Coffee to Water Ratio Calculator
Dial in perfect coffee every time. Pick your brew method and strength, tell us how much water you're using, and this coffee to water ratio calculator gives you the exact grams of coffee you need — plus a rough tablespoon equivalent.
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Coffee needed by method and strength
| Brew method | Mild | Standard | Strong |
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How to use this calculator
Start with your water: enter how much coffee you want to brew (2 cups is the default) and choose your unit — cups, fluid ounces, or milliliters. Then pick your brew method: drip, pour over, French press, or cold brew concentrate.
Choose a strength — Mild for an easy-drinking cup, Standard for the classic balanced recipe, or Strong for a bolder mug. The result appears instantly: grams of coffee, your water converted to milliliters and fluid ounces, an approximate tablespoon equivalent, and a comparison table showing how much coffee each method and strength would need for the same amount of water.
How it works
Coffee recipes are written as ratios by weight — for example, 1:16 means one part coffee to sixteen parts water. The "golden ratio" of 1:16 is the most widely recommended starting point for drip coffee, and pour over uses the same range. French press brewing, with its coarser grind and full-immersion style, tastes best a little stronger, around 1:14. Cold brew concentrate goes much stronger (1:5) because you dilute it with water or milk before drinking.
The math is simple: your water is converted to milliliters (1 fl oz = 29.5735 ml, 1 cup = 236.588 ml), then divided by the ratio's second number to get grams of coffee. So 473 ml of water at 1:16 needs about 29.6 g of coffee.
Grams beat spoons for consistency. A tablespoon of coffee can weigh anywhere from 7 to 13 grams depending on the roast and grind, so the tablespoon figure here (about 1 tbsp ≈ 10 g) is only a rough guide — a cheap kitchen scale will make your morning cup noticeably more repeatable.
Frequently asked questions
What is the golden ratio for coffee?
The widely recommended "golden ratio" for drip coffee is about 1:16 — one part coffee to sixteen parts water by weight. That is roughly 14.8 grams of coffee per 8 fl oz (236 ml) cup of water. Pour over uses the same ratio; French press runs a bit stronger at 1:14.
Should I measure coffee in grams or tablespoons?
Grams, weighed on a kitchen scale, are more accurate. A tablespoon of coffee can weigh anywhere from 7 to 13 grams depending on roast level and grind size, so spoon measurements can swing your brew strength by a third or more. This calculator uses about 1 tablespoon ≈ 10 grams as a rough conversion.
What ratio for French press?
A standard French press ratio is 1:14 — one part coffee to fourteen parts water. Try 1:15 for a milder cup or 1:12 for a stronger, more full-bodied brew. French press uses a coarser grind than drip, so slightly more coffee per unit of water keeps the cup from tasting thin.
How much coffee per cup?
For one standard 8 fl oz (236 ml) cup at the classic 1:16 ratio, use about 14.8 grams of coffee — roughly 1.5 tablespoons. A 12 fl oz mug takes about 22 grams (just over 2 tablespoons). Pick your brew method and strength in the calculator above for exact amounts.
Cold brew vs regular ratio?
Cold brew concentrate is brewed much stronger than regular coffee, typically 1:4 to 1:6, because you dilute it with water or milk before drinking — often 1 part concentrate to 1 or 2 parts water. Regular hot-brew methods use 1:12 to 1:17. This calculator gives you the concentrate amount; dilute it to taste.