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The exact grounds-to-water measurements for auto-drip machines. Works for Mr. Coffee, Cuisinart, Moccamaster, and every standard drip brewer.
Quick answer
The standard drip coffee ratio is 1:15 — that is 1 gram of coffee to 15 grams (ml) of water, or roughly 2 tablespoons per 6oz cup. For stronger drip coffee, use 1:13. For a lighter cup, use 1:17.
Coffee
47
grams
Water
708
ml
Ratio
1:15
standard
Brew note: Balanced extraction. If too sour → grind finer. If too bitter → grind coarser.
Medium (table salt) · 195-205°F (90-96°C) · 4-6 minutes
| Cups | Water | Coffee (g) | Coffee (tbsp) | Ratio |
|---|---|---|---|---|
| 1 cup | 177 ml | 12 g | 2 tbsp | 1:15 |
| 2 cups | 354 ml | 24 g | 4 tbsp | 1:15 |
| 4 cups | 708 ml | 47 g | 9 tbsp | 1:15 |
| 6 cups | 1062 ml | 71 g | 13 tbsp | 1:15 |
| 8 cups | 1416 ml | 94 g | 18 tbsp | 1:15 |
| 10 cups | 1770 ml | 118 g | 22 tbsp | 1:15 |
| 12 cups | 2124 ml | 142 g | 27 tbsp | 1:15 |
Drip coffee makers work by gravity — heated water drips through a bed of ground coffee at a pace the machine controls. You don't control brew time, water flow, or agitation the way you do with a french press or pour over. The only variables you fully control are the amount of coffee, the grind size, and the water volume.
At a 1:15 ratio with a medium grind, the water has enough contact time with the grounds to extract the sugars, acids, and oils that produce a balanced cup. Go below 1:13 and the brew becomes thick, bitter, and over-extracted — the water can't physically dissolve more flavor compounds without also pulling harsh tannins. Go above 1:17 and the water passes through too quickly relative to the amount of coffee, producing a thin, sour, under-extracted cup.
The Specialty Coffee Association certifies machines that hold water temperature between 195-205°F and complete the brew cycle in 4-8 minutes. If your machine hits those marks, a 1:15 ratio will land squarely in the optimal extraction yield of 18-22%.
Not everyone owns a kitchen scale, and that's fine. A level tablespoon of medium-ground coffee weighs approximately 5-6 grams, depending on grind size and roast level. Two level tablespoons — or one standard coffee scoop — gives you roughly 10-12 grams, which is the right amount for one 6oz cup at a 1:15 ratio.
The reason gram measurements are more reliable is density variation. A tablespoon of finely ground dark roast packs more mass than a tablespoon of coarsely ground light roast. If you switch beans frequently, a $20 kitchen scale removes the guesswork entirely. If you stick to one brand and grind setting, tablespoons will give you consistent results once you dial in your preferred amount.
Using the cup markings on the carafe. Machine manufacturers define a "cup" anywhere from 4oz to 6oz. A "12-cup" Mr. Coffee makes 60oz of coffee, not 96oz. Always measure actual water volume rather than trusting the printed lines.
Pre-ground coffee that's too fine. If your drip coffee is consistently bitter and the pot takes longer than 8 minutes to brew, the grind is too fine. The water can't flow through the bed efficiently, causing over-extraction. Switch to a medium grind — it should feel like table salt between your fingers.
Not cleaning the machine. Mineral buildup in the heating element reduces water temperature, and old coffee oils on the basket turn rancid. Run a 1:1 white vinegar and water cycle monthly, followed by two plain water cycles to rinse. Your coffee will taste noticeably better.
Leaving coffee on the hot plate. Coffee degrades rapidly on a warming plate — the heat drives off volatile aromatics and accelerates oxidation. If you aren't drinking the pot within 20 minutes, brew into a thermal carafe instead.
Have a specific question? “How much coffee for my 34oz Bodum?” or “Why does my cold brew taste weak?”
Coming soon
For 12 cups of drip coffee (72oz / 2130ml), use 24 level tablespoons (about 142g) of medium-ground coffee at a standard 1:15 ratio. If you prefer stronger coffee, increase to 27 tablespoons (1:13 ratio).