Coffee Brew Calculator

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.

SCAA-style ratios near 1:16–1:18 (coffee:water by weight) balance strength — this tool uses similar ratio logic with your inputs.

Grind size and brew time change extraction even at the same ratio — adjust taste after measuring baseline.

Crowd mode multiplies single-cup math to batch brew for brunch hosting.

Immersion brewing (French press) uses a coarser grind and slightly higher coffee ratio than pour-over at the same cup count — SCAA 1:16 is a starting point; many press recipes land near 1:15 for bolder cups when brewing for four brunch guests. French press often uses ~1:15 versus pour-over 1:16 — SCAA ratios are starting points; taste after measuring baseline strength for brunch batches.

Espresso uses a completely different ratio (~1:2 yield by weight in 25 seconds) — this calculator targets drip and immersion batch brews, not 18 g dose / 36 g out espresso shots. Switch tools when planning cafe service versus carafe coffee. Espresso 1:2 brew ratio by weight is out of scope — this tool targets drip and immersion carafe math, not 18 g dose café shots.

Crowd mode for ten guests at 200 mL cups might target 2 L brewed coffee — at 1:16 ratio that is ~125 g ground coffee total. Grind immediately before brewing; pre-ground coffee stales within hours for large batch taste quality. Ten guests × 200 mL cups ≈ 2 L brewed — at 1:16 that is ~125 g ground coffee ground immediately before brewing for best flavor.