Calculateur d'Extraction Espresso — Formule

## 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.