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French Press Ratio Calculator
Pick your press size and strength — get the exact coarse-ground coffee and water to use, every time.
By Michael Anderson
Last Updated: September 21, 2026
French press runs stronger than drip coffee by design — full immersion and no paper filter both add body. Pick your press size and how bold you want the cup, and this calculator gives you the exact grounds and water to measure out.
Calculate Your French Press Ratio
1:13.5 · Balanced
Strong (1:12)Light (1:15)
Coarse-ground coffee
37.0 g
Water (just off boil)
500 ml (16.9 oz)
Steep time
4 min
Water just off the boil (~200°F / 93°C), full 4-minute steep — fine-tune strength in 30-second increments before changing the ratio.
Get the Coarse, Even Grind French Press Needs
A blade grinder produces uneven chunks that clog the mesh filter and leave sediment in the cup. These burr grinders give the uniform coarse grind French press depends on.
4.6· $199-$299
Baratza Encore ESPAn electric grinder with stepless micro-adjustment under $250 and Baratza's repair-friendly design, spanning espresso through French press.
4.4· $179-$199
Breville Smart Grinder ProA versatile electric grinder for both espresso and filter coffee, with a Dosing IQ feature for consistent shot-to-shot repeatability.
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Why French press needs a different ratio than drip
A drip machine or pour-over cone passes hot water through the grounds once and then the grounds are discarded — the water and coffee are only in contact for a few minutes at most, and a paper filter strips out the coffee's natural oils and fine sediment along the way.
A French press works differently: the grounds sit fully submerged in the water for the entire steep, and the metal mesh filter lets oils and some fine particles through into the final cup. Both of those differences add strength and body, which is why the same 1:16 ratio that works well for drip would taste noticeably thin in a French press. Most recipes compensate by using more coffee relative to water — typically 1:12 to 1:15.
Common French press mistakes that ratio alone won't fix
- Grind too fine. Lets grounds slip through the mesh and over-extracts during the long steep, causing sediment and bitterness.
- Water too hot. Water straight off a rolling boil (212°F) can scorch the grounds — let it rest 30 seconds off the heat first, targeting around 200°F.
- Leaving the plunger down after pressing. Coffee left in contact with the grounds keeps extracting even after plunging — decant into a carafe or mugs right away.
Frequently Asked Questions
Most French press recipes land between 1:12 and 1:15, noticeably stronger than the 1:16-1:18 used for drip coffee.
A balanced starting point is 1:13.5 — a full-bodied cup without going syrupy.
Go toward 1:12 for a bolder cup or 1:15 if 1:13.5 tastes too heavy.
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