Coffee to Water Ratio
Calculate the perfect coffee to water ratio for pour over, French press, and cold brew. Free coffee ratio calculator with strength selection, charts, and detailed breakdowns.
About This Calculator
The Coffee to Water Ratio Calculator helps you find the perfect balance of coffee grounds and water for your preferred brewing method. Whether you use a pour over dripper, French press, or make cold brew concentrate, getting the ratio right is essential for a delicious cup of coffee.
This calculator supports three popular brewing methods with industry-standard ratios. For pour over and drip coffee, the Specialty Coffee Association (SCA) recommends a 1:18 ratio (0.055 g coffee per 1 ml water). Our calculator uses 1:17 for regular and 1:15 for strong pour over coffee. French press requires a coarser grind and typically uses 1:17 for regular or 1:11 for a bold cup. Cold brew concentrate needs the most coffee — 1:8 for regular strength and 1:5 for a concentrate that can be diluted with water or milk when serving.
The formula is straightforward: multiply your coffee weight by the ratio to get your water volume, or divide your water volume by the ratio to get the coffee weight needed. Water has a density of approximately 1 g/ml, making weight and volume measurements interchangeable for water. Coffee should always be weighed for accuracy — one tablespoon of ground coffee averages 5-7 grams depending on grind size.
Regional Notes
India: Coffee culture varies by region — South Indian filter coffee uses a strong decoction typically made with a 1:10 to 1:12 ratio, often mixed with hot milk and sugar.
United States: Standard coffee makers typically recommend 1-2 tablespoons of coffee per 6 oz (180 ml) water. The "Golden Ratio" of 1:18 (55 g coffee per liter of water) is widely cited by the SCA and National Coffee Association.
United Kingdom: Cafetière (French press) is the most popular home brewing method. A standard mug is 250-300 ml, and a common recommendation is one heaped tablespoon of coarsely ground coffee per mug.
Frequently Asked Questions
What is the best coffee to water ratio for pour over coffee?
The Specialty Coffee Association recommends a 1:18 ratio (0.055 g coffee per 1 ml water) for pour over coffee. For a stronger cup, use a 1:15 ratio. Our calculator uses 1:17 for regular and 1:15 for strong pour over coffee.
What coffee to water ratio should I use for French press?
French press typically requires a stronger ratio than pour over. Use 1:17 for regular strength and 1:11 for a bold, full-bodied French press coffee. The coarser grind used in French press needs more coffee to extract properly.
How much coffee and water do I need for cold brew?
Cold brew requires a much higher coffee concentration. Use a 1:8 ratio for regular cold brew and 1:5 for a strong concentrate that can be diluted with water or milk when serving. Cold brew steeps for 12-24 hours at room temperature.
Is the coffee to water ratio measured by weight or volume?
The ratio is measured by weight for accuracy. Water has a density of approximately 1 g/ml, so 1 ml of water equals roughly 1 gram. Coffee should always be weighed rather than measured by volume because grind size and compaction affect volume significantly.
How many grams of coffee are in a tablespoon?
One tablespoon of ground coffee weighs approximately 5-7 grams, depending on the grind size and coffee bean density. For accurate results, always use a kitchen scale rather than volumetric measurements for coffee.
What water temperature is best for brewing coffee?
The ideal water temperature for brewing coffee is between 195°F and 205°F (91-96°C). Water that is too hot can over-extract and cause bitterness, while water that is too cool will under-extract and produce weak, sour coffee.
How long should I brew pour over coffee?
Pour over coffee typically takes 2.5 to 4 minutes total brew time, depending on the grind size, water temperature, and amount of coffee. The water should be poured in stages, allowing the coffee to bloom for 30 seconds before continuing.