Titration Calculator 2026 — GlobalCalc

GlobalCalc

Inputs

Titrant concentration

mol/L

Titrant volume used (titre)

Sample volume

Moles of titrant per mole of analyte

1 for HCl + NaOH; 2 for H₂SO₄ + NaOH; 0.5 for NaOH titrated against H₂SO₄.

Results update as you type

Results

Analyte concentration

0.0936 mol/L

Moles of titrant—

Moles of analyte in the sample—

If the analyte is HCl: g/L—

Reviewed September 2026. Chemistry is the same in every country: SI and laboratory units throughout.

All calculations run 100% in your browser. The calculator code does not submit your figures to GlobalCalc to obtain a result.

About titration

Method

How the titration calculator works

At the end point the moles of titrant equal the moles of analyte times the stoichiometric ratio. Moles of titrant = molarity × volume; divide by the ratio and by the sample volume to get the analyte concentration. For HCl with NaOH the ratio is 1:1; for H₂SO₄ with NaOH two moles of base neutralize one of acid, so the ratio is 2.

Formula: C_analyte = (C_titrant × V_titrant) ÷ ratio ÷ V_analyte

Data

Worked examples

Inputs	Analyte concentration	Note
23.4 mL of 0.1 M NaOH neutralises 25 mL of HCl	0.0936 mol/L	0.0936 M HCl
18.7 mL of 0.1 M NaOH vs 25 mL of H₂SO₄	0.0374 mol/L	0.0374 M H₂SO₄
12.5 mL of 0.05 M HCl vs 10 mL of NaOH	0.0625 mol/L	0.0625 M NaOH

FAQ

Frequently asked questions

What is the mole ratio?

From the balanced equation: H₂SO₄ + 2 NaOH → Na₂SO₄ + 2 H₂O needs two moles of NaOH per mole of acid, so the ratio is 2 when NaOH is the titrant.

Should I average my titres?

Yes — use the mean of concordant titres (within 0.1 mL), ignoring the rough first one.

Does the indicator matter for the calculation?

Not for the arithmetic, but the right indicator makes the end point match the equivalence point: phenolphthalein for strong acid–strong base, methyl orange when the base is weak.

How do I get the concentration in g/L?

Multiply the molarity by the analyte's molar mass; the HCl row does that with 36.46 g/mol.

Sources

Where these figures come from

IUPAC — Standard atomic weights (2021 conventional values) — the molar-mass table
NIST — CODATA 2018 fundamental physical constants — Avogadro constant, gas constant, speed of light
NIST Chemistry WebBook — thermochemical data
National Institute of Standards and Technology — the US measurement and reference-data authority

Last checked: September 2026. Atomic masses are the IUPAC conventional values; constants are CODATA 2018; equations are the standard textbook forms.