For a French press, a reliable starting point is about 1:15 coffee to water by weight , which means 1 gram of coffee for every 15 grams (or milliliters) of water.

Quick Scoop: Core Ratio

  • Standard strength: 1:15 ratio (for example, 30 g coffee to 450 g/ml water).
  • Stronger brew: move toward 1:12–1:13 (more coffee per water).
  • Milder brew: move toward 1:16–1:17 (less coffee per water).

A handy rule: for every 250 ml (about 1 cup) of water, use 15–17 g of coffee and adjust after tasting.

How Much for Common Press Sizes

Here’s a practical guide based on common French press sizes.

[5][1] [7] [7] [3][7]
French press size Water Coffee (grams) Notes
Single mug (~350 ml) 350 ml 23–28 g Standard to strong (1:15 to ~1:12).
3‑cup press 275–300 ml 17–20 g Common beginner guide amount.
4‑cup press 430–500 ml 27–33 g Good for 1–2 people.
8‑cup press (~1 L) 800–1000 ml 54–60 g Typical recommendation is ~60 g/L.

Mini Guide: Dialing It In

  1. Start with 1:15 and a coarse grind (breadcrumbs/sea-salt size).
  1. Steep around 4–5 minutes , then plunge.
  1. Taste:
    • Too weak or watery → add 2–3 g more coffee next time.
 * Too bitter or heavy → use slightly less coffee, a coarser grind, or a shorter brew time.

Coffee forums and enthusiasts often land in the 55–60 g coffee per liter range, then tweak from there depending on roast and personal taste.

TL;DR: Start with 60 g coffee per 1 L water (1:15) , then adjust a little up for stronger or down for lighter until it tastes right to you.

Information gathered from public forums or data available on the internet and portrayed here.