The Ultimate Brew & Crowd Coffee Calculator | Precise Ratios
Calculate precise coffee-to-water ratios for any brew method or estimate total coffee needs for events and daily consumption.
Note: Logic automatically multiplies this volume by the number of people below.
Inventory Mode: Calculating how many people you can serve with this total supply.
Monthly Mode: Calculating total supply needed for 30 days of this habit.
1:16 is the 'sweet spot' for most drinkers.
Your Recipe
Coffee Needed
Dry weight
Total Water to Pour
Water Poured = Coffee × Ratio (SCA Standard)
For Espresso, aim for this Yield in the cup.
⚠️ High Absorption Note: With strong ratios (like 1:4), coffee grounds absorb ~40% of your water. To get 500ml of concentrate, you must pour nearly 900ml of water.
Understanding the Coffee-to-Water Ratio
The "Golden Ratio" is the secret to coffee-shop quality at home. It simply refers to the relationship between the amount of coffee grounds and water used.
A 1:16 ratio (our default) means for every 1 gram of coffee, you use 16 grams of water. This is widely considered the "Golden Cup Standard" by the Specialty Coffee Association (SCA) because it balances strength and flavour extraction.
Why weight instead of scoops? Coffee beans vary in density. A tablespoon of dark roast weighs less than a tablespoon of light roast. Using a scale (grams) ensures your brew tastes the same every morning.
Recommended Ratios by Brew Method
| Method | Ratio Range | Flavour Profile |
|---|---|---|
| Drip Machine / Pour Over | 1:15 to 1:17 | Clean, balanced |
| French Press | 1:12 to 1:15 | Bold, heavy body |
| AeroPress | 1:11 to 1:16 | Versatile |
| Cold Brew (RTD) | 1:15 to 1:17 | Ready to drink |
| Cold Brew (Concentrate) | 1:4 to 1:5 | Concentrate (needs dilution) |
| Espresso | 1:2 | Concentrated, rich |
| Turkish / Ibrik | 1:10 | Strong, unfiltered |
Frequently Asked Questions
How many tablespoons are in a gram of coffee?
Roughly 1 tablespoon of ground coffee weighs 5 to 7 grams, but it varies significantly by roast level and grind size. We use ~6 g per tablespoon for our estimates.
Why does my coffee taste bitter?
Bitterness is usually due to over-extraction. Try a coarser grind or increase your ratio (more water relative to the amount of coffee).