Coffee to Water Ratio: How Much Coffee Per Cup (Chart)
What Is the Best Coffee to Water Ratio?
The best coffee-to-water ratio for most filter and immersion brewing is 1:16 by weight as a practical starting point: 1 gram of ground coffee for every 16 grams of brew water. That means 15 grams of coffee for 240 grams of water, or 62.5 grams per liter. A useful adjustment range is 1:15 for a stronger cup to 1:18 for a lighter one.
If you remember one number, make it 1:16. If you remember two, make the second this: weigh the ingredients. Coffee varies in density, and a tablespoon of grounds is a much wobblier unit than a gram.
Coffee Ratio Formula: Do the Math Either Way
When you know the water amount, divide it by the second number in the ratio:
coffee dose = water weight ÷ ratio
For 700 grams of water at 1:16, use 700 ÷ 16 = 43.75 grams of coffee, which is sensibly measured as 44 grams.
The reverse calculation is the genuinely handy bit when only 25 grams of beans remain in the bag:
water weight = coffee dose × ratio
At 1:16, those 25 grams of coffee take 25 × 16 = 400 grams of water. No emergency bean negotiations required.
The Golden Cup Reference
The Golden Cup reference sits near 55 grams of coffee per liter of water, or roughly 1:18. The Specialty Coffee Association's home-brewer requirements specifically require a brewer's basket to hold approximately 55 grams per liter at maximum capacity.
That is a useful landmark, not a coffee commandment carved into a stone dripper. Many home recipes use 1:15 to 1:17. Grinder, roast, method, and taste decide where you settle.
Here is the exact arithmetic for one liter:
- 1:15 — 66.7 g coffee (stronger)
- 1:16 — 62.5 g (our default)
- 1:17 — 58.8 g (lighter)
- 1:18 — 55.6 g (lighter still)
Coffee to Water Ratio Chart
The main column uses 1:16. Water is weighed in grams; for kitchen brewing, its gram and milliliter amounts are close enough to use interchangeably.
| Intended batch | Brew water | Coffee at 1:16 | Coffee at 1:15 |
|---|---|---|---|
| 6 fl oz | 180 g | 11 g | 12 g |
| 8 fl oz | 240 g | 15 g | 16 g |
| 12 fl oz | 360 g | 22.5 g | 24 g |
| 16 fl oz | 480 g | 30 g | 32 g |
| 32 fl oz | 950 g | 59 g | 63 g |
| 1 liter | 1,000 g | 62.5 g | 66.7 g |
Rounded coffee doses are deliberate: a scale may show decimals, but your tongue is unlikely to file a complaint over half a gram in a full carafe.
Brew Water Is Not Final Beverage Volume
The chart gives water poured into the brewer, not the exact amount that lands in the cup. Grounds retain some liquid, and a little may remain in the filter or brewer. If you need 480 grams of finished coffee for two mugs, starting with exactly 480 grams of water will leave you short.
The loss changes with coffee dose, grind, brewer, and method, so there is no honest universal top-up. Brew once, weigh the finished beverage, and note the water amount that fills your own mugs. Keep the coffee-to-water ratio based on total brew water so the recipe stays repeatable.
How Much Coffee Per Cup?
Use 15 grams per 8-fluid-ounce cup as the 1:16 default, but check what “cup” means:
- A US measuring cup is 8 fluid ounces.
- Many drip machines count 5–6 fluid ounces as one marked “cup,” not 8; for example, Cuisinart labels its carafe cup approximately 5 ounces. Check your manual.
- A typical 10–12-ounce mug needs about 19–22.5 grams at 1:16; a 6-ounce machine serving needs about 11 grams.
How Many Tablespoons per Cup?
Without a scale, estimate about 5 grams per level tablespoon of ground coffee. Grind and roast change how much fits, so treat these as starting estimates:
- 8 fl oz: about 3 level tablespoons
- 12 fl oz: about 4½ level tablespoons
- 6 fl oz: about 2¼ tablespoons, or roughly 11 grams
A scale that reads tenths of a gram makes tomorrow's cup easier to reproduce.
How to Adjust the Ratio to Taste
Change one variable per brew:
- Too strong or heavy? Keep the water fixed and use less coffee, moving toward 1:17 or 1:18.
- Too weak? Use more coffee, moving toward 1:15.
- Sour or thin despite enough coffee? That often points to extraction rather than ratio; try a finer grind or hotter water.
- Bitter or harsh? Try a coarser grind before weakening the recipe.
If adjusting temperature, handle the kettle, brewer, and hot glass with care. A common brewing range is 195–205°F (90–96°C).
Does Ratio Change by Brew Method?
The 1:15–1:18 range covers many drip, pour-over, and immersion recipes, but methods choose different starting points. Our French press recipe uses 1:15 because its metal mesh leaves more oils and fine particles in the cup than paper filtration; a slightly bolder dose suits that fuller body. Pour-over and drip often start around 1:16 or 1:17.
Espresso is its own little pressure-powered planet. A common starting beverage ratio is about 1:2 coffee to espresso by weight—for example, 18 grams of dry coffee yielding 36 grams in the cup. The SCA explains this beverage-ratio convention, which compares dose with beverage yield rather than total brew water.
For complete grind, temperature, and timing recipes, visit the brew methods guides. Start with a weighed ratio, taste, and change one thing. That is less glamorous than hunting for a sacred number, but it makes better coffee.