The Ultimate Guide to Pour Over Coffee Ratio: Perfect Brewing Every Time

The golden pour over coffee ratio is 1:15 to 1:17 (coffee to water). In practical terms, that’s 20 grams of coffee for every 300 to 340 grams of water. Like it stronger? Lean toward 1:15. Prefer something lighter and cleaner? Go with 1:17. Start there, brew, and adjust to taste.

Everything else on this page — the ratio table, the tablespoon conversions, the step-by-step method — is built around that single answer.

What “1:16” Actually Means

A coffee ratio reads as coffee parts to water parts by weight. At 1:16, one gram of coffee meets sixteen grams of water. So for 320 grams of water (about 11 oz), you’d weigh out 20 grams of coffee. Water is easy — one milliliter weighs one gram, so your 300 ml of water weighs 300 grams.

The reason pour over brewers talk about ratios more than, say, French press brewers is control. A pour over gives you command over every variable: pour speed, bloom time, agitation. Locking in the ratio first removes the biggest source of guesswork, so when you tweak the grind or the pour, you know exactly what changed.

Pour Over Coffee Ratio Chart

Use the chart below as your starting point. The “sweet spot” column (1:16) is where most brewers land; the other two columns let you brew stronger or lighter on demand.

One tablespoon of ground coffee weighs roughly 5 grams — that’s the number the tbsp column is built on. Spoon measurements get you close, but a cheap digital scale (to 1 gram) is the single biggest upgrade you can make to your pour over. It’s faster than spooning and it tastes noticeably more consistent.

Grams vs Tablespoons vs Ounces

Grams are the standard for a reason: coffee density changes with grind size and roast level, so “two scoops” can mean wildly different amounts of actual coffee. Weighing removes that variable entirely.

Tablespoons work in a pinch — especially for travel or the office — but expect some drift. If you brew with spoons one day and a scale the next, don’t be surprised if the cups taste different even at the “same” ratio.

Fluid ounces are for the water side. Since water is the same density every time, measuring water in ounces or milliliters is perfectly fine.

Step-by-Step: Brew With the Golden Ratio

This method uses the sweet-spot ratio — 20 grams of coffee to 320 grams of water — on any standard dripper (V60, Kalita Wave, Chemex all work; just scale the recipe up for the Chemex).

1. Heat water to 195–205°F (90–96°C). Lighter roasts do better at the hot end; darker roasts sit more comfortably around 195–200°F.
2. Grind 20 g of coffee to medium — about the texture of sea salt. Too fine and the cup turns bitter; too coarse and it comes out thin and sour.
3. Rinse the paper filter with hot water and discard the rinse water. This washes out the papery taste and warms the dripper.
4. Bloom: pour about 50 g of water over the grounds (roughly double the coffee weight) and wait 45 seconds. Fresh coffee will swell and bubble as trapped CO₂ escapes. Skip this and the cup tastes flat.
5. Pour in slow spirals until you hit 200 g, then pause. At around 1:30, pour again until you reach 320 g total.
6. Let it drain. The whole brew should finish between 2:30 and 3:30 minutes. If it drains way faster, grind finer; way slower, grind coarser.

Taste the cup. Sour and sharp? Grind a touch finer or bump the ratio toward 1:15. Bitter and heavy? Grind coarser or stretch to 1:17. One change at a time — that’s how you dial in.

Ratio by Cup Size

• 1 cup (8 oz / 240 ml): 15 g coffee (3 tbsp) at 1:16. A solid starting point for a single morning cup.
• 2 cups (16 oz / 480 ml): 30 g coffee (6 tbsp) at 1:16. Double the coffee, double the water — the ratio doesn’t change.
• 3 cups (24 oz / 720 ml): 45 g coffee at 1:16. For bigger brewers like the Chemex, watch the drawdown time — you may need a slightly coarser grind to keep it under about 4 minutes.

Notice the ratio stays the same no matter the batch size. Strength is a function of the ratio, not the volume. If a bigger batch tastes weak, your ratio drifted — not your cup count.

Common Mistakes

• Eyeballing the coffee. Two heaped scoops can differ by 4–5 grams. That’s the difference between 1:15 and 1:17 without you knowing it.
• Water too hot or too cool. Boiling water (212°F) scorches the grounds and pulls out harsh bitterness; lukewarm water never extracts enough and leaves the cup sour and empty. Stay in the 195–205°F window.
• Rushing the pour. Dumping all the water in at once agitates the bed unevenly and channels the water, so some grounds over-extract and some barely brew. Slow spirals fix this.
• Grinding everything the same. That medium “sea salt” grind is a starting point, not a law. Lighter roasts often like it a touch finer; darker roasts a touch coarser.
• Changing three things at once. Ratio, grind, and temperature all move the flavor. Change one, taste, then decide.

How to Adjust to Your Taste

Ratios are starting lines, not finish lines. Your beans, your grinder, and your palate all have a say.

• Too sour or weak: the coffee is under-extracted. Go a bit finer on the grind, or move the ratio toward 1:15 (more coffee).
• Too bitter or harsh: it’s over-extracted. Go a bit coarser, or move toward 1:17 (less coffee).
• Tastes fine but dull: try water a few degrees hotter, or a fresher bag of beans — staleness mutes everything, and no ratio fixes stale coffee.

Keep a simple log for a week: grams, water temp, grind setting, one tasting note. You’ll land on your personal ratio faster than any chart can give you.

FAQ

What is the golden ratio for pour over coffee?

1:15 to 1:17 (coffee to water), with 1:16 as the classic starting point. That’s 20 g of coffee for 300–340 g of water.

How many tablespoons of coffee for 16 oz of pour over?

About 6 tablespoons, which is roughly 30 grams — the 1:16 ratio for 16 oz (480 ml) of water.

How much coffee for 1 cup (8 oz) of pour over?

15 grams, or about 3 tablespoons, for 8 oz (240 ml) of water at 1:16. Use 16 g for stronger, 14 g for lighter.

What water temperature is best for pour over?

195–205°F (90–96°C). Lighter roasts prefer the hotter end of that range; darker roasts do better slightly cooler.

What grind size should I use for pour over?

Medium, roughly the texture of sea salt. Finer grinds extract more and suit lighter roasts; coarser grinds extract less and suit darker roasts or larger batch sizes.

Is 1:15 or 1:17 better?

Neither is better — it’s taste. 1:15 gives a fuller, stronger cup; 1:17 gives a lighter, more delicate one. Brew both at 1:16 first, then move in the direction you like.

Can I use a 1:14 ratio?

You can, but it runs strong and can edge into bitterness with medium-dark roasts. Try 1:15 first and only go further if the cup still tastes thin to you.

Finding Your Perfect Ratio

The golden pour over coffee ratio — 1:15 to 1:17, or 20 g of coffee for 300–340 g of water — will get you a great cup on the first try. From there, it’s yours to tune. Keep the ratio locked while you experiment with grind and temperature, change one variable at a time, and you’ll have a personal recipe worth repeating within a week.