Chemistry Calculators

Molecular weight calculator

Parse chemical formulas, hydrates, and nested groups to compute molar mass and composition.

Molar mass helper

Break down empirical or molecular formulas and export atomic contribution tables.

Stoichiometry calculator

Convert between moles, grams, and particles with balanced equation guidance.

Limiting reactant

Identify the limiting reagent, theoretical yield, and excess remaining for reactions.

Percent yield

Compare actual versus theoretical yield with limiting reactant integration.

Grams to moles

Convert sample mass into amount of substance using molar mass lookups.

Moles to grams

Scale products and reactants with automatic molar mass lookup and rounding.

Equation balancer

Balance chemical equations, format states, and download LaTeX-friendly output.

Empirical formula

Find simplest whole-number ratios from percent composition or elemental mass.

Percent composition

Calculate mass percent of each element in a compound or mixture.

Molarity calculator

Compute solution molarity, required solute mass, or solvent volume interchangeably.

Solution dilution

Apply C1V1 = C2V2 for quick dilution series or single-step adjustments.

Serial dilution planner

Design multi-step dilutions with tube-by-tube volumes and cumulative factors.

Titration curve

Simulate acid-base titrations with equivalence points, buffer regions, and charts.

Ph calculator

Determine pH, pOH, [H+], and [OH-] for strong acids/bases and dilute solutions.

Henderson–hasselbalch

Model buffer pH from pKa and conjugate acid-base ratios with unit conversions.

Beer–lambert law

Relate absorbance, concentration, path length, and molar absorptivity.

Arrhenius equation

Estimate reaction rates or activation energy from temperature-dependent kinetics.

Ideal gas law

Solve PV = nRT for any variable with unit-aware conversions and STP presets.

Van 't hoff factor

Evaluate colligative properties, dissociation, and freezing point depression impacts.

Nernst equation

Predict electrode potentials under non-standard conditions with log-based outputs.

Electronegativity difference

Assess bond polarity, ionic character, and dominant interaction type.

Gibbs free energy

Relate Delta G, Delta H, Delta S, and temperature to determine reaction spontaneity.

Isotope abundance

Derive average atomic mass from isotope masses and fractional abundances.

Born–haber cycle

Assemble lattice energies from enthalpy changes in ionic compound formation.

Percent error

Quantify analytical accuracy with signed or absolute percent error outputs.

Fick's law of diffusion calculator | life and earth sciences

Calculate diffusion rates using Fick