AustraliaTier 2
Specific gravity to Brix converter
Enter either value — the other updates live, in both directions.
Free·No sign-up·Last checked 2026-08-27
Formula
Brix = 143.254 × SG³ − 648.670 × SG² + 1125.805 × SG − 620.389
SG (from Brix) solved numerically from the same cubic
Worked example. SG 1.050 → 12.4 °Bx.
Questions
Brix measures dissolved solids by weight, while specific gravity measures density relative to water — the relationship between the two is a cubic polynomial, not a straight line, so it curves slightly as concentration increases.
Yes — the SG/Brix relationship is a property of sugar solutions generally. It's used the same way whether you're reading a hydrometer or refractometer for beer wort, grape must or honey must.