Chemistry Calculators

25 calculators for lab formulas, molarity, pH, dilution, and chemistry analysis.

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Thermochemistry Calculator

Calculate heat, enthalpy change, and reaction energy from mass, temperature, and heat capacity.

Stoichiometry Calculator

Calculate reactant and product quantities in chemical reactions using mole ratios from balanced equations.

Calculate pH from concentration, find H+ and OH- ion concentrations, and convert between pH and pOH for strong and weak acids and bases.

Partial Pressure Calculator

Calculate gas partial pressures from mole fraction, total pressure, or mixture composition.

Oxidation Number Calculator

Assign oxidation numbers and balance redox bookkeeping for elements in compounds.

Molecular Formula Calculator

Calculate the molecular formula from empirical formula mass and molar mass. Find the multiplier to convert empirical to molecular formula.

Henderson-Hasselbalch Calculator

Estimate buffer pH from pKa and acid-base concentrations using Henderson-Hasselbalch logic.

Gibbs Free Energy Calculator

Calculate Gibbs free energy from enthalpy, entropy, temperature, or equilibrium data.

Equilibrium Constant Calculator

Calculate equilibrium constants and reaction quotient comparisons from concentration data.

Entropy Change Calculator

Calculate entropy change for thermodynamic processes using the formula delta S = q/T for reversible heat transfer.

Empirical Formula Calculator

Calculate the simplest whole number ratio of atoms in a compound from percent composition or mass data.

Concentration Converter

Convert between molarity, molality, mass percent, mole fraction, and ppm. Essential for chemistry calculations.

Colligative Properties Calculator

Estimate boiling point, freezing point, vapor pressure, and osmotic effects from solute data.

Boiling Point Elevation Calculator

Calculate boiling point elevation from molality, van't Hoff factor, and solvent constant.

Acid-Base Neutralization Calculator

Calculate neutralization amounts, limiting reagent, and salt formation for acid-base reactions.

Van't Hoff Equilibrium Shift Calculator

Estimate equilibrium constant changes between temperatures using reaction enthalpy and Van't Hoff approximation.

pH Titration Buffer Calculator

Estimate buffer pH during weak-acid conjugate-base titration using pKa, acid moles, and added base moles.

Brewing ABV Calculator

Calculate brewing abv from chemistry inputs, formula relationships, units, and lab-ready result context.

Enthalpy Calculator

Calculate enthalpy from chemistry inputs, formula relationships, units, and lab-ready result context.

Ideal Gas Law Calculator

Calculate ideal gas law from chemistry inputs, formula relationships, units, and lab-ready result context.

Molarity Calculator

Calculate molarity from chemistry inputs, formula relationships, units, and lab-ready result context.

Molecular Weight Calculator

Calculate molecular weight from chemistry inputs, formula relationships, units, and lab-ready result context.

Normality Calculator

Calculate normality from chemistry inputs, formula relationships, units, and lab-ready result context.

Percent Yield Calculator

Calculate percent yield from chemistry inputs, formula relationships, units, and lab-ready result context.

Rate Constant Calculator

Calculate rate constant from chemistry inputs, formula relationships, units, and lab-ready result context.