| Grain | Weight | Unit | PPG | °L |
|---|
Predicted OG · SRM
1.050 · 8 SRM
Total grain — · Strike water — qt @ — °F
| Grain | % | Gravity pts | MCU |
|---|
计算原理
OG: SG = 1 + (Σ weight_lb × PPG × eff%) / batch_gal / 1000.
Color (Morey): SRM = 1.4922 × MCU^0.6859, where MCU = Σ(weight_lb × °L) / gallons.
Strike water (Palmer): T_strike = (0.2 / R) × (T_mash − T_grain) + T_mash, where R = qt/lb mash thickness (default 1.3).
Common grain PPG/°L: 2-row 37/2, Maris Otter 38/3, Munich 37/10, Vienna 35/4, Crystal 60L 34/60, Chocolate 28/350, Black Patent 25/525, Roasted Barley 25/300, Wheat 37/2, Pilsner 37/1.8.