Titratable Acidity Calculator

Work out titratable acidity instantly with clear inputs, formula shown and shareable results.

About Titratable Acidity Calculator

Titratable acidity is titrant volume x normality x acid equivalent weight x 100, divided by sample size in milligrams. It must be reported as a named acid, because equivalent weights differ: citric 64.04, malic 67.05, tartaric 75.04 and lactic 90.08. The same titration gives different percentages depending on which acid is assumed.

Formula

Titratable acidity

TA % = titre (mL) x normality x equivalent weight x 100 / (sample x 1000)

Worked example

With the default values below, Titratable Acidity Calculator returns Titratable Acidity of 0.5379%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Titrant Volume Usedminimum 0 mL: 8.4 mL
Titrant Normalityminimum 0 N: 0.1 N
Sample Volume Or Massminimum 0 mL or g: 10 mL or g
Predominant Acidone of Citric acid (64.04), Malic acid (67.05), Tartaric acid (75.04), Lactic acid (90.08), Acetic acid (60.05): Citric acid (64.04)

Results

Titratable Acidity: 0.5379%
Acidity In Grams Per Litre: 5.3794
Milliequivalents Per Litre: 84.000
Equivalent Weight Used: 64.04

Step by step

1Values used
2Titratable acidity
3Titratable Acidity= 0.5379
4Acidity In Grams Per Litre= 5.3794
5Milliequivalents Per Litre= 84.000
6Equivalent Weight Used= 64.04

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 4 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

How does titratable acidity differ from pH?

pH measures free hydrogen ion activity; titratable acidity measures total acid available to be neutralised. A weakly dissociated acid can give high titratable acidity at modest pH, and buffering capacity depends on the latter.

What endpoint should be used?

pH 8.1-8.2 with a meter, or phenolphthalein to a faint pink for pale samples. Coloured juices and wines need a meter, since the visual endpoint cannot be seen.