Titration Concentration Calculator
Titration finds the concentration of an unknown analyte by reacting it with a titrant of known concentration until the equivalence point. At that point the moles of titrant added, scaled by the mole ratio of analyte to titrant from the balanced reaction, equal the moles of analyte present. Dividing by the analyte volume gives its concentration. This calculator takes the titrant concentration and volume, the analyte volume, and the analyte-to-titrant mole ratio, and reports the analyte concentration along with the moles reacted. Keep both volumes in the same unit.
Titration formula
moles titrant = C titrant * V titrant
moles analyte = moles titrant * (analyte : titrant ratio)
C analyte = moles analyte / V analyte
(volumes must share the same unit so they cancel)
All values must be greater than zero. Volumes cancel as a ratio, so any common volume unit works; the result takes its concentration unit from the titrant.
Titration context
- At the equivalence point the titrant has exactly reacted with all the analyte.
- The mole ratio comes from the balanced neutralization or redox equation.
- A strong monoprotic acid and strong base react in a 1-to-1 ratio.
- A diprotic acid needs twice the monohydroxide base, giving an analyte-to-titrant ratio of 0.5.
- The endpoint, shown by an indicator or meter, approximates the equivalence point.
Titration: frequently asked questions
How do I find concentration from a titration?
At the endpoint, moles of titrant times the mole ratio of analyte to titrant equals moles of analyte. Divide that by the analyte volume to get its concentration: C analyte = (C titrant x V titrant x ratio) / V analyte.
What is the mole ratio in a titration?
The mole ratio is the ratio of analyte moles to titrant moles from the balanced reaction. For a strong monoprotic acid neutralized by a strong base the ratio is 1, but for a diprotic acid reacting with a monohydroxide base it is 0.5.
What is the equivalence point?
The equivalence point is where the titrant has exactly reacted with all the analyte, according to the stoichiometric mole ratio. The endpoint, signaled by an indicator or a meter, is chosen to fall as close as possible to the equivalence point.
Do titrant and analyte volumes need the same units?
The two volumes must be in the same unit so they cancel correctly, for example both in milliliters or both in liters. The titrant concentration sets the concentration unit of the result, typically moles per liter.
What does a 1-to-1 mole ratio mean for the math?
With a 1-to-1 ratio the moles of titrant equal the moles of analyte at the endpoint, so the concentration formula simplifies to C analyte = C titrant x V titrant / V analyte. Set the ratio to 1 for strong monoprotic acid-base titrations.
Official sources
- IUPAC Gold Book: titration, equivalence point and concentration terms.
- NIST: measurement and standard reference resources.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.