French Press Ratio for 1, 2 and 4 Cups (Grams, Tablespoons and ml)
A good French press ratio is 1:15 — 1 g of coffee per 15 ml of water. For one 250 ml (8.5 oz) mug use about 17 g (3 level tablespoons); for a 350 ml (12 oz) press about 22 g; for a 1-liter (34 oz) press use about 67 g. Use 1:12–1:13 for strong coffee and 1:16–1:17 for a lighter cup.
French press sizes are labeled in "cups" too, and just like drip machines, those cups are small — usually around 4 fl oz (≈120 ml). An "8-cup" press holds about a liter, which is three or four real mugs. This guide gives you ratios in grams, tablespoons and milliliters for every common size, plus a simple way to adjust strength.
The baseline ratio
1:15 works for most people with medium-roast coffee. It's slightly stronger than drip coffee because immersion brewing has more body and the grounds hold back some liquid.
| Strength | Ratio | What it tastes like |
|---|---|---|
| Strong | 1:12 – 1:13 | Bold, heavy, good with milk |
| Balanced | 1:15 | Full-bodied, rounded — start here |
| Light | 1:16 – 1:17 | Cleaner, more tea-like, good for light roasts |
Coffee amounts by number of mugs
Assuming a 250 ml (8.5 oz) mug and about 5.5 g per level tablespoon of coarse ground coffee:
| Mugs | Water | Coffee at 1:15 | ≈ Level tbsp | Strong (1:13) | Light (1:17) |
|---|---|---|---|---|---|
| 1 | 250 ml | 17 g | 3 | 19 g | 15 g |
| 2 | 500 ml | 33 g | 6 | 38 g | 29 g |
| 3 | 750 ml | 50 g | 9 | 58 g | 44 g |
| 4 | 1,000 ml | 67 g | 12 | 77 g | 59 g |
Coarse grounds are fluffier than fine grounds, so a level tablespoon may weigh slightly less. If the coffee tastes weak, add half a tablespoon before changing anything else.
Coffee amounts by press size
| Press label | Approx. capacity | Water to use* | Coffee at 1:15 |
|---|---|---|---|
| 3-cup (12 oz) | 350 ml | 330 ml | 22 g |
| 4-cup (17 oz) | 500 ml | 470 ml | 31 g |
| 8-cup (34 oz) | 1,000 ml | 950 ml | 63 g |
| 12-cup (51 oz) | 1,500 ml | 1,400 ml | 93 g |
*Leave a little room below the top so the grounds and plunger fit without overflowing.
How much coffee do you actually get?
Coffee grounds soak up water — about 2 ml for every gram of coffee — and you should leave the last bit of sludgy coffee in the press. So:
500 ml (17 oz) water − (33 g × 2) ≈ 434 ml (15 oz), minus ~20 ml left at the bottom ≈ about 410 ml (14 oz) in your cups.
If you want two full 250 ml (8.5 oz) mugs, brew with about 600 ml (20 oz) of water and 40 g of coffee.
Worked example: a 1-liter press for four people
- Weigh 63 g of coffee and grind it coarse.
- Heat 950 ml (32 oz) of water to just off the boil (about 93–96°C / 199–205°F).
- Add the coffee, pour all the water, stir gently.
- Wait 4 minutes. For a cleaner cup, break the crust, skim the foam and wait another 4–5 minutes before pressing gently.
- Pour everything out immediately. You'll get roughly 800 ml (27 oz) — four 200 ml (6.8 oz) cups.
Fine-tuning by taste
| Problem | Change ratio? | Or change… |
|---|---|---|
| Weak and watery | Use more coffee (1:14) | — |
| Sour, thin | Keep ratio | Grind a touch finer or steep 1 min longer |
| Bitter, harsh | Keep ratio | Grind coarser, pour off immediately |
| Muddy, gritty | Keep ratio | Coarser grind, let settle, press gently |
For more, see our 9 French press mistakes.
Measuring without a scale
If you don't have a scale, the best approximation is:
- 2 level tablespoons per 180 ml (6.1 oz) of water (a common "standard" that lands near 1:16–1:17)
- 3 level tablespoons per 250 ml (8.5 oz) mug (closer to 1:15)
Better: weigh once using a friend's scale or a cheap kitchen scale and note how many of your scoops make the right amount.
Frequently asked questions
How much coffee for one cup in a French press?
About 17 g — roughly 3 level tablespoons — for a 250 ml (8.5 oz) mug at 1:15.
What is the ratio for a 34 oz French press?
About 63–67 g of coffee for 950 ml (32 oz)–1 liter of water (1:15).
Is 1:10 too strong for French press?
For drinking black, yes for most people. 1:10 is closer to a concentrate; it can work if you dilute with hot water or milk.
Should I use more coffee for dark roast?
Usually slightly less. Dark roasts extract easily and taste stronger, so 1:16 often works better.
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