What the calculator computes
An animated fermentation tank: CO₂ bubbles, foam, an airlock, a cooling jacket and gauges. The curve shows sugar falling, alcohol rising and the temperature changing; the time slider and the cursor over the curve rewind the fermentation, and the temperature setpoint can be dragged right on the tank.
Set the volume, must sugar content, nitrogen, yeast, temperature setpoint and cooling power — you get the time to dryness, alcohol strength, residual sugar, maximum temperature, peak heat release, CO₂ and cooling energy, and warnings about stalling and overheating. The model is indicative.