Coffee Ratio Calculator
Calculate the perfect coffee-to-water ratio for any brew method and serving size.
Brew method ratios at a glance
| Brew Method | Weak | Standard | Strong | Grind Size |
|---|---|---|---|---|
| Filter / Drip | 1:17 | 1:15 | 1:13 | Medium |
| French Press | 1:15 | 1:13 | 1:11 | Coarse |
| Espresso | 1:3 | 1:2.5 | 1:2 | Fine |
| Pour Over (V60) | 1:16 | 1:15 | 1:13 | Medium-Fine |
| Cold Brew | 1:10 | 1:8 | 1:6 | Coarse |
| South Indian Decoction | 1:6 | 1:5 | 1:4 | Fine-Medium |
| Moka Pot | 1:8 | 1:7 | 1:6 | Fine-Medium |
Frequently asked questions
What is the golden ratio for coffee?
The Specialty Coffee Association recommends 55g of coffee per litre of water (1:18) as a baseline for filter coffee. Most home brewers prefer 1:15 to 1:16 for a balanced cup. South Indian filter coffee uses a stronger decoction (1:4 to 1:6) which is then diluted with hot milk.
How is South Indian filter coffee different?
South Indian filter coffee uses a metal filter device. Ground coffee (with chicory) is placed in the top chamber, and hot water is poured over it. The decoction drips slowly and is mixed 1:1 to 1:2 with hot milk and sugar.
Does the ratio change for cold brew?
Yes — cold brew uses a much higher coffee-to-water ratio (1:6 to 1:8) because it is brewed cold for 12–24 hours and served diluted. If making concentrate, use 1:4; then dilute 1:1 with water or milk when serving.
What grind size should I use?
Grind size affects extraction. A coarser grind needs more contact time (French press, cold brew). A finer grind extracts faster (espresso, South Indian filter). Wrong grind size for the method leads to over- or under-extraction, making coffee bitter or sour.
How many grams of coffee is a teaspoon?
One level teaspoon of ground coffee is approximately 2–3g. One tablespoon is about 6–8g. Measuring by weight is more consistent — a kitchen scale gives the best results, especially for espresso.