Use 55–60 grams per liter for French press—about 28–30 g for 500 ml—then adjust strength to taste.
Why The Ratio Matters For French Press
French press is immersion brewing. Grounds sit in hot water the whole time, so your coffee’s strength comes from two levers: the coffee-to-water ratio and contact time. A clear starting point helps you hit a balanced cup on the first try and tweak from there. The most referenced industry baseline is 55 grams of coffee per liter of water, often expressed as 1:18 by weight. Many brewers prefer 1:15–1:16 for press since the metal filter carries more oils and body.
How Many Grams Of Coffee Beans For A French Press? By Press Size
People search for this exact phrase all the time: how many grams of coffee beans for a french press? The math below gives fast, reliable doses for the most common press sizes using a balanced 1:16 ratio. If you like it bolder, use the 1:15 column. If you like it gentler, slide toward 1:17–1:18.
Quick Doses For Common French Press Sizes
This first table lands early so you can brew right away. It shows water fill targets and matching coffee weights. Round to the nearest gram—taste won’t suffer.
| Press Size (Nominal) | Water Target | Coffee (1:16 / 1:15) |
|---|---|---|
| 8 oz (240 ml) | 240 g | 15 g / 16 g |
| 12 oz (350 ml) | 350 g | 22 g / 23 g |
| 17 oz (500 ml) | 500 g | 31 g / 33 g |
| 24 oz (700 ml) | 700 g | 44 g / 47 g |
| 32–34 oz (1 L) | 1000 g | 62 g / 67 g |
| 48–51 oz (1.5 L) | 1500 g | 94 g / 100 g |
| 64 oz (1.9 L) | 1900 g | 119 g / 127 g |
Grind, Time, And Water: The Three Big Dials
Grind Size
A French press shines with a coarse, even grind. Aim for particles like flaky sea salt. Too fine and the cup goes muddy and bitter. Too coarse and the cup tastes hollow. If you still get silt, try a click or two coarser and skim the surface before you plunge.
Contact Time
Four minutes is the classic starting point. With a fresh roast and a coarse grind, that window extracts enough sugars and aromatics without pushing harshness. Many baristas steep 4 minutes, break, skim, wait 5–6 minutes, then press and pour.
Water Temperature
Heat water near the lower end of boiling—about 93–96°C (200–205°F). If you don’t have a thermometer, boil and wait 30–45 seconds. Very dark roasts can start slightly cooler. If your tap is very hard or very soft, use filtered water.
Step-By-Step French Press Brew
1) Weigh And Grind
Pick a ratio. For a first pass, go 1:16. Weigh the beans whole. Grind just before brewing.
2) Preheat
Warm the empty press with hot water and dump it. Preheating keeps the slurry hot so extraction stays steady.
3) Add Coffee And Pour Half The Water
Add the ground coffee. Start your timer and pour about half the water. Stir or swirl to wet every flake. Let it bloom for 30–45 seconds.
4) Finish The Pour
Add the rest of the water to your target weight. Pop the lid on to trap heat, but keep the plunger up. Let it steep.
5) Break, Skim, And Settle
At 4:00, gently push the crust down with a spoon. Skim the foam and loose grounds from the top. Let the press sit another 3–5 minutes so the fines fall.
6) Press And Serve
Press slowly until the filter meets the bed. Don’t force it. Pour into cups or a decanter. If you leave it in the press, it keeps extracting and can turn harsh.
The Logic Behind 55–60 g/L
The Specialty Coffee world converged on a brew zone that tastes balanced to most drinkers. In simple terms, you want enough dissolved coffee solids in the cup to feel sweet and full but not so much that the brew goes sludgy or harsh. A range of 55–60 grams per liter lands that balance for many beans and roast levels in immersion style brews like press. The SCA Gold Cup ratio anchors this range and pairs with a recommended brew-water temperature of about 93–96°C.
Dial It To Your Taste
Use A Strength Table As Your Guide
Not everyone wants the same strength. The table below translates common ratios into grams of coffee for several batch sizes. Pick a row, brew it, and note how it feels. Then bump the ratio up or down one notch next time. Small changes make a big difference in the cup.
Troubleshooting Common French Press Results
Too Bitter Or Dry
Grind coarser or shorten contact time. Very hot water can push bitterness, so aim near 93–94°C. If the press sat on the counter with the plunger down for a while, decant next time to stop extraction.
Too Sour Or Thin
Grind a notch finer or extend contact time by 30–60 seconds. You can also bump the ratio one step stronger. Some very light roasts need a longer rest after roasting before they taste sweet in press.
Muddy Texture
Check your grinder. Dull burrs make excess fines. Try a sifter, a coarser setting, or the settle-and-skim step. A clean filter screen also keeps silt down.
How To Convert Without A Scale
Scales are cheap and accurate, but you can brew without one. One level tablespoon of ground coffee is roughly 5 grams. One milliliter of water weighs one gram. So a 500 ml batch at 1:16 needs about 8 level tablespoons of grounds and two standard measuring cups of water. Treat this as a bridge until you grab a scale.
Water Quality And Temperature Tips
If your tap water tastes flat or metallic, your coffee will too. Filtered water with moderate mineral content tends to taste clear and sweet. Aim for hot but not raging water. Pouring just off boil keeps extraction smooth and reduces the odds of bitterness, especially with darker roasts.
Fitting The Ratio To Your Beans
Roast level changes how a ratio feels. Dark roasts extract faster and can taste intense at 1:15 in a press. Try 1:16–1:17 and a slightly cooler start. Light roasts often shine at 1:15–1:16 with a longer settle before plunging to keep clarity while still getting body. Origin and process matter too. A fruity natural may feel sweet at a lighter ratio while a washed Central stays lively at 1:16.
Strength Ratios At A Glance
Use this late-stage table to fine-tune after a few brews. It keeps to two batch sizes so you can repeat results.
| Ratio Target | Coffee For 500 ml | Coffee For 1 L |
|---|---|---|
| Light (1:17.5) | 29 g | 57 g |
| Balanced (1:16) | 31 g | 62 g |
| Full (1:15) | 33 g | 67 g |
| Bold (1:14) | 36 g | 71 g |
| Dessert Pairing (1:13) | 38 g | 77 g |
Sample Brew Plan You Can Repeat
Here’s a recipe you can tape to the grinder. Dose 31 g coffee and 500 g water (1:16). Grind coarse. Preheat. Start timer. Pour 200 g, stir to wet. At 0:45, pour to 500 g. Lid on. At 4:00, break and skim. Wait to 8–9 minutes. Press gently. Decant. For a stronger press, many pros use around 1:15; see this Blue Bottle 1:15 example for a 600 g batch. Keep notes each time.
Bring It Back To The Question
When friends ask, “how many grams of coffee beans for a french press?” you can now give a clear, quick answer with a path to adjust: start at 55–60 grams per liter, aim near 1:16, and move a click at a time based on taste. That simple loop makes your press repeatable.