For drip coffee and pour-over, a reliable starting point is 1:16.7 – one gram of coffee for every 16.7 grams of water. That works out to about 14 grams of coffee for 8 fluid ounces (237 ml) of water, or 60 grams per liter.
You don’t have to treat that number as a hard and fast rule. For drip coffee and pour-over, a practical range is 1:15 for a stronger cup, 1:16.7 for a balanced starting point, and 1:18 for a milder cup.
The recommended starting ratio varies by brewing method. The calculator below starts drip and pour-over at 1:16.7, French press at 1:18.3, and AeroPress at 1:16.
Coffee-to-water ratio calculator
Use this formula when you know how much water you want to brew:
Water in ounces × 29.57 ÷ ratio number = coffee in grams
For example, 16.9 fluid ounces (500 ml) of water at 1:16.7 needs about 30 grams of coffee. The calculator handles the conversion, so you don’t have to do arithmetic before coffee has turned on your brain.
1. Select brew type:
2. How many Servings?
Amount of Water needed:
Amount of Coffee needed:
Coffee Grind:
How to brew:
Here's a little timer for your french press brew
TIME : 4:00
Coffee-to-water ratio chart
The chart below uses the drip and pour-over starting ratio of 1:16.7, equivalent to 60 grams of coffee per liter. The dose is the coffee’s weight before brewing, whether you start with whole beans or grounds.
| Water | Coffee | Approximate ratio |
|---|---|---|
| 8.5 fl oz (250 ml) | 15 g | 1:16.7 |
| 11.8 fl oz (350 ml) | 21 g | 1:16.7 |
| 16.9 fl oz (500 ml) | 30 g | 1:16.7 |
| 25.4 fl oz (750 ml) | 45 g | 1:16.7 |
| 33.8 fl oz (1,000 ml) | 60 g | 1:16.7 |
| 42.3 fl oz (1,250 ml) | 75 g | 1:16.7 |
How much coffee grounds per cup?
“One cup” can mean several different things. A US measuring cup is 8 fluid ounces, a typical mug may hold 10 to 12 ounces, and many drip-machine markings represent only 5 or 6 fluid ounces. Apparently, the coffee world decided that “cup” should be more of a suggestion than a measurement.
For that reason, the most accurate approach is to measure the water you’ll actually use.
| Finished size | Water | Coffee at 1:16.7 |
|---|---|---|
| Small cup | 6 fl oz (177 ml) | 10.5-11 g |
| Standard cup | 8 fl oz (237 ml) | 14 g |
| Medium mug | 10 fl oz (296 ml) | 18 g |
| Large mug | 12 fl oz (355 ml) | 21 g |
| Travel mug | 16 fl oz (473 ml) | 28 g |
If you’re brewing one ordinary 8-ounce cup, start with about 14 grams of coffee. For a 12-ounce mug, start with about 21 grams.
How many tablespoons of coffee per cup?
A scale is more reliable than a tablespoon because roast level, grind size, and how tightly you fill the spoon all change the weight. Coffee grounds have an annoying habit of fitting differently into every scoop. If tablespoons are all you have, use these as practical starting points:
- 6 fluid ounces of water: about 2 level tablespoons
- 8 fluid ounces of water: about 2½ level tablespoons
- 12 fluid ounces of water: about 3½ to 4 level tablespoons
Treat those as approximate measurements, then adjust to taste. Don’t pack the grounds into the spoon.
How much coffee should you use in a coffee maker?
First check what your machine means by a “cup.” The numbered lines on the carafe often don’t represent 8-ounce measuring cups. A “12-cup” coffee maker is rarely volunteering to fill twelve large mugs, which feels a little optimistic of the label. If the manual gives the machine’s full water capacity, use that figure.
The following chart uses the 1:16.7 drip-coffee starting ratio and two common carafe conventions. Tablespoons are approximate because the weight of a level tablespoon changes with the roast, grind, and how the spoon is filled.
| Coffee-maker setting | Coffee if each cup is 5 fl oz | Coffee if each cup is 6 fl oz |
|---|---|---|
| 4 cups | 35 g (about 6½ tbsp) | 43 g (about 8 tbsp) |
| 6 cups | 53 g (about 9½ tbsp) | 64 g (about 11½ tbsp) |
| 8 cups | 71 g (about 13 tbsp) | 85 g (about 15½ tbsp) |
| 10 cups | 89 g (about 16 tbsp) | 106 g (about 19 tbsp) |
| 12 cups | 106 g (about 19 tbsp) | 128 g (about 23 tbsp) |
How much coffee for 12 cups?
For a 12-cup drip machine, use about 106 grams (about 19 level tablespoons) if the carafe’s “cup” equals 5 fluid ounces. Use about 128 grams (about 23 level tablespoons) if each marked cup equals 6 fluid ounces.
If you don’t know which convention your machine uses, fill it to the 12-cup line and measure the water in fluid ounces. Enter that amount in the calculator and select Drip/Pour Over. That one check is more dependable than assuming every 12-cup coffee maker holds the same amount.
Strong versus mild coffee ratios
Each brewing method has its own suggested starting ratio. Once you select that method in the calculator, changing the dose is the cleanest way to adjust strength while keeping the brewer, grind, water temperature, and brew time the same. The table below shows a useful adjustment range for drip coffee and pour-over.
| Taste target for drip/pour-over | Coffee-to-water ratio | Coffee for 8 fl oz (237 ml) |
|---|---|---|
| Stronger | 1:15 | 16 g |
| Balanced starting point | 1:16.7 | 14 g |
| Milder | 1:18 | 13 g |
For drip coffee and pour-over, if the cup is too weak, move from 1:16.7 toward 1:15 by adding a little more coffee. If it’s too strong, move toward 1:18 by using a little less.
Change one variable at a time. If you alter the ratio, grind, water temperature, and brew time together, you won’t know which change improved the cup.
Is there one perfect coffee ratio?
No single ratio will taste perfect with every bean, grinder, brewer, and palate. The Specialty Coffee Association’s home-brewer requirements refer to a Gold Cup dose of about 13 grams per 8 fluid ounces (237 ml), equivalent to approximately 55 grams per liter. Many practical drip and pour-over recipes use about 14 grams per 8 fluid ounces (237 ml), or 60 grams per liter.
That’s why 60 g/L is a useful starting point rather than a hard and fast rule. Brew once, taste, and adjust the coffee dose in small steps.
Coffee ratio by brewing method
Drip coffee maker
Start at 1:16.7. For 12 fluid ounces (355 ml) of water, use about 21 grams of coffee. Confirm the true volume behind your machine’s carafe markings before calculating the dose.
Pour-over
Start at 1:16.7. For 12 fluid ounces (355 ml) of water, use about 21 grams of coffee. Keep the ratio steady while you tune grind size and pouring technique.
French press
Start at 1:18.3, matching the Specialty Coffee Association’s published guidance of 36 grams of coffee for 22 fluid ounces (660 ml) of water. For 12 fluid ounces (355 ml), use about 19 grams. Adjust to taste rather than assuming French press must always be extremely strong.
AeroPress
Start at 1:16 for a ready-to-drink AeroPress cup. For 12 fluid ounces (355 ml) of total brew water, use about 22 grams of coffee. Some AeroPress recipes make a concentrate and add bypass water after pressing, so count that added water in the final total.
Cold brew
Cold-brew recipes vary depending on whether you want a drink served straight or a concentrate you’ll dilute later. Don’t use the hot-brew chart automatically.
See the dedicated cold-brew coffee ratio guide for the appropriate recipe and dilution instructions.
How to fix coffee that tastes too weak or too strong
If the coffee is brewed correctly but the strength is wrong:
- Keep the beans, grind size, water, temperature, and brew time the same.
- Change only the coffee dose.
- Adjust by about 1 to 2 grams per 8 fluid ounces (237 ml) of water.
- Write down the dose you preferred.
If the cup tastes bitter, sour, burnt, stale, or otherwise unpleasant, the ratio may not be the only problem. Grind size, extraction time, water temperature, bean freshness, and clean equipment all matter.
Use the complete bad-tasting coffee guide to diagnose the flavor before changing everything at once.
The easiest ratio to remember
60 grams of coffee for every liter of water – approximately 1:16.7.
For one 8-ounce cup, that is about 14 grams of coffee. For a larger batch, measure the actual water capacity instead of trusting the word “cup.” Use the calculator to adjust the dose slightly stronger or milder until the coffee tastes right to you.
