In the brewery

Homebrew calculator

ABV, bottling sugar, hop bitterness, colour and a hydrometer correction. Metric units, with the formula under each result.

Original gravity

Before fermentation, such as 1.050.

Final gravity

When fermentation has finished, such as 1.010.

ABV

5.25%

Alternate formula: 5.34%.

Quick ABV = (original gravity − final gravity) × 131.25. The alternate figure is (76.08 × (OG − FG) / (1.775 − OG)) × (FG / 0.794). Both are estimates from a hydrometer, not a lab result.

Planning figures for a home brew. Measure the finished beer, and keep bottling carbonation under about 3 volumes unless the bottles are rated for more.