What is the ratio of water to coffee?

SCA Golden Ratio: 1:15 to 1:18 by weight (60g coffee per 1000mL water). Pour-over (V60/Chemex): 1:15-17. French press: 1:12-15 (stronger). Espresso: 1:2 (18g coffee → 36g espresso). Cold brew concentrate: 1:5. Always weigh — volume scoops vary 20%+.

The full answer

Coffee-to-water ratio is the single most important variable in brewing — more than grind size, water temperature, or technique. The Specialty Coffee Association (SCA) "Golden Ratio" of 1:18 produces balanced, textured coffee. Stronger or weaker brews shift the ratio. The math is universal: weigh your coffee in grams, multiply by 15-18 for water in grams (1mL water = 1g).

**The SCA Golden Ratio:**

- **1:15 to 1:18 coffee-to-water by weight** - Standard reference: **60g coffee per 1L (1000g) water** = 1:16.6 ratio - Why this range: produces 18-22% "extraction yield" — the chemical extraction sweet spot - Below this range (less water): under-extracted, sour, weak body - Above this range (more water): over-extracted, bitter, harsh

**By brew method:**

**Pour-over (V60, Chemex, Kalita Wave):**

- **Standard:** 1:16-17 (60g coffee per 1000mL water) - **Specific recipes:** - James Hoffmann V60: **30g coffee : 500g water = 1:16.67** - Tetsu Kasuya 4:6 V60: 1:15 - Scott Rao V60: 1:16.5 - Chemex: 1:17 (longer brew + paper filter = absorbs some water) - **Result:** balanced, articulate flavor; clarity

**French press:**

- **Stronger:** 1:12-15 - **Standard:** 1:14 (75g coffee per 1L) - **Method:** 4-min steep + plunge - **Note:** lower ratio than pour-over because grounds + water sit together (immersion); higher concentration extraction

**AeroPress:**

- **Standard (inverted):** 1:14-16 - **Concentrate (dilute to taste):** 1:6-8 - **Hoffmann's recipe:** 11g coffee : 200g water = 1:18 - **Note:** highly variable depending on recipe

**Espresso:**

- **Standard:** 1:2 ratio (18g coffee → 36g espresso liquid) - **Ristretto:** 1:1 to 1:1.5 (18g → 18-27g, more concentrated) - **Lungo:** 1:3 to 1:4 (18g → 54-72g, more dilute) - **NOT water-to-grounds:** this is yield (espresso out)-to-dose (grounds in) - **Hot water added to coffee bed:** typically 1.5x dose by weight (18g grounds + ~27mL water → 36g espresso)

**Moka pot (stovetop):**

- **Standard:** fill basket + fill water to safety valve - **Approximate ratio:** 1:7-10 - **Method:** pressure-driven; thicker than pour-over, less concentrated than espresso

**Cold brew:**

- **Concentrate (to dilute):** 1:5 (200g coffee per 1L water) - **Ready-to-drink:** 1:8-10 - **Dilution after steep:** 1:1 with water/milk before serving - **Steep time:** 12-24 hours at room temp or fridge

**Cold drip / iced tower:**

- **Ratio:** 1:10-12 - **Drip rate:** 1 drop per second - **Time:** 3-12 hours

**Drip coffee maker (automatic):**

- **Standard:** 1:15-17 - **Per cup:** 10g coffee per 180mL water - **Issue:** machines often use less ratio than ideal (energy/speed tradeoff) - **Better result:** weigh both, fine-tune to taste

**Turkish coffee (cezve):**

- **Ratio:** 1:10 (10g per 100mL water) - **Method:** simmer + foam — very fine grind - **Strength:** very strong, with grounds

**Vietnamese phin filter:**

- **Standard:** 1:7-10 - **Concentrated:** mixed with sweetened condensed milk - **Method:** slow drip ~5-7 min

**The 1:1 mL/g water equivalence:**

Most beneficial cooking shortcut for coffee: - 1mL water = 1g water (close enough for cooking) - 500g water = 500mL water = 1/2 liter - This makes coffee math simple: 30g coffee + 480mL water = 1:16 ratio

**By cup size (standard 8oz/240mL "cup"):**

- **1 cup (240mL):** 14-16g coffee for 1:15-17 - **2 cups (480mL):** 28-32g coffee for 1:15-17 - **4 cups (960mL):** 56-64g coffee for 1:15-17 - **8 cups (1920mL / 65oz):** 115-128g coffee for 1:15-17

**Per-cup brewing reference:**

- **Espresso single shot:** 7-9g coffee → 14-18g espresso (1:2) - **Espresso double:** 16-18g → 32-36g - **Pour-over (1 cup):** 15g coffee : 240g water = 1:16 - **French press (1 cup):** 17g coffee : 240g water = 1:14 - **Drip machine (1 cup):** 14g : 240g = 1:17 (standard)

**Strength vs extraction (different things):**

- **Strength = ratio** (concentration in cup). 1:15 = stronger; 1:18 = weaker - **Extraction = how much coffee dissolved into water** (18-22% = sweet spot) - You can brew strong AND under-extracted (more grounds, short brew); or weak AND well-extracted (less grounds, long brew) - Both ratio AND grind size + time control both

**Why weighing beats scooping:**

- **1 standard coffee scoop = 10g** (varies by brand: 7-12g) - **1 tbsp ground coffee = 5-7g** (varies by grind) - **1 oz coffee = 28.35g** (universal weight)

A "2 scoops" recipe could be 14-24g — 71% range. Weighing eliminates this variation.

**By coffee type/origin:**

The ratio is universal — doesn't change with origin (Ethiopian vs Brazilian, etc.). What does change: - **Roast level:** darker roasts dissolve faster → use slightly less coffee (1:17 vs 1:16) - **Bean density:** denser beans (high-altitude) extract slower → slightly more time, same ratio - **Bean age:** fresh beans (7-14 days post-roast) extract more efficiently than stale

**Grind size + ratio interaction:**

Ratio is correct; grind tunes extraction: - **Too sour/sharp:** grind FINER (smaller particles, more surface area, more extraction) - **Too bitter/dry:** grind COARSER (less extraction) - **Don't fix sour by adding more coffee** — fix grind first

**Practical recipes (Hoffmann method, scalable):**

**V60 — 500g water serving (typically 2 cups):**

- **Coffee:** 30g medium grind - **Water:** 500g at 96°C (205°F) - **Brew time:** 3-4 minutes - **Pour pattern:** - 0:00 → 60g (bloom) - 0:45 → up to 300g - 1:30 → up to 500g - 2:30 → finish drawdown - **Result:** balanced, articulate cup

**Single-mug Chemex — 250g water:**

- **Coffee:** 16g - **Water:** 250g at 96°C - **Brew time:** 3 min - **Result:** clean, light body

**French press — 750g water (3 cups):**

- **Coffee:** 60g coarse grind - **Water:** 750g at 90-96°C - **Steep:** 4 min, plunge slowly - **Result:** full body, oils preserved

**Espresso (commercial standard double):**

- **Coffee:** 18g (in portafilter) - **Water added by espresso machine:** ~27mL passing through coffee bed - **Output:** 36g espresso (1:2 yield ratio) - **Time:** 25-30 seconds total extraction

**Common mistakes:**

- **Using too few grounds:** under-extracted; sour - **Using too many grounds:** over-concentrated; harsh - **Volume measurement (scoops/tbsp):** wildly variable - **Wrong grind for method:** medium-coarse for French press; fine for espresso - **Wrong water temperature:** 90-96°C (195-205°F) is the brewing sweet spot - **Pre-ground coffee:** stales fast; whole-bean fresh-ground is the differentiator - **Tap water:** affects flavor; filtered or bottled spring water tastes cleaner

**The water-quality variable (often missed):**

SCA spec recommends: - **Total dissolved solids (TDS):** 150 mg/L (range 75-250) - **Hardness:** 4 grains (range 1-5) - **Chlorine:** 0 (chlorine kills coffee flavor) - **pH:** 7.0 (range 6.5-7.5)

For most home brewers: filtered tap water OR bottled spring water (Fiji is too low TDS; Volvic is good).

**By bean type:**

Same ratio works across: - **Light roasts:** 1:16-17 (longer extraction window) - **Medium roasts:** 1:16-17 (most forgiving) - **Dark roasts:** 1:15-17 (faster extraction) - **Decaf:** 1:15-17 (similar to caf; some prefer slightly stronger) - **Single-origin:** 1:16-17 (let the unique flavor show) - **Blends:** 1:15-17

**Don't:** - Brew coffee with boiling water (above 96°C/205°F over-extracts harshly) - Use volume scoops as your accuracy standard - Add water to already-brewed coffee to "stretch it" (just use weaker ratio next time) - Re-brew used grounds (mostly extracted; tastes bitter/empty) - Pre-grind coffee for a week+ ahead (stales rapidly)

**Cross-reference:** see /pages/how-to-convert/cups-to-grams for related measurement + /pages/what-temperature-for/water-boiling for brew temperatures + /pages/how-long-does/cooking-rice for related brew timing.

Most published references (Specialty Coffee Association "Golden Cup Standard", James Hoffmann "How to make the best coffee at home", "The World Atlas of Coffee", Scott Rao "Everything but Espresso", Tetsu Kasuya 4:6 method) converge on 1:16-17 as the universal pour-over sweet spot, 1:14-15 for French press immersion, and 1:2 yield for espresso. Strength preference within range is personal.

Time ranges by condition

What changes the time

• Brew method. Pour-over 1:16-17; French press 1:12-15; espresso 1:2 yield; cold brew 1:5-10
• Strength preference. 1:15 = stronger; 1:18 = weaker. Within range, personal taste
• Roast level. Darker roasts extract faster — slightly less coffee (1:17) than light (1:16)
• Water temperature. 90-96°C (195-205°F) ideal; boiling over-extracts
• Grind size. Wrong grind fixes via grind, not ratio change. Fine = espresso; medium = pour-over; coarse = French press

Common questions

Sources

We cite primary research, expert practice, and authoritative reference. Higher-tier sources weighted heavier. See methodology.

1. T2Specialty Coffee Association (SCA) Golden Cup Standard — Industry-standard 1:18 ratio + 18-22% extraction yield framework
2. T2James Hoffmann, "How to make the best coffee at home" — Modern home-brewing reference; V60 + Chemex + French press recipes
3. T2Scott Rao, "Everything but Espresso" — Pro-barista reference for filter coffee brewing
4. T3Harold McGee, "On Food and Cooking" — Coffee extraction chemistry + temperature physics

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