Work out total soluble solids instantly with clear inputs, formula shown and shareable results.
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.
Temperature correction
Corrected Bx = reading + 0.0056 x (T - 20) + 0.00013 x (T - 20)^2
Ratio
Brix to acid ratio = TSS / titratable acidity
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.
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.