If your coffee is inconsistent — great Tuesday, terrible Wednesday — the problem is almost always the ratio. Nail this one number and everything else gets easier.
What the golden ratio means
The Specialty Coffee Association’s standard is roughly 1:16 to 1:18 — one gram of coffee for every 16–18 grams of water. We recommend starting at 1:16: for a 12 oz mug (355 g of water), that’s 22 grams of coffee.
Why weight beats volume
A “tablespoon of coffee” can weigh anywhere from 4 to 7 grams depending on roast level and grind size — up to a 75% swing. That’s the difference between bold and dishwater. A $15 gram scale ends the guessing permanently.
Ratios by brewing method
Different methods want different strengths. French press shines at 1:15, Chemex at 1:17, espresso at 1:2, and cold brew concentrate at 1:5. Our full ratio chart covers every method with worked examples.
Adjusting to taste
Too weak? Don’t brew longer — add coffee (move toward 1:15). Too intense? Move toward 1:17. Change the ratio before you touch grind size; it’s the more predictable variable.
No scale? Use this
Two level tablespoons of medium-ground coffee per 6 oz of water lands close to 1:16. It’s not precise, but it beats freehanding. Or skip the math entirely with our coffee calculator.
