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ABV Calculator (OG → FG + Refractometer)

Calculate beer ABV from original and final gravity, with refractometer correction and attenuation %.

IBU Hop Bitterness Calculator (Tinseth & Rager)

Calculate IBUs from boil time, gravity, hop AA% and batch size using Tinseth or Rager utilisation.

Grain Bill, Mash & Strike Water Calculator

Plan a beer recipe: fermentables percentages, predicted OG, SRM colour, mash and strike water volumes.

Priming Sugar Calculator (Bottle Carbonation)

Grams of priming sugar for target CO₂ volumes by style, batch size and temperature.