Every bag of coffee seems to have its own opinion about how much of it you should use. One roaster says two tablespoons per cup. Another says an ounce per liter. Your favorite YouTube barista swears by grams, and now you’re standing in your kitchen wondering who’s actually right.
Here’s the short answer: 1:17 for a regular cup and 1:15 for a stronger one. That’s 1 gram of coffee for every 17 grams of water at regular strength, or 1 gram for every 15 grams at strong. Search around and you’ll see it phrased both ways — best coffee to water ratio for pour over, or best water to coffee ratio for pour over — but it’s the same number either way.
The gap between regular and strong is smaller here than with a lot of other coffee brewing methods, which is part of why pour-over feels so forgiving once you know your starting point.
Let’s put it into a real example. Say you’re brewing a 300 mL cup (10.14 US fl. oz.). At the regular 1:17 ratio, that’s about 17.65 grams of coffee (0.62 ounces). For a stronger cup at 1:15, it’s 20 grams (0.71 ounces).
Or scale it up to a full Chemex 8-cup batch, one of the most popular ways to brew pour-over coffee. Chemex measures 1 cup as 5 US fl. oz., so an 8-cup batch is 40 US fl. oz. total. At 1:17, that’s 2.45 ounces of coffee. At 1:15, it’s 2.78 ounces.
Below, we’ll break down exactly how much coffee to use for any cup size, brewer, or roast level — plus give you a calculator so you don’t have to do any of that math by hand.
- What Is Pour-Over Coffee?
- Why the Coffee-to-Water Ratio Actually Matters
- The Best Coffee-to-Water Ratio for Pour Over
- Find Your Exact Ratio: Try the Calculator
- Coffee-to-Water Ratio Chart by Cup Size
- Ratio by Brewer: Chemex vs. Hario V60 vs. Kalita Wave
- Adjusting Your Ratio for Roast Level
- Measuring Coffee for Pour-Over Without a Scale
- How to Make the Perfect Pour-Over Coffee
- Fixing Weak, Bitter, or Sour Pour-Over Coffee
- FAQs
- Final Words
What Is Pour-Over Coffee?
Pour-over is exactly what it sounds like: hot water poured over coffee grounds, filtered through paper, and collected below. It’s a manual version of what’s technically called drip-brewed coffee.
A filter sits inside your brewer — Chemex, Hario V60, Kalita Wave, whatever you’ve got — holding the grounds while water passes through and drips into the pot or mug underneath. No pressure, no machine doing the work. Just water, gravity, and however careful you feel like being that morning.
Before we get into ratios, it helps to know what “cup” actually means here, because it’s not as obvious as it sounds. There’s a real difference between a standard coffee cup and a mug — a “cup” in most brewing contexts is 5 US fl. oz., while a mug typically holds 8 US fl. oz. or more. Equipment manufacturers build around the smaller cup measurement, so if you’re eyeballing things in mugs, you might be under-brewing without realizing it.
For the chart below, we’re using 1 mug = 8 US fl. oz. as the baseline, since that’s closer to what most people actually drink out of at home.
Why the Coffee-to-Water Ratio Actually Matters
Ratio is just a fancy way of saying “how much coffee compared to how much water.” But it’s the single biggest lever you have over how your coffee tastes.
Too little coffee for the water, and you get a thin, watery cup that tastes more like flavored water than coffee. Too much, and you get something heavy and bitter that overstays its welcome. Ratio is where you start dialing in strength — before you even touch grind size or water temperature.
Here’s the part that trips people up: ratio controls strength, not necessarily quality. You can brew a strong cup that’s still poorly extracted, or a weak cup that’s technically well-balanced. Ratio gets you in the right neighborhood. Grind size, water temperature, and pour technique are what get you the rest of the way there.
The Best Coffee-to-Water Ratio for Pour Over
For most people, brewing somewhere in the 1:15 to 1:17 range produces a cup that tastes like coffee, not dishwater or diesel fuel. Our go-to numbers:
- 1:17 — regular strength, our everyday recommendation
- 1:15 — stronger, more concentrated
If you want an outside reference point, the Specialty Coffee Association’s Golden Cup Standard calls for roughly 55 grams of coffee per liter of water (with about a 10% margin either way), which lands at close to a 1:18 ratio. That’s a touch gentler than our regular recommendation. It’s also a standard built more for consistency across large batches than for dialing in a single home cup, but it’s a solid sanity check if you ever want to know whether you’re in the right ballpark.
Ratios much stronger than 1:14 or much weaker than 1:18 tend to push pour-over into territory better suited to French press or cold brew, where a longer steep time can handle a heavier dose without turning bitter.
Find Your Exact Ratio: Try the Calculator
Reading charts is fine, but punching in your exact cup size takes the guesswork out completely.
Pick your brewer, enter your water or coffee amount, and slide toward regular or strong. It outputs your coffee and water in grams and ounces, along with a matching grind size and water temperature.
1 : 16 · Regular
Coffee-to-Water Ratio Chart by Cup Size
If you'd rather skip the calculator and just look something up, here's the same math laid out for common batch sizes, based on 1 mug = 8 US fl. oz.
| Amount of Water | Equivalent Mug(s) | Strength Type | Grams of Coffee | Ounces of Coffee |
| 8 oz (237 ml) | 1 Mug | Regular | 13.94 | 0.49 |
| 8 oz (237 ml) | 1 Mug | Strong | 15.8 | 0.56 |
| 16 oz (473 ml) | 2 Mugs | Regular | 27.82 | 0.98 |
| 16 oz (473 ml) | 2 Mugs | Strong | 31.53 | 1.11 |
| 24 oz (710 ml) | 3 Mugs | Regular | 41.76 | 1.47 |
| 24 oz (710 ml) | 3 Mugs | Strong | 47.33 | 1.67 |
| 32 oz (946 ml) | 4 Mugs | Regular | 55.65 | 1.96 |
| 32 oz (946 ml) | 4 Mugs | Strong | 63.07 | 2.22 |
| 40 oz (1183 ml) | 5 Mugs | Regular | 69.59 | 2.45 |
| 40 oz (1183 ml) | 5 Mugs | Strong | 78.87 | 2.78 |
| 48 oz (1420 ml) | 6 Mugs | Regular | 83.53 | 2.95 |
| 48 oz (1420 ml) | 6 Mugs | Strong | 94.67 | 3.34 |
Ratio by Brewer: Chemex vs. Hario V60 vs. Kalita Wave
Two of the most popular pour-over brewers are the Chemex and the Hario V60, with the Kalita Wave close behind. They don't all behave identically, even at the exact same ratio.
The difference comes down to filter thickness and drawdown time — how long the water actually spends in contact with the grounds. Chemex uses a noticeably thicker paper filter, which slows the flow and pulls out more body while filtering out more oils. The V60's cone shape and large single hole let water move through fast, which is why V60 recipes often lean toward the stronger end of the range to compensate. The Kalita Wave's flat bed and three small holes sit in between, which is part of why people describe it as the most forgiving of the three.
Best Coffee-to-Water Ratio for Chemex
Chemex is a beautifully simple glass pour-over maker that comes in a few sizes — 3-cup, 6-cup, 8-cup, and 10-cup servings. Every Chemex measures 1 cup as 5 US fl. oz.
| Amount of Water | Equivalent Cup(s) | Strength Type | Grams of Coffee | Ounces of Coffee |
| 5 oz (148 ml) | 1 Cup | Regular | 8.71 | 0.31 |
| 5 oz (148 ml) | 1 Cup | Strong | 9.87 | 0.35 |
| 10 oz (296 ml) | 2 Cups | Regular | 17.41 | 0.61 |
| 10 oz (296 ml) | 2 Cups | Strong | 19.73 | 0.7 |
| 15 oz (444 ml) | 3 Cups | Regular | 26.12 | 0.92 |
| 15 oz (444 ml) | 3 Cups | Strong | 29.6 | 1.04 |
| 20 oz (591 ml) | 4 Cups | Regular | 34.76 | 1.23 |
| 20 oz (591 ml) | 4 Cups | Strong | 39.4 | 1.39 |
| 30 oz (887 ml) | 6 Cups | Regular | 52.18 | 1.84 |
| 30 oz (887 ml) | 6 Cups | Strong | 59.13 | 2.09 |
| 40 oz (1183 ml) | 8 Cups | Regular | 69.59 | 2.45 |
| 40 oz (1183 ml) | 8 Cups | Strong | 78.87 | 2.78 |
| 50 oz (1479 ml) | 10 Cups | Regular | 87 | 3.07 |
| 50 oz (1479 ml) | 10 Cups | Strong | 98.6 | 3.48 |
Best Coffee-to-Water Ratio for Hario V60
The Hario V60 comes in sizes that brew anywhere from 1 to 4 cups. Because of its fast drawdown, most V60 recipes from roasters and competitive brewers land in the same 1:15 to 1:17 window we recommend overall, so we're using those same ratios here instead of a separate scale.
| Amount of Water | Equivalent Cup(s) | Strength Type | Grams of Coffee | Ounces of Coffee |
| 220 ml | 1 Cup | Regular | 12.94 | 0.46 |
| 220 ml | 1 Cup | Strong | 14.67 | 0.52 |
| 440 ml | 2 Cups | Regular | 25.88 | 0.91 |
| 440 ml | 2 Cups | Strong | 29.33 | 1.03 |
| 660 ml | 3 Cups | Regular | 38.82 | 1.37 |
| 660 ml | 3 Cups | Strong | 44.00 | 1.55 |
Adjusting Your Ratio for Roast Level
Roast level changes how easily coffee gives up its flavor — what's called solubility. Light roasts are denser and slower to extract, so most brewers nudge toward the stronger end of the range to compensate:
- Light roast: lean toward 1:15
- Medium roast: stick with 1:16 to 1:17
- Dark roast: lean toward 1:17 to 1:18
Dark roast beans are more porous and give up flavor fast, which is exactly why a heavy-handed dark roast pour-over turns bitter so quickly — you're extracting plenty, just too much of the wrong compounds. Backing off the dose gives you room to avoid that.
Not everyone agrees you need to touch the ratio at all. Some brewers prefer to leave it fixed and adjust only grind size and water temperature by roast instead, since both matter just as much. Either approach works. If you'd rather change one variable at a time, start with grind and temperature and only touch ratio once you've ruled those out.
Worth mentioning too: light to medium roasts tend to be the better overall match for pour-over. The method is built around clarity and brightness, and a very dark roast tends to mute exactly those qualities. It can still work if a bold, low-acid cup is what you're after — it just isn't what pour-over is best known for.
Measuring Coffee for Pour-Over Without a Scale
A kitchen scale is the most accurate way to hit your ratio, but it's not the only way. One level tablespoon of ground coffee weighs roughly 5 to 7 grams, depending on grind size and roast — so treat these numbers as a starting point, not gospel.
| Water | Coffee (approx.) | Tablespoons (approx.) |
| 8 oz | ~15 g | 2 to 3 |
| 12 oz | ~22 g | 3 to 4 |
| 16 oz | ~29 g | 4 to 5 |
If your coffee consistently tastes off using tablespoons, that's your sign to grab a scale. Even an inexpensive one gets you far more consistent results than eyeballing scoops.
How to Make the Perfect Pour-Over Coffee
Step 1: Prep Your Water and Filter
Boil your water, then let it sit off the boil for about 30 seconds — you're aiming for 195°F to 205°F at the point it actually hits the grounds. A gooseneck kettle helps a lot here, since it gives you real control over your pour. Place a paper filter in your brewer and rinse it with hot water to remove any papery taste, then discard that rinse water.
Step 2: Weigh and Grind Your Coffee
Weigh your coffee using the ratio you've settled on — 1:17 for regular, 1:15 for a stronger brew. Light to medium roast will give you the most clarity, though any roast can work if you adjust to taste. Grind size matters here too: aim for medium-fine, about the texture of table salt, for a Hario V60. For a Chemex or Kalita Wave, go slightly coarser, closer to coarse sand.
Step 3: Bloom the Grounds
Pour just enough hot water to saturate all the grounds — roughly twice the weight of your coffee — and let it sit for 30 to 45 seconds. This is the bloom. It lets trapped CO2 escape so your later pours extract evenly instead of channeling around trapped gas.
Step 4: Finish the Pour
Pour the rest of your water slowly, in a steady circular motion, keeping the water level fairly consistent rather than letting it drain completely between pours. Avoid pouring directly onto the filter cone itself — water hitting bare paper bypasses the coffee bed entirely and dilutes your cup. Once the stream slows to an occasional drip, you're done.
Fixing Weak, Bitter, or Sour Pour-Over Coffee
| Problem | Likely Cause | Fix |
| Tastes weak or watery | Not enough coffee for the water, or grind too coarse | Move to a stronger ratio like 1:15, or grind slightly finer |
| Tastes sour or sharp | Under-extracted — water too cool, grind too coarse, or pour too fast | Grind finer, raise water temp toward 205°F, or slow your pour |
| Tastes bitter or harsh | Over-extracted — water too hot, grind too fine, or brewed too long | Grind slightly coarser, or lower water temp toward 195°F |
| Tastes muddy or heavy | Too much coffee, or fines getting into the cup | Use a slightly higher ratio number, or check your filter for tears |
FAQs
1:17 for a regular cup, 1:15 for a stronger one. If you want the specialty-industry benchmark instead, the SCA's Golden Cup Standard works out to roughly 1:18.
At a 1:16 ratio, that's about 1 ounce (28 grams) of coffee for 16 ounces of water.
Two cups (10 oz. of water) needs roughly 0.6 to 0.7 ounces of coffee, depending on whether you're brewing regular or strong.
Usually it's too coarse a grind, not enough coffee for the water, or both. Try tightening your ratio to 1:15 and grinding slightly finer before troubleshooting anything else.
Between 195°F and 205°F. Water that's too cool under-extracts and tastes sour; water at a rolling boil can scald the grounds and pull out bitterness.
Not directly — ratio is about weight, grind is about extraction speed. But the two work together: a coarser grind slows extraction, so some brewers compensate with a slightly stronger ratio, and vice versa.
About 55 grams of coffee per liter of water, or roughly 1:18. It's the benchmark the Specialty Coffee Association uses for balanced, consistent brewing, particularly in batch settings.
Final Words
At the end of the day, the best coffee-to-water ratio is the one that tastes best in your cup, brewed with your beans, in your kitchen. The 1:15 to 1:17 range — or 1:18 if you're chasing the SCA standard — is a genuinely reliable starting point, not a rule carved in stone.
Pour-over is also just a different animal than most other brewing methods. You're not applying pressure, boiling anything, or letting grounds steep for minutes at a time. It's water, gravity, and gentle control, which is exactly why small changes to your ratio make such a noticeable difference in the cup.
So dial it in, taste as you go, and don't be afraid to nudge the numbers until it's right for you — for pour-over, and for everything else you brew, like French press.
Enjoy your coffee!
