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☕ Coffee Brew Ratio & TDS Lab

☕ Coffee Brew Ratio & TDS Lab

Specialty Coffee Association (SCA) Golden Cup extraction calculator. Computes precise dose, brew water yield, multi-stage pour intervals, grind microns, and theoretical extraction yield.

Total Water
297 g
~1.2 standard mugs
Grind Microns
Medium-Fine
550 - 750 µm
Target Yield
19.5%
SCA Ideal (18-22%)
⏱️ Multi-Stage Pour Schedule: Water Temp: 92°C - 94°C (198°F - 201°F)
1. Bloom (0:00-0:45)
54 g water
Degas CO₂ gently
2. Main Pour (0:45-1:45)
180 g total
Spiral concentric pour
3. Final Pour & Draw (2:45-3:15)
297 g total
Flat bed finish
Taste Diagnostic: Sour/weak? Grind finer or raise water temp. Bitter/astringent? Grind coarser or lower water temp.

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