Add more coffee first. Weak French press coffee is a ratio problem far more often than a technique problem, so move from 1:16 to about 1:13: for a 17 oz press, that is about 39 g (roughly 8 level tablespoons, or 4 scoops) instead of 31 g. If it is still weak, change the grind, then the steep time, then the water temperature, one at a time.
What should you change first when French press coffee is weak?
Change one thing per brew, in this order. It saves coffee and you will know what worked.
- Ratio. Use more coffee, not more water. Try 1:13, then 1:12 if you still want more.
- Grind. Make it a little finer, but still coarse enough that a plunger moves down without a fight. Sea salt is a fair mental picture.
- Steep time. Four minutes is the starting point. Add 30 seconds at a time.
- Water temperature. Use water just off the boil, around 195 to 205 °F (90 to 96 °C). Water that has sat for ten minutes is cooler than it looks.
- Stir and plunge. Stir the crust once after pouring, and plunge slowly and all the way down.
How much more coffee does a weak French press need?
The table shows grams of coffee per press size at three strengths. Level tablespoons are 5 g each and a scoop is 2 tablespoons. Water is the full press volume, so a real pour will be a little less.
| Press size | Standard 1:15 | Stronger 1:13 | Strong 1:12 |
|---|---|---|---|
| 12 oz (355 g water) | 24 g, 4.7 tbsp, 2.4 scoops | 27 g, 5.5 tbsp, 2.7 scoops | 30 g, 5.9 tbsp, 3 scoops |
| 17 oz (503 g water) | 34 g, 6.7 tbsp, 3.4 scoops | 39 g, 7.7 tbsp, 3.9 scoops | 42 g, 8.4 tbsp, 4.2 scoops |
| 34 oz (1,005 g water) | 67 g, 13.4 tbsp, 6.7 scoops | 77 g, 15.5 tbsp, 7.7 scoops | 84 g, 16.8 tbsp, 8.4 scoops |
The full ratio table for every size is in our how much coffee per cup guide, and the by-method comparison is in coffee ratio by brewing method: one chart. If your scoop is not 2 tablespoons, see how many tablespoons are in a coffee scoop.
Is the grind making it weak?
Yes, if the cup tastes thin and a little sour, and there is little sediment. A grind that is too coarse lets water run past the coffee without taking much with it. Go one step finer and keep everything else the same.
The opposite problem looks different. If the cup is murky, dry and bitter, you went too fine or steeped too long. Pre-ground coffee is often sized for drip, which is finer than a press wants, so keep the steep short if you use it. Cleaning also matters: old oils and a clogged mesh filter change how water moves, and our guide to how to clean a French press shows how.
Does the coffee itself matter?
A little. Some coffees taste thin when they are under-extracted and others stay pleasant. We cannot say how each bag behaves in every press, but we can tell you what the roaster says about the two we would reach for.
No. 1 Common Sense is listed by the roaster for drip or French press at 60 g per litre with water just off the boil, and it takes milk without falling apart. That makes it a forgiving starting point while you tune the ratio.
Our pick
No. 1 Common Sense
Huila and Medellin-Antioquia, Colombia · 1,300 to 1,500 m · Fully washed, solar dried · Castillo, Caturra, Colombia, Typica · Medium
Cocoa, red apple and brown sugar on the label, and the roaster lists French press as a method.
No. 6 Hegemony is not listed for French press on its label, but the roaster describes it as low in acidity with heavy body, which makes it very hard to ruin. That is a useful trait if your press cup tastes thin. See the explanation of body to read what that means. Every coffee is $28 for 12 oz, whole bean or ground, with free US shipping. You can look at all ten coffees or set up a subscription, which is 11% off, with skip or cancel in one click.
Do small habits make a difference?
Yes, three of them. Weigh the coffee instead of counting spoons, because a heaped tablespoon can hold twice what a level one does. Warm the empty press with hot water before you start so the brew does not lose heat in the first minute. And pour all the water in one go, wetting every ground, rather than a splash first and the rest later.
If the cup is still weak after all five steps, go back to the ratio and move one more notch.
Questions people ask
How long should I steep French press coffee so it is not weak?
Four minutes is the usual starting point. If the cup is still weak after you fix the ratio and the grind, try a minute longer. Going past six minutes tends to bring bitterness, not strength.
Why is my French press coffee watery even with a lot of coffee?
The grind is probably too coarse, or the water was too cool. Coarse grounds give up flavor slowly, and water well below the boil under-extracts. Fix the grind before adding more coffee.
How many scoops of coffee for a strong French press?
For a 34 oz press, about 8 scoops (2 level tablespoons each, roughly 84 g) at 1:12 is strong. About 6.7 scoops (67 g) at 1:15 is a standard cup.
Free printable
Keep the ratio chart on your fridge
One page with grams, level tablespoons and scoops for every cup size and for coffee makers from 2 to 14 cups. Leave your email and the download link appears right here.