresso beans: about 1 pound of beans makes around 25 double-shot drinks.
• Cups, lids and sleeves: add about 10% to your drink count so you never run short.

If you book a full-service coffee cart, we handle all of this for you. The numbers are useful if you're comparing quotes or planning an in-house setup.

Quick Reference by Guest Count

Approximate drinks for a two-hour service:

• 25 guests: 20 to 40 drinks, depending on the time of day. One barista.
• 50 guests: 40 to 75 drinks. One barista, which fits our starting package.
• 100 guests: 80 to 150 drinks. One or two baristas, depending on the arrival pattern.
• 200 guests: 160 to 300 drinks. Two or three baristas, or a longer service window.

What Changes the Numbers

• Heat. Miami summers push people toward iced drinks, cold brew and matcha, which change both the prep time and the supplies you need.
• Alternatives. If your guests skip alcohol, or the event is mostly morning, expect higher consumption.
• Free vs. paid. When drinks are free and unlimited, people order more. If they pay, they order less.
• Other food and drinks. An open bar or dessert table pulls people away from coffee, while pastries pull them toward it.

Why a Coffee Cart Beats Guessing

Ordering too little means a long line and unhappy guests. Ordering too much means paying for waste. A staffed cart with a professional barista lets you size service to your event and adjust in real time. See how much coffee cart catering costs in Miami to see what's included.

Frequently Asked Questions

How many cups of coffee per person for an event?
Roughly 1 drink per guest in the afternoon, up to 1.5 in the morning, and about 0.8 at an evening event like a wedding.

How many guests can one barista serve?
About 50 guests comfortably over two hours, and more if the service runs longer or guests don't all arrive at once.

How much milk do I need for 100 guests?
For 100 guests at an afternoon event, around 100 drinks, so about 5 gallons, plus dairy-free options.

Should I plan for more drinks if the coffee is free?
Yes. Free, unlimited service usually raises consumption, so lean toward the higher end of each range.

Want us to size it for your event? Request a coffee cart quote and we'll give you one all-inclusive number.