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Brix To Specific Gravity Calculator

Work out brix to specific gravity instantly with clear inputs, formula shown and shareable results.

About Brix To Specific Gravity Calculator

Degrees Brix is grams of sucrose per 100 grams of solution. The standard conversion to specific gravity is SG = 1 + Bx / (258.6 - (Bx/258.2) x 227.1). Degrees Plato, used in brewing, is numerically almost identical to Brix. Refractometer readings must be temperature corrected unless the instrument compensates automatically.

Formulas

Brix to specific gravity

SG = 1 + Bx / (258.6 - (Bx / 258.2) x 227.1)

Solids mass

Solids (kg) = volume (L) x SG x Bx / 100

Worked example

With the default values below, Brix To Specific Gravity Calculator returns Specific Gravity of 1.048378. Change any input above and every figure here is recalculated in your browser.

Inputs used

Degrees Brixaccepts 0–90 Bx
12 Bx
Sample Temperatureminimum -10 degrees C
20 degrees C
Solution Volumeminimum 0 L
20 L
Instrument Reference Temperatureminimum -10 degrees C
20 degrees C

Results

Specific Gravity
1.048378
Temperature-Corrected Brix
12.0000
Dissolved Solids Mass
2.5161
Degrees Plato
12.000

Step by step

  1. 1Values used
  2. 2Brix to specific gravity
  3. 3Solids mass
  4. 4Specific Gravity= 1.048378
  5. 5Temperature-Corrected Brix= 12.0000
  6. 6Dissolved Solids Mass= 2.5161
  7. 7Degrees Plato= 12.000

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 6 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Is Brix the same as sugar content?

Only in a pure sucrose solution. In juice and wort, acids, salts and dissolved proteins also refract light, so Brix reads total soluble solids rather than sugar alone.

Why does alcohol invalidate Brix readings?

Ethanol has a lower refractive index than water, so a fermenting sample reads artificially low. Hydrometer or specialised correction formulae must be used once alcohol is present.

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