Brix & Potential Alcohol — spirits.earth.ge

Input type Brix (°Bx) Assumed final gravity (FG)

FG=1.000 assumes complete, "to dry" fermentation. Adjust if your yeast typically stops at a higher FG.

Original Gravity (OG) Final Gravity (FG)

Current gravity (SG) Target potential ABV (%) Volume (L)

Result

Specific Gravity (SG)—

Brix (°Bx)—

Potential ABVsimple—

Potential ABVprecise—

Both formulas are explained in the Theory tab. They converge at low gravity, diverge at high gravity.

Potential ABV vs Brix

Result

Actual ABVsimple—

Actual ABVprecise—

Apparent Attenuation (AA%)—

Gravity Points (GP)—

Result

Target Gravity (SG)—

Required increase (GP)—

Sugar needed—

Calculated using an empirical coefficient of ≈2.6 g/L per GP (see Theory, part 3). Industrial-precision work needs iterative correction for volume change.

Reference Table

Brix	SG	Pot. ABV (simple)	Pot. ABV (precise)