Most bad coffee at home is not the beans. It is the ratio. Too little coffee and the cup is thin and sour; too much and it is muddy and bitter. Fix the ratio and everything else gets easier.
The short answer
Use about 1 gram of coffee for every 16 grams of water for drip and pour-over. That is roughly 2 level tablespoons per 6 oz cup. If you have a kitchen scale, use it. Scoops vary by 30% depending on how you fill them.
Ratios by brew method
| Method | Ratio | Example | Grind |
|---|---|---|---|
| Drip / auto-brewer | 1:16 | 60 g coffee per 1 liter water | Medium |
| Pour-over (V60, Chemex, Kalita) | 1:16 | 22 g coffee to 350 g water | Medium-fine |
| French press | 1:15 | 30 g coffee to 450 g water | Coarse |
| AeroPress | 1:14 | 15 g coffee to 220 g water | Medium-fine |
| Cold brew concentrate | 1:8 | 125 g coffee to 1 liter water, 14 to 16 hours | Coarse |
| Moka pot | 1:12 | Fill the basket level, no tamping | Fine (not espresso-fine) |
| Espresso | 1:2 | 18 g in, 36 g out, 25 to 32 seconds | Very fine |
How to adjust
Taste it. If the cup is sour or thin, use a little more coffee or grind finer. If it is bitter or harsh, use a little less coffee or grind coarser. Change one thing at a time and give it a day before changing the next.
Water matters too
Use water you would happily drink. Filtered tap water is fine. Aim for 200 to 205 F, which is about 30 seconds off the boil. Water that is too hot pulls out bitterness; water that is too cool leaves the cup flat.
A note on freshness
Ratios assume fresh coffee. Beans more than six weeks off roast have lost the gas and aromatics that make the cup sweet, and no ratio will bring them back. Our coffee is roasted on the 1st of every month and ships within 3 business days, so the roast date on the bag is the date it was actually roasted.
Which coffee for which method
- Drip, pour-over, French press: Signature Roast
- Pour-over when you want something brighter: Single Origin, Huila Colombia
- Espresso and moka pot: Espresso Roast
- Any method, no caffeine: Signature Decaf