Brew Ratio¶
Brew Ratio
The relationship between coffee dose and water used, expressed as a ratio. Fundamental brewing parameter controlling strength and extraction. Typically written as 1:X (e.g., 1:15 means 1 gram coffee to 15 grams/ml water).
Coffee Dose
Amount of coffee used for brewing. Measured by weight in grams (never volume). Starting point for calculating brew ratio. Espresso typically 18-20g; pour-over 15-30g depending on yield.
Water Dose
Amount of water used for brewing. Measured by weight (grams) or volume (milliliters). For practical purposes, 1ml water = 1g weight. Determines final beverage strength with coffee dose.
Ratio Notation
Standard format: 1:X where 1 represents coffee and X represents water. Example: 1:16 ratio means 1g coffee for every 16g water. Sometimes written as coffee:water (e.g., 20:320).
Common Ratios by Method
Espresso Ratio
Typical range: 1:1.5 to 1:3
- Ristretto: 1:1 to 1:1.5
- Standard: 1:2 to 1:2.5
- Lungo: 1:3 to 1:4
Modern specialty: 1:2 to 1:2.5 most common
Pour-Over Ratio
Typical range: 1:15 to 1:17
- Strong: 1:14 to 1:15
- Standard: 1:15 to 1:16
- Mild: 1:17 to 1:18
Personal preference varies widely
French Press Ratio
Typical range: 1:12 to 1:17
- Strong: 1:12 to 1:14
- Standard: 1:15 to 1:16
- Mild: 1:17+
Immersion allows wider range
Cold Brew Ratio
Concentrate: 1:4 to 1:8
Ready-to-drink: 1:12 to 1:16
Wide variation based on intended use
AeroPress Ratio
Highly variable: 1:12 to 1:17
Depends on technique (standard, inverted, diluted)
Experimentation encouraged
Cupping Ratio
SCA Standard: 8.25g per 150ml (1:18.18)
Alternative: 55g per liter (1:18.18)
Consistency crucial for comparison
Calculating Ratios
From Ratio to Water Amount
Coffee × Ratio = Water
Example: 20g coffee at 1:16
20 × 16 = 320g water
From Coffee and Water to Ratio
Water ÷ Coffee = Ratio
Example: 300g water ÷ 20g coffee = 15
Ratio is 1:15
Scaling Recipes
Maintaining ratio while changing batch size
Double coffee = double water (ratio stays constant)
Example: 15g at 1:16 = 240g water
30g at 1:16 = 480g water
Brew Ratio vs Strength
Strength (TDS)
Concentration of dissolved solids in brewed coffee. Measured as percentage. Changed by altering ratio. Higher ratio (more water) = weaker strength; lower ratio = stronger strength.
Extraction Yield
Percentage of coffee mass extracted. Can remain constant across different ratios with grind adjustment. Independent variable from strength when properly controlled.
Ratio Triangle
Concept showing relationship between: ratio (strength control), grind size (extraction control), and final cup profile. Adjust both to achieve target.
Effect of Ratio Changes
Increasing Ratio (More Water)
Effect: Weaker/lighter beverage
TDS decreases
Extraction can stay constant (adjust grind finer)
More delicate, tea-like
Highlights brightness
Decreasing Ratio (Less Water)
Effect: Stronger/heavier beverage
TDS increases
Extraction can stay constant (adjust grind coarser)
More concentrated, intense
Emphasizes body
Personal Preference
Ratio choice is highly individual. Some prefer strong (1:14-15), others mild (1:17-18). Experiment to find preference. Can vary by coffee, origin, roast level.
Origin & Roast Considerations
Light Roasts
Often benefit from higher ratios (1:16-17). More water extracts delicate flavors. Lower concentration showcases brightness. Too strong can be overwhelming.
Dark Roasts
Often better with lower ratios (1:14-15). Higher concentration balances bitterness. Fuller body desired. Too weak can taste watery.
Fruit-Forward Origins
May prefer higher ratios to highlight acidity and fruit notes. Ethiopian, Kenyan coffees often shine at 1:16-17. Delicate flavors need space.
Chocolate/Nutty Origins
May prefer lower ratios emphasizing body. Brazilian, Indonesian coffees work well at 1:14-15. Richness enhanced by concentration.
Competition Standards
World Brewers Cup
Competitors specify exact ratios in recipes. Often unconventional ratios (1:13.5, 1:16.7, etc.). Precision matters at high level.
Barista Championships
Espresso ratios tightly controlled. Often document extraction yield and TDS targets. Ratio crucial to replication.
Common Misconceptions
"Stronger" Coffee
Doesn't always mean better. Strong = high TDS from ratio. Quality comes from proper extraction, not just strength. Weak but properly extracted can beat strong and under-extracted.
"Golden Ratio"
No universal perfect ratio. SCA suggests 1:18, but specialty coffee widely varies. Optimal ratio depends on: method, coffee, roast, preference. Experimentation essential.
Volume vs Weight
Always use weight (grams), not volume. Volume measures fail due to: bean density variations, grind settling, measurement imprecision. Scale essential for consistency.
Dose-Dependent Ratios
Some methods perform better at specific dose ranges. Espresso: 18-20g doses common. Pour-over: 15-30g depending on brewer. Scaling isn't always linear.
Practical Applications
Dialing In Process
1. Choose starting ratio (e.g., 1:16)
2. Adjust grind to achieve proper extraction
3. Taste - too weak/strong?
4. If extraction good but strength wrong, adjust ratio
5. Re-dial grind if needed
Consistency
Using precise ratio ensures reproducibility. Remove variable of "how much coffee" guesswork. Essential for quality control.
Recipe Development
Document ratios in recipes. Allows others to replicate. Example recipe: "20g coffee, 1:16 ratio, 320g water, 3:00 total time, 93°C"
Related Notes: - ../Coffee Terminology MoC