How to dose a 1L French press?

For a 1-litre French press, the recommended ratio is 60 to 70 grams of coffee per 1,000 ml of water — roughly 1 level tablespoon (6–8g) per 100 ml. This ratio falls within the SCA range for filter coffee (55–65g/L). The grind should be coarse, like sea salt, and the steeping time 4 to 5 minutes at 92–96°C.

The French press (also called a cafetière or plunger) is one of the simplest and most widespread brewing methods in the world, among both amateurs and professionals. Its principle is total immersion: the grounds remain in contact with the water for the entire steeping duration before being separated by the plunger pressure. For a 1-litre capacity, dosing is crucial because an error of a few grams multiplied across ten cups will have a major impact on taste.

The base ratio: 60g/L (SCA filter coffee ratio) yields a balanced and accessible coffee. For a stronger brew, go up to 65–70g/L. For a lighter coffee suited to long drinking or palates unaccustomed to strong coffee, 50–55g/L is acceptable. The golden rule is to use a kitchen scale rather than volumetric measures (spoons) — the weight of ground coffee varies considerably depending on bean density and grind size.

The grind is coarse — coarser than for an electric filter, similar to coarse sea salt or coarse sugar. Too fine a grind produces a cloudy, gritty and over-extracted drink. Water temperature: 92 to 96°C (boiling water left to rest for 30–60 seconds). Procedure: pour a little hot water over the coffee for the bloom (30 seconds), then add the remaining water, stir gently, place the lid without pressing and wait 4 minutes. Press the plunger slowly (20–30 seconds). Pour immediately — never leave the coffee steeping longer with the grounds as it over-extracts.

For a 1L French press serving 4 people, the reference recipe is: 60g coffee + 1,000 ml water at 93°C, 4 minutes steeping, plunger pressed slowly. A surprising fact: the French press is one of the rare methods that allows coffee oils (cafestol and kahweol) to pass into the cup because there is no paper filter to trap them — giving it more body but also higher diterpene content, substances associated with a slight increase in blood cholesterol with high daily consumption.

French press recipes by capacity

The Arithmetic Behind a Satisfying Large Brew

Dosing a 1-litre French press correctly is a calculation that many home brewers approach by guesswork, often producing either weak, under-dosed brews or overpowering, over-extracted ones. The SCA Golden Cup standard recommends 55-65g of coffee per litre of brewing water as a general guideline, which for a 1-litre French press translates to 55-65g of medium-coarsely ground coffee. This range accounts for the variation in individual taste preference and coffee density: lighter, more porous roasts at the lower end of the range; denser, more intense coffees at the higher end. For most medium-roasted specialty coffees, 60g per litre is a reliable starting point that produces a full-bodied, satisfying result without tipping into over-extraction territory.

The complication for 1-litre French press dosing is that a 1-litre carafe cannot actually hold 1 litre of water plus 60g of coffee without overflow — the coffee grounds displace a volume of water and the bloom creates additional expansion. A practical adjustment is to use 900g of water (not 1000g) with 54-60g of coffee, which fills most 1-litre carafes to an appropriate level while maintaining the target ratio. Weighing both coffee and water on a kitchen scale rather than using volume measurements (tablespoons of coffee, cups of water) removes the ambiguity that drives inconsistency in home French press results — two "tablespoons" of coffee can vary by 50% in actual mass depending on grind size and how packed the tablespoon is, while a weighed 60g is always 60g regardless of how you scoop it.

Practical Recommendations

Once you have established your target dose, taste your brew at different times post-steep: at 3 minutes, 4 minutes, and 5 minutes (without plunging — just taste a small sample with a spoon). The progression from under-extracted brightness at 3 minutes to fully developed balance at 4 minutes and early over-extraction at 5 minutes will calibrate your palate to your specific equipment and coffee. Note that water temperature at the time of brewing affects extraction speed: if you pour at 90 °C rather than 95 °C, your optimal steep time may extend by 30-60 seconds. Seasonal temperature variation in your kitchen also affects this — water in a cold carafe in winter drops temperature faster than in summer, which subtly shifts the extraction dynamic over the same four-minute steep. Develop the habit of pre-heating your French press carafe with hot water before brewing to reduce temperature drop and produce more consistent results year-round.