Miles SinclairBy Miles Sinclair

Updated November 2026

If you want to know how many grams coffee for French press brewing you should measure, the short answer is a 1:15 ratio: 30 grams of coffee for every 450 grams (about 450 ml) of water. That gives you two generous mugs with a full body and a clean finish. Once you have the number, the rest of this guide covers how to adjust it to your taste and get the brew right every time.

The Basic Ratio and Why It Works

Most French press guides start with a ratio because it scales. A 1:15 ratio means 15 grams of water for every gram of coffee. For a standard 1-liter press, which usually makes four to five cups, you would use about 66 grams of coffee and 1,000 grams of water. For a smaller 350 ml press, 23 grams of coffee and about 350 grams of water is a good starting point.

Shopping for one? See our guide: French Press Coffee Ratio: 3 Best Picks for Perfect Brews.

Weighing your coffee is more accurate than using scoops. Scoops vary with how finely the beans are ground and how tightly they are packed, so two scoops can differ by several grams.

Adjusting Strength Up or Down

Treat 1:15 as a baseline, not a rule. Change the ratio by small steps and taste after each brew.

  • Lighter cup: go to 1:17 (about 26 g per 450 g water).
  • Balanced cup: stay at 1:15 (30 g per 450 g water).
  • Stronger cup: move to 1:13 (about 35 g per 450 g water).

Coarse grind matters here too. A coarse grind extracts more slowly, so a slightly higher dose can work well without tasting bitter. If your coffee tastes thin even at 1:15, add a few grams before you change the grind.

Step-by-Step: Brewing with the Right Amount

  1. Weigh 30 g of coarsely ground coffee for a 450 g water brew.
  2. Heat water to about 200°F (93°C). Let boiling water sit for 30 to 45 seconds first.
  3. Add the grounds to the press, then pour in all the water at once.
  4. Stir gently to wet every grain, then place the lid on with the plunger pulled up.
  5. Steep for 4 minutes. For more on timing, see How Long to Steep French Press: 4 Minutes for a Balanced Cup.
  6. Press down slowly and steadily, then pour all the coffee out right away so it does not keep extracting.

For a more detailed walkthrough of each stage, How to Make French Press Coffee: A Step-by-Step Guide for Beginners covers the full process.

Grind Size and Why It Changes Your Dose

Grind size affects how much coffee you need and how clean the cup tastes. French press works best with a coarse grind, similar to coarse sea salt. Finer grounds pass through the mesh filter, leaving sediment in your cup and sometimes a harsh, muddy taste. If you are still working out the right setting, Proper Grind for French Press Coffee: A Step-by-Step Guide explains how to dial it in.

Pre-ground coffee sold for drip machines is usually too fine. Look for beans labeled coarse or French press, or buy a burr grinder and set it to its coarsest setting.

Common Mistakes

  • Measuring by volume instead of weight, which leads to inconsistent cups.
  • Using a grind that is too fine, causing bitterness and sludge.
  • Leaving coffee in the press after plunging, which over-extracts the brew.
  • Using boiling water straight off the kettle, which can scorch the grounds.
  • Changing the ratio and the grind at the same time, so you cannot tell which change helped.

A digital scale that reads in one-gram increments makes the ratio easy to hit every time. A burr grinder gives you a consistent coarse grind, which is hard to get with blade grinders. A kitchen thermometer helps you check that your water is near 200°F before you pour.

  • Digital kitchen scale with a tare function: lets you weigh coffee and water precisely. View on Amazon
  • Burr coffee grinder: produces an even, adjustable coarse grind. View on Amazon
  • Instant-read kitchen thermometer: helps you confirm water temperature. View on Amazon

FAQ

How many grams of coffee in a French press for two cups?

For two standard mugs, about 450 ml of water, use roughly 30 grams of coarsely ground coffee. Adjust by a few grams if you prefer a lighter or stronger cup.

How many grams of coffee for a French press that makes four cups?

For a 1-liter press, use about 66 grams of coffee with 1,000 grams of water. This keeps the 1:15 ratio consistent across the full batch.

Can I use a tablespoon instead of a scale?

You can, but results vary because a tablespoon of ground coffee can differ noticeably in weight depending on grind size. A scale gives you the same result every time.

Conclusion

For most French presses, start with 30 grams of coarse coffee for every 450 grams of water and steep for about four minutes. Adjust the ratio in small steps until the cup tastes right for you. Once you have a repeatable recipe, the coffee itself becomes the variable you can explore.

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Miles Sinclair

About Miles Sinclair

Miles Sinclair is part of our editorial team and reviews and edits our coffee beans & brewing methods guides, checking product details against manufacturer specifications and owner feedback.