Coffee Ratio Calculator

Popular Brewing Method

Choose Drink Size

Brew Strength

Roast Level

How to Use the Coffee Ratio Calculator

Select your brewing method
Choose from Drip, Pour Over, French Press, Espresso, and more. Each method automatically adjusts grind size and brew time.
Set your drink size
Pick the number of cups or enter a custom amount (e.g., 1.5 cups).
Choose brew strength
Decide how bold you want your coffee — Mild, Balanced, Strong, or Robust.
Each option uses a precise coffee-to-water ratio.
Select roast level
The calculator recommends the ideal water temperature for your roast — from Light to Dark.
Click “Calculate Ratio”
Instantly see your coffee and water amounts, grind size, and brewing instructions.
Copy, Share, or Download
- Copy → Copy your recipe text.
- Share → Send your recipe to friends or social media.
- Download → Save a PNG recipe card.

💡 Tip: Switch between grams and ounces anytime with the “Switch to oz / grams” button.

Use a formula like 1 : x (one part coffee to x parts water).

If you choose a ratio of 1:15, it means 1 g of coffee → 15 g (or mL) of water.
For example, 20 g coffee × 15 = 300 g (or mL) water.
This approach lets you scale the recipe up or down without losing balance.

The generally accepted range is 195-200 °F (≈ 90-93 °C).

Lower than ~195 °F (~90 °C), extraction may be weak or sour.
Higher than ~200 °F (~93 °C), you risk extracting undesirable bitter compounds.
Staying in that range helps ensure you extract desirable compounds without too much bitterness or under-extraction.

Roast Level	Recommended Temperature	Reason / Notes
Light Roast	~ 197–200 °F (92–93 °C)	Light roasts are denser, so a slightly higher temperature helps pull flavors.
Medium Roast	~ 195–198 °F (90–92 °C)	Balanced roast; mid-temperature ensures balance between acidity and sweetness.
Dark Roast	~ 195 °F (≈ 90 °C)	Dark roasts extract faster, so a slightly cooler temperature helps prevent over-extraction and bitterness.

Method	Typical Ratio Range	Common Use / Notes
Pour-over / Drip	1:15 → 1:17	Balanced and clean flavors
French Press / Immersion	1:13 → 1:15	Full body, steady contact
Espresso / Concentrated	~ 1:2	Highly concentrated under pressure
Cold Brew (Ready to Drink)	~ 1:8	Stronger ratio for long, low-temp brew
Cold Brew (Concentrate)	~ 1:4	To be diluted later

If your coffee tastes too strong or too weak, simply select another brew strength in the calculator and it will rebalance your ratio instantly.

Lower ratio (e.g. 1:13) → more coffee per water → stronger, heavier body, more intense flavor, but risk of over-extraction (bitterness) if other factors aren’t adjusted.
Higher ratio (e.g. 1:17 or 1:18) → lighter, cleaner flavor, but potential for under-extraction (sour, weak) if not enough solubles are pulled.
The brew ratio is a primary lever controlling brew strength (concentration) and influences how extraction happens.

Yes — roast affects extraction speed:

The Coffee Fuze Coffee Ratio Calculator automatically fine-tunes water temperature based on roast level (e.g., Dark: 185–195°F, Light: 200–205°F).

Digital scale (0.1 g accuracy or better) for coffee and water
Temperature-controlled kettle to hit target temps reliably
Timer to maintain consistent brew time
Burr grinder for uniform particle size
Refractometer / TDS meter (for advanced users) to measure brew strength and estimate extraction yield

Issue	Adjustment Strategies
Sour / weak	Tighten ratio (more coffee or less water), increase temp slightly, use finer grind
Bitter / harsh	Loosen ratio (more water), lower temp, use coarser grind
Inconsistent results	Change only one variable at a time and keep brewing logs for pattern

Use freshly ground beans, filtered water, and pre-heated equipment.
Maintain a steady temperature throughout brewing to extract sweetness and clarity.
Freshness, grind consistency, and temperature control are just as important as ratio precision.