Chemistry tools for chemists.
Calculators, cheat sheets, and worked examples across every corner of chemistry — for undergrads, grad students, and lab work.
Chemkit is a growing library of interactive chemistry tools organized by subdiscipline. Every calculator is unit-tested against textbook worked examples, ships with the equation it uses, and cites its physical constants (NIST, IUPAC, PubChem, CRC). No accounts, no ads shoved in your face, no tracking beyond basic analytics.
General
Everyday lab math — molarity, dilutions, molar mass, buffers, and serial dilutions. The bench toolkit every chemist reaches for daily.
- Molarity Calculator
Solve for mass, molecular weight, volume, or molar concentration in mol/L.
- Dilution Calculator
C₁V₁ = C₂V₂ — solve for any of the four dilution variables.
- Molar Mass Calculator
Type a chemical formula, get the molecular weight in g/mol.
- Buffer Calculator
Henderson-Hasselbalch pH from acid/base ratio, plus common recipes.
- Serial Dilution Calculator
Plan multi-step dilutions with per-step volumes and a stock check.
Organic
Reaction mechanisms, functional-group transformations, NMR and IR interpretation, and stereochemistry. Tools for orgo problem sets and synthesis planning land here as we build them.
No tools published in this section yet. Take a look at what's on the way, or head over to the Learn hub to study with the tools we do have.
Inorganic
Coordination chemistry, oxidation-state bookkeeping, crystal-field splitting, and solid-state stoichiometry. Ligand-field diagrams and Lewis-structure helpers are on the way.
No tools published in this section yet. Take a look at what's on the way, or head over to the Learn hub to study with the tools we do have.
Physical
Thermodynamics, kinetics, and equilibrium — Gibbs free energy, Arrhenius fits, rate-law solvers, and ideal/real-gas calculators are next up here.
- Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or temperature — every common unit.
Analytical
Titration curves, Beer–Lambert absorbance, chromatography retention, and calibration-curve regression. The instrument-side math a working analyst runs.
No tools published in this section yet. Take a look at what's on the way, or head over to the Learn hub to study with the tools we do have.
Biochem
Enzyme kinetics (Michaelis–Menten, Lineweaver–Burk), protein–ligand binding, nucleic-acid Tm, and biological buffer prep. Bench-biology math ships here.
No tools published in this section yet. Take a look at what's on the way, or head over to the Learn hub to study with the tools we do have.