Coffee-to-Water Ratio: How Much Coffee Per Cup (with Charts)

The fix: Weigh both: start at 1:16 (15g coffee per 250g water) for filter methods, 1:2 for espresso, 1:8 for cold brew concentrate. Adjust ratio for intensity, grind for balance.

"How much coffee should I use?" is the first question in brewing, and the answer is a ratio, not a scoop count: grams of coffee to grams of water. Get the ratio right and every method — pour-over, French press, espresso, cold brew — becomes predictable. This guide gives you the numbers and, more importantly, how to adjust them.

#How ratios work

A ratio of 1:16 means 1 gram of coffee for every 16 grams of water — so 15g of coffee brews with 240g of water. Two things to know up front:

• Weigh, don't scoop. A "tablespoon of coffee" is 4–7g depending on roast, grind, and how the beans settle — up to a 75% swing. A $15 kitchen scale removes the single biggest source of inconsistency in home brewing. Water is easy: 1 ml weighs 1 g, so 240g of water is 240 ml.
• The "golden ratio" is a range, not a law. The classic recommendation for filter coffee is 1:15 to 1:18. Start at 1:16 and move within the range by taste: toward 1:15 for a richer, heavier cup, toward 1:18 for a lighter, more delicate one.

#Ratio chart by brew method

#How much coffee per cup? (quick table for 1:16)

(Rounding to the nearest gram is fine; nobody can taste 0.4g in a liter.)

#Strength vs. extraction — the key distinction

This is where most ratio advice goes wrong. Two different things determine how your cup tastes:

• Strength is concentration: how much dissolved coffee is in the water. The ratio controls this. More coffee per gram of water = stronger.
• Extraction is how much flavor you pulled out of each ground. Grind, temperature, and time control this. Under-extract and it's sour; over-extract and it's bitter.

The practical rule: fix flavor problems with grind, fix intensity problems with ratio.

A classic mistake: the cup is bitter, so you add more coffee to "cover" it. Now it's strong and bitter. Another: the cup is weak, so you grind much finer, and now it's strong but astringent. Ratio for intensity, grind for balance.

#One adjustment at a time

When changing the ratio, move in steps of one (1:16 → 1:15), keep everything else identical, and taste side by side if you can. Note that changing the dose also changes contact time slightly in percolation methods — a much bigger dose with the same grind drains slower — so for large jumps (single cup → full carafe), expect to coarsen the grind a step or two as well.

Once you find your ratio for a method, it barely ever changes — it's the most stable number in your recipe. Write it down once, then spend your attention on grind and technique, which change with every new bag.