What is the golden ratio for coffee?

The Specialty Coffee Association (SCA) recommends 1:17 (1 gram of coffee per 17 ml of water) as the standard brewing ratio, though 1:15 to 1:17 is the most common specialty range. Espresso uses a much stronger 1:2 ratio.

How much coffee do I use for a French press?

A standard French press ratio is 1:15 — about 67 grams of coffee per 1000 ml of water. For a typical 350 ml (12 oz) press, use around 23 grams of coarsely ground coffee.

Why does brewing method change the ratio?

Different methods extract at different efficiencies. Espresso uses high pressure over a short time, requiring a much stronger ratio (1:2). Cold brew steeps for 12–24 hours and uses 1:8. Drip and pour-over fall in the 1:15–1:17 range for a balanced extraction.

Should I measure coffee by weight or volume?

Weight (grams) is always more accurate. Coffee grind density varies — a tablespoon of coarse French press grind weighs less than a tablespoon of fine espresso grind. A scale eliminates this inconsistency.

What ratio makes the strongest coffee?

A lower ratio number means more coffee per water, so 1:10 is stronger than 1:17. Cold brew concentrate typically uses a 1:4–1:5 ratio and is diluted before drinking. Espresso at 1:2 is the most concentrated common brew.

How many tablespoons of coffee per cup?

A standard guideline is 1–2 tablespoons (6–12 g) of ground coffee per 6 fl oz (180 ml) cup, which approximates a 1:15–1:30 ratio. For best results, weigh your coffee rather than measuring by volume.

Coffee To Water Ratio Calculator

Name: Coffee To Water Ratio Calculator
Availability: InStock
Author: Nham Vu

Enter your brewing method, coffee amount, or water volume to instantly get the ideal ratio and missing value for a perfect brew.

Brew Settings

Brewing Method

Strength Adjustment Balanced

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Coffee Amount (grams)

Brew Results

Adjust settings above and click Calculate.

Common Brew Ratios (Coffee : Water)

Method	Ratio	Coffee / 300 ml	Strength

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Summary

Enter your brewing method, coffee amount, or water volume to instantly get the ideal ratio and missing value for a perfect brew.

How it works

Select your brewing method from the dropdown.
Choose whether to calculate by coffee weight or water volume.
Enter the amount you know (grams of coffee or milliliters of water).
The calculator instantly shows the other value and the full ratio.
Adjust the ratio strength slider to customize from weak to strong.
Use the cups converter to think in cups instead of milliliters.

Use cases

Brew pour-over coffee with the exact 1:15 specialty coffee ratio.
Calculate how much ground coffee to use for a full French press pot.
Dial in an espresso shot using the standard 1:2 brew ratio.
Scale a recipe when brewing for multiple guests.
Convert between grams and cups for drip coffee makers.
Compare ratios across brewing methods to understand flavor differences.
Help beginners learn consistent brewing fundamentals.
Quickly adjust strength without memorizing different ratios.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu