Compute unknown concentration from titration. Free online Titration Calculator for chemistry — instant, accurate results, mobile-friendly, no signup needed.
[base] M
0.083333
Derivation
├── 01GivenVa = 25, Ma = 0.1, Vb = 30
├── 02Formulae.Va × e.Ma / e.Vb
├── 03Substitutee.25 × e.0.1 / e.30
└── 04Compute [base] M0.083333
Did you know?
Ratios appear in the earliest Greek mathematics (Eudoxus, 4th century BCE) as a way to compare incommensurable lengths without a concept of irrational numbers.
§01What is
Understanding the Titration Calculator
The Titration Calculator computes [base] M from 3 inputs: volume acid (ml), known [acid] m, volume base (ml). Compute unknown concentration from titration.
Chemistry turns grams and moles into reactions. Getting the stoichiometry, dilutions, or concentrations right is the difference between a lab result you can trust and one you can’t reproduce.
The Titration Calculator sits in that toolkit — it compute unknown concentration from titration. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.
§02The Formula
How it’s calculated
e.Va × e.Ma / e.Vb
Where
Va
Volume acid (mL)
Ma
Known [acid] M
Vb
Volume base (mL)
§03Practical Example
Step-by-step walkthrough
Scenario
Apply the formula to a realistic set of inputs: Volume acid (mL) = 25, Known [acid] M = 0.1, Volume base (mL) = 30.
01Start by noting the input — Volume acid (mL): 25.
02Start by noting the input — Known [acid] M: 0.1.
03Start by noting the input — Volume base (mL): 30.
04Substitute these values into the formula: e.Va × e.Ma / e.Vb
05Compute [base] M: the calculator returns 0.0833333.
06Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants
Common Titration Problems
The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.
01 · PATTERN
Volume acid (mL) halved
Va = 12.5 (from 25)
Keep every other input at its default and halve the volume acid (ml). See how [base] m responds.
01New Volume acid (mL): 12.5
02Baseline [base] M: 0.0833333
03New [base] M: 0.0416667
04[base] M decreases by 50% → use this sensitivity to plan for real-world variation.
02 · PATTERN
Volume acid (mL) doubled
Va = 50 (from 25)
Keep every other input at its default and double the volume acid (ml). See how [base] m responds.
01New Volume acid (mL): 50
02Baseline [base] M: 0.0833333
03New [base] M: 0.166667
04[base] M increases by 100% → use this sensitivity to plan for real-world variation.
03 · PATTERN
Known [acid] M halved
Ma = 0.05 (from 0.1)
Keep every other input at its default and halve the known [acid] m. See how [base] m responds.
01New Known [acid] M: 0.05
02Baseline [base] M: 0.0833333
03New [base] M: 0.0416667
04[base] M decreases by 50% → use this sensitivity to plan for real-world variation.
04 · PATTERN
Known [acid] M doubled
Ma = 0.2 (from 0.1)
Keep every other input at its default and double the known [acid] m. See how [base] m responds.
01New Known [acid] M: 0.2
02Baseline [base] M: 0.0833333
03New [base] M: 0.166667
04[base] M increases by 100% → use this sensitivity to plan for real-world variation.
§05FAQ
Frequently asked questions
Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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