Coffee Brew Ratio Calculator
Calculate how much coffee and water to use for pour-over, French press, AeroPress, Chemex, drip, moka pot, cold brew or espresso — from the water you have, the coffee you have, or the cups you want — with grams, ounces, tablespoons and a grind/temperature/time brew guide.
Input
Output
| Item | Value |
|---|---|
| No data yet | |
More ways to use this tool
REST API
curl -X POST https://api.iotools.cloud/v1/tool/coffee-brew-ratio-calculator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"method": "pour-over",
"strength": "standard",
"solveFrom": "water",
"amount": "350",
"waterUnit": "ml"
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `coffee-brew-ratio-calculator` tool (Coffee Brew Ratio Calculator) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.
Embed widget
<iframe
src="https://iotools.cloud/embed/coffee-brew-ratio-calculator/"
width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
title="Coffee Brew Ratio Calculator — iotools.cloud"
sandbox="allow-scripts allow-forms allow-same-origin allow-downloads allow-popups allow-popups-to-escape-sandbox"
allow="clipboard-write"
style="width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden"></iframe>
<script src="https://iotools.cloud/embed.js" async></script>Drop this into your own page — free, no key required, just a link back.
| Cost per API/MCP call | From 5 credits |
|---|---|
| Need more credits? | View pricing |
Also available with
Guides
What does this tool do?
The coffee-to-water ratio decides most of what ends up in your cup. Too little coffee tastes thin and sour, too much tastes heavy and bitter. This calculator works out the right amounts for your brewer. Pick a method, say what you already know (the water, the coffee on hand, or the number of cups you want), and it gives you the coffee dose, the brew water and roughly how much coffee you'll end up drinking. Each amount appears in grams, ounces and tablespoons, or in milliliters and fluid ounces, next to a short brew guide for that method.
Standard ratios by brew method
| Method | Ratio | Grind |
|---|---|---|
| Pour-over (V60, Kalita) | 1:16 | Medium-fine |
| Chemex | 1:17 | Medium-coarse |
| French press | 1:15 | Coarse |
| AeroPress | 1:14 | Medium-fine |
| Drip coffee maker | 1:17 | Medium |
| Moka pot | 1:10 | Fine |
| Turkish / cezve | 1:10 | Extra-fine |
| Cold brew concentrate | 1:5 | Extra-coarse |
| Cold brew, ready to drink | 1:8 | Extra-coarse |
| Espresso | 1:2 (dose : yield) | Fine |
A ratio of 1:16 means 16 g of water for every gram of coffee. Water weighs 1 g per mL, so 1:16 is also 16 mL per gram. These are starting points. Use the Strength option to go about 12% milder or stronger, or pick Custom ratio and enter your own.
Why "cups" gives you more water than you'd expect
Spent grounds hold on to about twice their weight in water, and that water never reaches the cup. If you ask for four 8 oz mugs, the calculator works backwards from the coffee you want to drink and adds the absorbed water. That way the pot actually fills four mugs. The Estimated brewed coffee row shows this for every direction.
Espresso is the exception. Its ratio is already measured in the cup (18 g in, 36 g out), so the calculator shows the beverage yield in grams and skips the absorption step.
How to use it
- Choose a Brew method. Its standard ratio is shown next to the name.
- Set Strength to mild, standard or strong.
- Under I know…, choose water, coffee or cups, then enter the Amount and unit.
- Read the dose, water, brewed yield, grind size, water temperature and brew time from the breakdown, or copy or download it as CSV.
FAQ
How many tablespoons of coffee per cup?
At a typical 1:16 ratio, an 8 oz (237 mL) mug of brewed coffee takes about 17 g of coffee, roughly 3½ level tablespoons. The calculator assumes about 5 g of ground coffee per level tablespoon. Grind size and roast change that a little, so a kitchen scale gives the most consistent results.
Is a coffee-maker "cup" the same as a mug?
No. Most drip machines mark cups at 5–6 fl oz, while a typical mug holds 8–12 fl oz. That's why the Cup size option lists the 6 oz coffee-maker cup separately.
Related tools
To turn grams into cups or ounces for other ingredients, use the Cooking Measurement Converter. To convert brew temperatures between °C and °F, try the Temperature Converter.
Everything is calculated in your browser, with no sign-up and nothing sent to a server.