Brix Conversion Calculator
Convert between Brix and Specific Gravity, and use the refractometer correction calculator to get accurate FG readings when alcohol is present.
Brix ↔ Specific Gravity
Refractometer FG Correction
A refractometer gives incorrect readings after fermentation because alcohol bends light differently than sugar. Enter your OG and FG Brix readings to get the corrected final gravity.
Reading before fermentation
Reading after fermentation (uncorrected)
Quick Reference
About Brix & Refractometers
Brix measures the sugar content of a solution as a percentage by weight. A refractometer reads in Brix and only needs a few drops of wort.
Why correct FG? After fermentation, alcohol in the sample changes the refractive index, making the refractometer read higher than the actual sugar content. You must apply a correction formula to get accurate post-fermentation readings.
Tip: For OG measurements (before fermentation), a refractometer is accurate and convenient. For FG, a hydrometer is more reliable — but if you only have a refractometer, use the correction calculator above.