Kitchen / Coffee
Coffee Ratio Calculator
How much coffee and water for pour-over, French press, AeroPress, drip, moka pot, cold brew, or espresso, with the grind, water temperature, and a brew timer.
Coffee Ratio Calculator: Brew ratios compare the weight of coffee with the weight of water: 1:16 means 16 g of water for each gram of coffee. Weighing gives far more consistent coffee than spoons, because beans and grinds differ in density. Each method starts from a common ratio, and the page gives a typical grind, temperature, and time; espresso is given as coffee to drink in the cup, as baristas measure it. Runs 100% locally in your browser with zero server file uploads.
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- Home & family tools
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18.8 g coffee and 300 g water
- Grind
- Medium-fine
- Water temperature
- 92–96 °C (198–205 °F)
- Time
- Bloom for 30–45 s, then pour in stages; about 3–4 min in all
Water is weighed: 1 g of water is 1 ml. These are starting points; if the coffee tastes sour or thin, use a finer grind or less water; if bitter, a coarser grind or more water.
Dialling in
Change one thing at a time. Grind size changes extraction most: finer extracts more, giving a stronger, more bitter cup, while coarser gives a lighter, sometimes sour one. Then adjust the ratio for strength. Use the stopwatch to keep brew times consistent between attempts.
Water
Coffee is about 98% water, so water that tastes good on its own makes better coffee. Very hard water dulls the flavour and scales machines; filtered water is an easy improvement.
How to use it
- Choose your brew method; the usual ratio is filled in, and you can change it.
- Enter the water you want, or the coffee you have.
- Read the amounts, grind, and water temperature, and start the timer as you pour.
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Frequently asked questions
What is the best coffee to water ratio?
Between 1:15 and 1:17 suits most filter coffee, with 1:16 a good start. The Specialty Coffee Association's golden ratio is 55 g of coffee per litre of water, about 1:18. Use less water for a stronger cup.
How much coffee for one cup?
For a 250 ml mug at 1:16, about 15–16 g of coffee, roughly two level tablespoons of ground coffee, though spoons vary with the grind.
What ratio for cold brew?
A concentrate at about 1:5 to 1:8, steeped 12 to 18 hours in the fridge, then diluted about one to one with water or milk. For ready-to-drink cold brew, use about 1:12 to 1:15 and do not dilute.
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