Pour Over Ratios: 1:15, 1:16, 1:17 — Which One and When

A 1:16 ratio means one gram of coffee for every sixteen grams of water. For a 20-gram dose, that's 320 grams of water. Tighter ratios (1:15) give a stronger, denser cup. Looser ratios (1:17) give a lighter, tea-like cup.

Where to start

Begin at 1:16 for almost any bean. It's the middle ground that lets you taste both sweetness and acidity clearly. Adjust from there based on the roaster's suggested recipe or your own palate.

When to break the rule

Very light Nordic roasts often shine at 1:17 with longer brew times. Darker roasts get muddy past 1:15. Trust your tongue over the internet — if the cup tastes thin, tighten; if it tastes heavy, loosen.

Going deeper

There's the version of this you can learn in five minutes, and there's the version that makes every cup better for the next ten years. This is the second one.

Dialing in grind size

Grind is the single biggest lever you have. Too coarse and the brew runs fast, tastes thin, and finishes sour. Too fine and it stalls, over-extracts, and turns bitter. Start medium-fine — roughly the texture of table salt — and adjust in small steps. If your total brew time lands under 2:45, tighten the grind two clicks. Over 3:45, open it up two clicks. Never change grind and ratio in the same session; you'll never know which variable moved the cup.

Water quality and temperature

Coffee is 98 percent water, so bad water guarantees a bad cup. Aim for 150 ppm total dissolved solids with a balanced calcium-to-magnesium ratio. Third Wave Water and Lotus Water Drops both make this trivial. Brew temperature belongs between 195 and 205 degrees Fahrenheit — hotter for dense light roasts, cooler for darker ones. A thermometer or a temperature-controlled kettle removes the guesswork entirely.

Reading the bed after brewing

The spent coffee bed tells you exactly what happened. A flat, even bed with a small dome in the center means uniform extraction. A crater or channel means water bypassed some of the grounds — usually caused by an aggressive pour or an uneven initial distribution. High walls of coffee stuck to the paper mean you didn't rinse the sides down enough. Take ten seconds to look before you rinse the dripper.

Pouring technique that actually matters

Pour in slow concentric circles from the center outward, then back. Keep the kettle spout two to three inches above the bed so the water enters gently instead of drilling a channel. Avoid pouring directly on the paper — grounds stuck to the wall don't extract. Pulse pouring (multiple small pours) gives you more control than a single continuous pour, especially on lighter roasts that need agitation to open up.

Common mistakes to avoid

The fastest way to improve is to stop doing the wrong thing. In order of frequency: using stale coffee, skipping the scale, running the water too cool, and changing multiple variables at once. Fix those four and you're brewing better than 90 percent of home setups.

Final thoughts

Coffee at this level rewards attention, not spending. A modest setup used consistently beats an expensive setup used carelessly, every time. Give any technique two weeks of daily practice before deciding whether it works for you — palate takes longer to train than muscle memory.