Extraction Calculator
AdvancedAdvanced tool for calculating extraction yield and total dissolved solids (TDS). Perfect for coffee professionals and enthusiasts seeking precision.
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Extraction Calculator
Weight of ground coffee used
Total water used for brewing
Final weight of brewed coffee
Measure with a refractometer or TDS meter
Target Ranges
Extraction: 18-22%
TDS (Filter): 1.3-1.6%
Water Loss: 5-10%
Results
18.90%
Extraction Yield
✓ Ideal range
1.35%
TDS (Strength)
✓ Perfect strength
1:15.0
Brew Ratio
Coffee to water ratio
37.80g
Dissolved Coffee Solids
Total coffee extracted into cup
6.7%
Water Loss
Water absorbed by coffee grounds
Recommendations
• Excellent extraction - your coffee should taste balanced
• Perfect strength range
Understanding Coffee Extraction
Extraction Percentage
Measures how much coffee material dissolved into the water.
Target: 18-22%
• Under 18%: Sour, underdeveloped
• 18-22%: Balanced, sweet
• Over 22%: Bitter, over-extracted
• 18-22%: Balanced, sweet
• Over 22%: Bitter, over-extracted
Total Dissolved Solids (TDS)
Measures the concentration of coffee in your cup.
Filter Coffee: 1.15-1.55%
Espresso: 6-12%
Higher TDS = stronger coffee taste
Brew Ratio
The relationship between coffee dose and water amount.
Common Ratios:
• Pour Over: 1:15-1:17
• French Press: 1:15
• Espresso: 1:2-1:3
• French Press: 1:15
• Espresso: 1:2-1:3
Required Equipment
Essential
• Digital Scale (0.1g accuracy) - For precise measurements
• TDS Meter or Refractometer - To measure dissolved solids
• Timer - For consistent brew times
Professional
• Coffee Refractometer - More accurate than TDS meter
• Extraction Apps - For complex calculations
• Calibration Solutions - To maintain accuracy
Pro Tips
Target 18-22% extraction for most brewing methods
Use a refractometer for accurate TDS measurements
Higher extraction doesn't always mean better taste
Keep detailed brewing logs for consistency