Total Soluble Solids Calculator

Work out total soluble solids instantly with clear inputs, formula shown and shareable results.

About Total Soluble Solids Calculator

Total soluble solids is the temperature-corrected refractometer reading multiplied by any dilution applied. The Brix-to-acid ratio, not Brix alone, determines perceived sweetness and eating quality: citrus is typically acceptable above 10-12 and orange juice standards specify minimum ratios.

Formulas

Temperature correction

Corrected Bx = reading + 0.0056 x (T - 20) + 0.00013 x (T - 20)^2

Ratio

Brix to acid ratio = TSS / titratable acidity

Worked example

With the default values below, Total Soluble Solids Calculator returns Total Soluble Solids of 14.531. Change any input above and every figure here is recalculated in your browser.

Inputs used

Refractometer Readingaccepts 0–90 Bx: 14.5 Bx
Titratable Acidityminimum 0 % w/w: 0.6 % w/w
Sample Temperatureminimum -10 degrees C: 25 degrees C
Dilution Factorminimum 0.01: 1

Results

Total Soluble Solids: 14.531
Temperature-Corrected Reading: 14.531
Brix To Acid Ratio: 24.219
Maturity Assessment: Sweet - ripe

Step by step

1Values used
2Temperature correction
3Ratio
4Total Soluble Solids= 14.531
5Temperature-Corrected Reading= 14.531
6Brix To Acid Ratio= 24.219
7Maturity Assessment= Sweet - ripe

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 3 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

Why correct for temperature?

Refractive index falls with temperature. A reading taken at 30 C without correction understates Brix by roughly 0.07 units, which matters against a legal minimum.

Does TSS equal dry matter?

No. TSS measures dissolved solids only. Suspended pulp and insoluble fibre are not detected, so total solids by oven drying is always higher than TSS.