What does Brew Ratio mean?
Definition: Coffee-to-water ratio explained simply
The brew ratio is the ratio of coffee to water. For example, 1:16 means 1 part coffee to 16 parts water. For pour-over coffee, this coffee-to-water ratio is the key factor in controlling flavor, strength, and clarity.
In practical terms, this means: If you use 20g of coffee, you brew it with 320g of water at a 1:16 ratio. Lower ratios like 1:15 taste stronger and fuller-bodied, while higher ratios like 1:17 are lighter, clearer, and more aromatic.
Yield and strength without technical jargon
Imagine two things:
- Total Dissolved Solids (TDS) : How concentrated your drink is – more dissolved solids taste more intense.
- Extraction yield : How much goodness you have extracted from the bean – ideally "enough", but not too much.
The ratio affects both: A smaller number (e.g., 1:15) increases the concentration in the beverage and can enhance the perception of sweetness and body. A larger number (e.g., 1:17) dilutes the beverage somewhat, emphasizing clarity and acidity. The "sweet spot" is found near the SCA Gold Cup (frequently cited: approximately 1.15–1.35% TDS, 18–22% yield) – you can get very close to it by taste alone, without any measuring equipment.
Quick start: Recommended ratios for hand filters
Standard recipes 1:15 to 1:17
- 1:15 : Stronger, more body, good for lighter coffees if you want to emphasize sweetness.
- 1:16 : Balanced – our all-rounder for many beans and V60 ratios.
- 1:17 : Lighter, clearer, ideal for fruity coffees and longer cups.
This range covers most pour over recipes – from the Hario V60 to Kalita to classic paper filters.
Guidelines based on cup size: 200 ml, 300 ml, 500 ml
- 200 ml (approx. 200 g water): 12–13 g coffee at 1:16.
- 300 ml (approx. 300 g water): 18–19 g coffee at 1:16.
- 500 ml (approx. 500 g water): 30–31 g coffee at 1:16.
These guidelines are a starting point. Adjust in 0.5 increments (e.g., 1:15.5) depending on the bean, grind size, and desired strength.
Influence on taste, body and clarity
Sour vs. bitter: what the ratio reveals
- Sour and weak : Often the ratio is too high (e.g., 1:18) or the grind is too coarse. Solution: Use a slightly lower brewing ratio (e.g., 1:16.5) or grind finer.
- Bitter and heavy : Often the ratio is too low (e.g., 1:14) or the grind is too fine. Solution: Increase the ratio (e.g., 1:16) or grind coarser.
- Flat (little sweetness, little aroma): Usually underextraction. Grind a little finer or slightly reduce the ratio (1:15.5).
- Woody/astringent : Indication of over-extraction. Grind coarser or increase the ratio (1:16.5–1:17).
Your hand-filter coffee ratio determines balance, body and clarity – always in combination with grind size, temperature and brewing time.
Variables: Grind size, roast, water, filter type
The brew ratio never works in isolation. These factors also play a role:
- Grind size : Finer = longer time, stronger grind; coarser = faster, lighter grind. Adjust here first, then fine-tune using the ratio.
- Roast level : Lighter roasts often benefit from a slightly lower ratio (1:15–1:15.5) or higher temperature; darker roasts feel comfortable at 1:16–1:17.
- Water : Minerals affect extraction. Balanced water (e.g., total hardness approx. 60–120 mg/l) makes adjustment easier.
- Filter type : V60 filter emphasizes clarity, Kalita flows more slowly and has a rounder effect; paper vs. fabric/metal affects oils and body.
Adjustments according to bean type, roast level and processing.
- Washed, light : Ratio 1:15–1:16, slightly hotter (92–96 °C), finer grind.
- Natural / Honey : 1:16–1:17 for clarity, moderate temperature (90–94 °C), not too fine.
- Darker roast : 1:16.5–1:17, temperature closer to 88–92 °C to tame bitterness.
Note: First stabilize the flow (grind size and pouring technique), then adjust the desired strength using the ratio.
Practical tip: How to calculate your brew ratio
Simple formula, examples and ratio table
Formula: Coffee grounds (g) = Target beverage (g water) ÷ Ratio . 1 ml water ≈ 1 g.
- Example 1: 300 g beverage at 1:16 → 300 ÷ 16 = 18.75 g coffee.
- Example 2: 500 g beverage at 1:15 → 500 ÷ 15 = 33.3 g coffee.
| beverage | 1:15 | 1:16 | 1:17 |
|---|---|---|---|
| 200 g | 13.3 g | 12.5 g | 11.8 g |
| 300 g | 20.0 g | 18.8 g | 17.6 g |
| 500 g | 33.3 g | 31.3 g | 29.4 g |
For a typical V60 ratio, you can start with 1:16 and adjust by ±0.5 to taste.
Seasonal recipes
Iced Pour Over (Japanese Method)
In the Japanese Iced Pour Over method, you brew hot water directly onto ice. Use approximately 60% hot water and 40% ice based on the target volume – this corresponds to a ratio of about 1:15.
- Example: 20 g coffee, 300 g beverage → 180 g hot water, 120 g ice.
- Grind size: slightly finer than hot, to maintain intensity.
- Watering: quickly, in 2-3 intervals to keep the temperature high.
Winter setup: hotter brewing temperature, stronger ratio
- Ratio: 1:15 to 1:15.5 for more body and sweetness.
- Temperature: 93–96 °C, especially for light roasts.
- Pouring profile: gently pulsating for even extraction.
This gives you a round cup with warmth, depth and lasting sweetness – perfect for cold days.
Step-by-step: Testing and fine-tuning the ratio
- Set basic recipe : Start with 1:16, 92–94 °C, medium grind, target time 2:30–3:15 min (Hario V60).
- Brew consistently : Same bean, same amount, same technique – only change one variable.
- Adjust in small steps : Shift the ratio by ±0.5, then taste again.
- Take notes : Pay attention to acidity, sweetness, body, and finish. Mark your favorite.
Mini-cupping at home for finding the ratio
Brew three small cups (150–200 g each) using ratios of 1:15, 1:16, and 1:17. Taste while lukewarm. This way you can taste what the ratio does to your coffee – without measuring devices.
Common errors and quick fixes
- If the mixture has passed through too quickly (watery, sour): Grind finer; if necessary, reduce the ratio (1:15.5).
- Too slow (bitter, dry): Grind coarser; increase the ratio (1:16.5–1:17).
- Uneven flow : Pour evenly, use swan neck, bloom for 30-40 seconds, then in circles.
- Inconsistent doses : Use digital scales, tare the target amount.
- Water quality fluctuates : Filtering or using constant mineralization makes any coffee extraction easier.
Tools & Recommendations
Digital scale, gooseneck kettle, hand mill
- Digital scale : Precise dose and water measurement – a prerequisite for reproducible ratios.
- Swan neck kettle : Controlled flow rate, better extraction.
- Good hand mill : Uniform particles, more stable throughput time.
Kaffanero filter coffees and hand filters
For clear, sweet cups, use fresh filter roasts like our coffee from Brazil or our coffee from Ethiopia – suitable for V60, Kalita, or classic paper filters. A precise scale and a fine pouring kettle will help you achieve the perfect brew ratio with ease. Try series tastings with two or three ratios of the same bean – this way you'll find your personal gem.
