Coffee Brew Calculator
By using our calculators, you agree to our Terms of Use.
Plan coffee for a crowd or dial in grounds from water volume — crowd mode for brunch hosts, ratio mode for pour-over and drip tuning.
Brew planning
Total brewed coffee
120 fl oz
15 cups for 15 guests
- Fluid ounces
- 120 fl oz
- Cups (8 fl oz)
- 15
- Milliliters
- 3,549 mL
Related calculators
Brewing coffee for a crowd or by ratio
Crowd mode multiplies guest count by ounces of brewed coffee per person — about 8 fl oz (one mug) is a common brunch default, or 6 oz for lighter coffee service alongside other drinks. The result shows total brewed volume in ounces, cups, and milliliters for batch brewers and urns.
Ratio mode uses the classic water-to-coffee weight relationship — a 16:1 ratio means 16 parts water to 1 part coffee by weight. Enter your water volume in fluid ounces and your preferred ratio to estimate grounds needed. Many drip and pour-over recipes land between 15:1 and 17:1 depending on grind and roast.
Example (crowd): 15 guests at 8 oz each needs 120 fl oz of brewed coffee — 15 mugs or about 3.5 L. Example (ratio): 32 oz of water at a 16:1 ratio calls for 2 oz of coffee grounds.
Common questions
How much coffee per person for a brunch?
About 6–8 fl oz of brewed coffee per guest is typical when coffee is one of several beverages; 8–10 oz if it is the main morning drink.
What brew ratio should I use?
16:1 (water to coffee by weight) is a widely used starting point for drip and pour-over. Use 15:1 for a stronger cup or 17:1 for a lighter brew, then adjust to taste.
Does ratio mode use weight or volume for coffee?
The ratio is expressed as water weight to coffee weight. This tool uses fluid ounces as a practical proxy — for precision, weigh both water and grounds on a kitchen scale.