Espresso Extraction Calculator

Calculate the espresso brew ratio, extraction percentage, and total dissolved solids (TDS) from dose, yield, and brew time.

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grams
grams
seconds
%

Brew Ratio

2.0 :1 (yield:dose)

Extraction Yield18.0 %
Flow Rate1.29 g/sec
Shot Type2 (1=ristretto 2=normale 3=lungo)
View formula & how it works →

How to Calculate Espresso Extraction

Key Formulas

Brew Ratio = Liquid Yield / Dose

Extraction % = TDS% x Yield / Dose

Brew Ratios

  • Ristretto: 1:1 to 1:1.5 (intense, concentrated)
  • Normale: 1:2 (standard espresso)
  • Lungo: 1:3+ (longer, more diluted)

    • Ideal Targets

  • Extraction yield: 18-22% (SCA standard)
  • TDS: 8-12% for espresso
  • Brew time: 25-30 seconds for a 1:2 ratio

    • Troubleshooting

    If extraction is too high (bitter): coarsen the grind or reduce dose. If too low (sour): fine the grind or increase dose.

    Example Calculation

    18 g dose, 36 g yield in 28 seconds, 9% TDS.

    1. 01Brew ratio = 36 / 18 = 2.0:1 (normale)
    2. 02Extraction = 9% x 36 / 18 = 18%
    3. 03Flow rate = 36 / 28 = 1.29 g/sec
    4. 04This is a well-balanced extraction within the ideal range.

    Frequently Asked Questions

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