Chemistry Calculators
Work through molarity, dilutions, and reaction yields.
128 free calculators
Lab Math Without the Lab Notebook
Chemistry calculations have a reputation for being tedious — not because the concepts are hard, but because the unit conversions and sig fig management are easy to mess up. These tools let you focus on understanding the chemistry while the arithmetic takes care of itself.
Essential Lab Calculations
The dilution calculator is by far the most-used tool here, implementing the C₁V₁ = C₂V₂ formula that comes up in every wet lab. The average atomic mass calculator handles isotope abundance problems that are standard in general chemistry courses. For chromatography work, the RF value calculator computes retention factors from your TLC plate measurements.
Solutions and Concentrations
Molarity, molality, normality, mass percent — there are too many ways to express concentration, and converting between them requires careful attention to molar masses and solution densities. The calculators in this section handle the conversion chains so you can focus on your experimental design.
Beyond the Classroom
If you're working in a research or industrial lab, you'll also want the column volume calculator for chromatography column sizing. For the physics behind chemical processes — enthalpy, entropy, Gibbs free energy — check our physics section. And if you need statistical analysis for your experimental data, the statistics tools cover standard deviation, confidence intervals, and hypothesis testing.