Coffee Extraction Yield Calculator
Calculate extraction yield from TDS measurements to determine if your coffee is properly extracted.
Coffee Extraction Yield Calculator
Calculate extraction yield from TDS measurements to determine if your coffee is properly extracted
Formula
Extraction % = (TDS × Beverage Weight) / Coffee DoseTDS (Total Dissolved Solids) is measured with a refractometer. Optimal extraction is 18-22% according to SCA standards.
How to Use
- 1Measure TDS — Use a coffee refractometer to measure your brewed coffee's Total Dissolved Solids (typical range: 1.15-1.55%).
- 2Enter coffee dose — Input the weight of coffee grounds you used in grams.
- 3Enter beverage weight — Input the weight of your brewed coffee (not the water used) in grams.
- 4View extraction yield — See your extraction percentage and whether it's under, optimal, or over-extracted.
- 5Follow recommendations — Adjust your brewing parameters based on the recommendations provided.
Frequently Asked Questions
What is coffee extraction yield?
Coffee extraction yield is the percentage of coffee grounds that dissolved into your brewed coffee. It is calculated using the formula: (TDS × Beverage Weight) / Coffee Dose × 100. The optimal extraction range is 18-22% according to SCA standards.
What is TDS in coffee?
TDS stands for Total Dissolved Solids, measured as a percentage of dissolved coffee solids in your brewed coffee. It is typically measured using a refractometer and ranges from 1.15% to 1.55% for optimal coffee.
What does under-extracted coffee mean?
Under-extracted coffee (extraction yield below 18%) means not enough flavor compounds were dissolved from the coffee grounds. This typically results in sour, acidic, or weak-tasting coffee. To fix under-extraction, try grinding finer, increasing water temperature, or extending brew time.
What does over-extracted coffee mean?
Over-extracted coffee (extraction yield above 22%) means too many compounds were dissolved from the coffee grounds, including bitter and astringent flavors. This results in harsh, bitter coffee. To fix over-extraction, try grinding coarser, lowering water temperature, or reducing brew time.
How do I measure TDS for this calculator?
TDS is measured using a coffee refractometer, which analyzes a sample of your brewed coffee. Simply place a drop of coffee on the refractometer sensor, and it will display the TDS percentage.