Coffee Calculator: Coffee-to-Water Ratio
Maryna Gray
• April 09, 2021 — last updated June 15, 2026
Getting the coffee-to-water ratio right is the difference between a cup you love and one you put up with. But measuring coffee is a confusing topic, and "how much coffee per cup" doesn't have one tidy answer. Grams or milliliters? Ounces or scoops? What if you like it strong, or you don't own a scale? Set your brew method and strength below and the calculator does the math for you. Underneath it you'll find quick-answer charts and the few rules actually worth remembering.
Coffee calculator: coffee-to-water ratio
| measuring cups | 0.28 |
| ounces | 2.25 |
| grams | 63.78 |
| tablespoons | 4.5 |
| teaspoons | 13.5 |
| scoops | 2.25 |
| measuring cups | 4.5 |
| fluid ounces | 36 |
| "cup" lines on pot | 6 |
| milliliters | 1064.64 |
The quick answer: ratio by brew method
Every brew method has a sweet-spot ratio of water to coffee. Here are the standards the calculator uses, by weight, so 16:1 means 16 grams of water for every 1 gram of coffee.
| Brew method | Water-to-coffee ratio | What you get |
|---|---|---|
| Drip | 16:1 | The everyday standard, clean and balanced |
| Pour-over (V60) | ~17:1 | Bright and clean |
| Chemex | 16:1 | Clean with a fuller body |
| French press | 12:1 | Bold, full-immersion |
| AeroPress | ~6:1 | A concentrate, dilute to taste |
| Moka pot | ~10:1 | Strong, espresso-style |
| Cold brew | ~10:1 | A concentrate, dilute about 1:1 with water or milk |
How much coffee per cup (drip)
For everyday drip or pour-over at the standard 1:16 ratio and a regular strength, here's how much ground coffee to use, measured for a 6-ounce cup. Want it stronger, or brewing into bigger mugs? Adjust the calculator above and it re-runs the numbers.
| Cups (6 oz) | Coffee (grams) | Coffee (tablespoons) | Water (fl oz) |
|---|---|---|---|
| 1 | 11 g | 2 | 6 |
| 2 | 21 g | 4 | 12 |
| 4 | 43 g | 8 | 24 |
| 6 | 64 g | 12 | 36 |
| 8 | 85 g | 16.5 | 48 |
| 10 | 106 g | 20.5 | 60 |
| 12 | 128 g | 24.5 | 72 |
One level tablespoon of ground coffee weighs roughly 5 grams, so about 2 tablespoons per 6-ounce cup. A standard coffee scoop is about 2 tablespoons, which makes one scoop per cup an easy starting point you can adjust to taste.
Grams, scoops, or tablespoons?
You don't need a scale. Scoops, measuring cups, and spoons all work fine for everyday brewing. A scale just makes you more consistent, because coffees vary in density and weight: a scoop of light-roast coffee typically weighs more than the same scoop of dark-roast coffee. If you want repeatable cups, weigh in grams. If you just want a good cup, count tablespoons.
There are also two kinds of "cups" worth knowing about: the measuring cup that holds 8 fluid ounces, and the coffee cup you drink from, which holds about 6 ounces (mugs hold closer to 8). The calculator lets you switch between them so the numbers match whatever you're actually pouring into.
A few rules for a better cup
The ratio is only half the story. Three habits do as much for your coffee as any measurement:
- Use filtered water. Coffee is mostly water, so off-tasting water means off-tasting coffee.
- Buy fresh, whole beans. Freshness is the single biggest lever for flavor, and stale coffee tastes flat no matter how carefully you measure.
- Grind right before you brew. Ground coffee goes stale within minutes.
And if a cup ever tastes thin or sour, you probably used too little coffee; if it tastes harsh and bitter, too much, or your grind is too fine. The ratio above is your anchor, and you can brew stronger by adding coffee rather than reducing water.
Freshness, as always, is the lever the ratio can't fix on its own. You can build a coffee subscription and we'll send fresh-roasted coffee from dozens of independent US roasters, picked to your taste, so the beans you're measuring are always at their best.
Frequently asked questions
How much coffee should I use per cup? About 2 level tablespoons, roughly 10 to 11 grams, of ground coffee per 6-ounce cup at the standard 1:16 ratio. Scale up from there for more cups.
What is the best coffee-to-water ratio? A 1:16 ratio (1 gram of coffee to 16 grams of water) is the standard for drip and pour-over. Go richer, around 1:12, for a bolder french press, and use the strength setting in the calculator to fine-tune.
How many tablespoons of coffee per cup? About 2 level tablespoons per 6-ounce cup. A standard coffee scoop holds roughly 2 tablespoons, so one scoop per cup is an easy rule of thumb.
Do I need a scale to brew good coffee? No. Scoops and spoons work fine. A scale only helps with consistency, since coffees differ in density, so a scoop of light roast weighs more than the same scoop of dark.
What's the ratio for a french press? About 12:1 water to coffee, a touch stronger than drip because it's full-immersion. For 4 six-ounce cups, that's roughly 40 grams of coffee.
What's the ratio for pour-over? Around 16:1 to 17:1 for drip, Chemex, and V60, the same everyday standard as a drip machine.
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