French Press Coffee Ratio: How Much Coffee to Use (With Chart)

The best French press coffee ratio is 1:15 — one gram of coffee for every 15 grams of water. In practice that’s about 33 grams of coffee for 500 ml (17 fl oz) of water, or a little over 3 level tablespoons per 8 oz cup.

That’s a strong, full-bodied starting point. Prefer it bolder? Go toward 1:12. Lighter and more tea-like? Try 1:17. Everything else in this guide — charts, grind, time and troubleshooting — builds on that one number.

French press ratio chart

Ratios are by weight, and since 1 ml of water weighs 1 g, you can measure the water by volume. Find your water amount, then read across for the amount of coffee.

Need a different amount, or want to start from how many mugs you’re making? The coffee ratio calculator does the math for any size.

Ratios for common French press sizes

French press sizes are usually sold in “cups,” but a French press cup is only about 4 fl oz — so a classic “8-cup” press holds roughly 34 fl oz (1 liter), and a “3-cup” press about 12 fl oz (350 ml). You won’t fill a press to the brim, so these are the amounts for a nearly full press at 1:15:

• 3-cup press (about 12 fl oz / 350 ml): 23 g coffee, 350 ml water — one large mug.
• 4-cup press (about 17 fl oz / 500 ml): 33 g coffee, 500 ml water — two small mugs.
• 8-cup press (about 34 fl oz / 1 L): 60–67 g coffee, 900 ml–1 L water — three or four mugs.

Your press holds less than it says? Measure it once: fill it with water to about an inch below the rim, pour that into a measuring cup, and use that number in the chart.

Why the French press likes a stronger ratio

Most pour over and drip recipes sit around 1:16 to 1:17, so why go stronger for a French press?

A French press is an immersion brewer: all the water and all the coffee sit together for the whole brew. As the water picks up dissolved coffee, it extracts more slowly, and because you grind coarse for a press (so the metal filter can hold the grounds back), there’s less surface area for the water to work on. A slightly higher dose makes up for both, giving the rich, heavy-bodied cup French press fans are after.

The metal mesh filter also lets through natural coffee oils and some very fine particles that a paper filter would trap. That’s where the press’s body comes from — and why a little sludge at the bottom of the cup is normal.

Measuring without a scale

A scale is the easiest way to get consistent coffee, but you can get close without one:

• Coffee: a level tablespoon of ground coffee weighs about 5 g (more for fine, dense grounds, less for coarse or very dark roasts). At 1:15 that’s about 3 level tablespoons per 8 fl oz of water.
• Water: use a measuring cup — 1 cup (8 fl oz) is about 237 ml.

The problem with scoops is that they vary: the same tablespoon of coarse, dark-roasted coffee can weigh noticeably less than one of fine, light-roasted coffee. If your coffee tastes different from bag to bag, a basic kitchen scale is the cheapest fix.

Grind size, water temperature and time

The ratio only works if the rest of the recipe is in the right range.

• Grind: coarse. Think coarse sea salt or breadcrumbs. Too fine and the coffee turns bitter, the press gets hard to push, and more sludge ends up in your cup. A burr grinder gives a much more even coarse grind than a blade grinder.
• Water: just off the boil, about 195–205°F (90–96°C). Let the kettle rest for 30 seconds or so after it boils.
• Time: about 4 minutes. This is the classic recipe. Coarser grinds or lighter roasts can go a little longer.

Step-by-step French press recipe (500 ml)

1. Heat 500 ml of water to just off the boil.
2. Weigh 33 g of coffee and grind it coarse.
3. Add the grounds to the press and pour in all the water, making sure every bit of coffee gets wet.
4. Put the lid on (plunger up) and start a timer for 4 minutes.
5. Stir gently at 4 minutes to break the crust of grounds on top, and let them sink.
6. Press slowly — it should take about 15–20 seconds. Pushing hard forces fine particles through the mesh.
7. Pour all the coffee out right away. Coffee left in the press keeps extracting and turns bitter.

The longer, cleaner method

If you have time, there’s a popular variation (championed by coffee YouTuber and former World Barista Champion James Hoffmann): at 4 minutes, stir the crust, skim off the foam and floating bits with two spoons, then wait another 5–8 minutes without touching anything. The fine particles settle to the bottom. Then press the plunger only to the surface of the coffee and pour gently. The result is noticeably cleaner, with less grit — and the cooler serving temperature makes the flavors easier to taste.

Troubleshooting by taste

Change one thing at a time. If you change the ratio and the grind together, you won’t know which one helped.

French press vs. other methods

The same approach works for every brewer — only the numbers change:

You can also use your French press for cold brew: use a stronger ratio, an extra-coarse grind, and steep it in the fridge overnight. Our cold brew ratio guide covers the details.