Chemistry Calculators
⚗️Discover powerful chemistry calculators for molecular weight, chemical reactions, solution concentrations, and everyday biochemical processes.
Biochemistry
General Chemistry
Atomic Mass Calculator
Calculate atomic mass and molecular weight of elements and compounds using isotopic abundance and mass numbers
Percent Composition Calculator
Calculate percent composition by mass of elements in chemical compounds and formulas
Empirical Formula Calculator
Determine empirical formula from percent composition or mass data of elements in compounds
Mole Calculator
Convert between moles, mass, and number of particles using molar mass.
Average Atomic Mass Calculator
Calculate the average atomic mass of an element from its isotopes and abundances.
Molar Mass Calculator
Calculate the molar mass of a compound from its chemical formula.
Stoichiometry
Limiting Reagent Calculator
Identify limiting reagent and calculate theoretical yield for chemical reactions and stoichiometry problems
Reaction Yield Calculator
Calculate theoretical yield, actual yield, and percent yield for chemical reactions
Mole Ratio Calculator
Calculate mole ratios between reactants and products in balanced chemical equations
Organic Chemistry
Functional Group Identifier
Identify functional groups in organic molecules and compounds for structure analysis
Degree of Unsaturation Calculator
Calculate degree of unsaturation (index of hydrogen deficiency) from molecular formula for organic structure determination
Formal Charge Calculator
Calculate the formal charge of an atom from valence, lone-pair, and bonding electrons.
Inorganic Chemistry
Physical Chemistry
Gas Law Calculator
Calculate gas properties using ideal gas law, combined gas law, and real gas equations
Reaction Rate Calculator
Calculate reaction rates, rate constants, and half-life for chemical kinetics and rate laws
pH Calculator
Calculate pH, pOH, and hydrogen/hydroxide ion concentration.
Half-Life Calculator
Calculate radioactive decay, remaining amount, half-life, or elapsed time.
Specific Heat Calculator
Calculate heat energy, mass, specific heat, or temperature change (q = mcΔT).
Arrhenius Equation Calculator
Calculate a reaction rate constant from activation energy, temperature, and the pre-exponential factor.
Equilibrium Constant Calculator
Calculate the equilibrium constant (Kc) from equilibrium concentrations and coefficients.
Analytical Chemistry
Dilution Factor Calculator
Calculate dilution factors and final concentrations for solution preparation in analytical chemistry
Calibration Curve Calculator
Create calibration curves and calculate unknown concentrations from standard solutions in analytical chemistry
Percent Error Calculator
Calculate percent error between an experimental value and the true value.
Henderson-Hasselbalch Calculator
Calculate buffer pH from pKa and the ratio of conjugate base to acid.
Solubility Product (Ksp) Calculator
Calculate the solubility product constant (Ksp) from molar solubility and salt stoichiometry.
Solutions and Concentrations
Molarity Calculator
Calculate molarity, moles, and volume for solution concentration calculations
Molality Calculator
Calculate molality, moles, and solvent mass for colligative properties and solution chemistry
Normality Calculator
Calculate normality and equivalent weight for acid-base and redox titration calculations
Solution Dilution Calculator
Solve the dilution equation C1V1 = C2V2 for any unknown.
PPM Calculator
Calculate parts per million (ppm) concentration and convert to percent and mg/L.
Mass Percent Calculator
Calculate the mass percent concentration of a solution.
Boiling Point Elevation Calculator
Calculate boiling point elevation of a solution from molality and the boiling-point constant.
Freezing Point Depression Calculator
Calculate freezing point depression from molality, the cryoscopic constant, and the van ’t Hoff factor.
Osmotic Pressure Calculator
Calculate the osmotic pressure of a solution from molarity, temperature, and the van ’t Hoff factor.
Chemical Thermodynamics
Gibbs Free Energy Calculator
Calculate Gibbs free energy change, spontaneity, and equilibrium for chemical reactions
Enthalpy Change Calculator
Calculate enthalpy change and heat of reaction using bond energies and thermochemical data
Bond Energy Calculator
Estimate a reaction enthalpy from the bond energies of bonds broken and formed.
Electrochemistry
Cell Potential Calculator
Calculate standard cell potential and EMF for electrochemical cells and redox reactions
Nernst Equation Calculator
Calculate cell potential under non-standard conditions using the Nernst equation for electrochemistry
Faraday's Law Calculator
Calculate the mass deposited in electrolysis using Faraday’s law.