Chemistry Calculators

Thermochemistry Calculator

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

Chemistry

Stoichiometry Calculator

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

Chemistry

pH Calculator

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

Chemistry

Partial Pressure Calculator

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

Chemistry

Oxidation Number Calculator

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

Chemistry

Molecular Formula Calculator

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

Chemistry

Henderson-Hasselbalch Calculator

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

Chemistry

Gibbs Free Energy Calculator

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

Chemistry

Equilibrium Constant Calculator

Calculate equilibrium constants and reaction quotient comparisons from concentration data.

Chemistry

Entropy Change Calculator

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

Chemistry

Empirical Formula Calculator

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

Chemistry

Concentration Converter

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

Chemistry

Colligative Properties Calculator

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

Chemistry

Boiling Point Elevation Calculator

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

Chemistry

Acid-Base Neutralization Calculator

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

Chemistry

Van't Hoff Equilibrium Shift Calculator

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

Chemistry

pH Titration Buffer Calculator

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

Chemistry

Brewing ABV Calculator

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

Chemistry

Enthalpy Calculator

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

Chemistry

Ideal Gas Law Calculator

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

Chemistry

Molarity Calculator

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

Chemistry

Molecular Weight Calculator

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

Chemistry

Normality Calculator

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

Chemistry

Percent Yield Calculator

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

Chemistry

Rate Constant Calculator

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

Chemistry

Arrhenius Rate Constant Calculator - Temperature Reaction Sensitivity

Estimate reaction rate constants across temperatures using activation energy and Arrhenius kinetics.

Beer-Lambert Law Calculator - Absorbance and Concentration

Solve concentration or absorbance using molar absorptivity, path length, and Beer-Lambert law relationships.

Buffer pH Calculator

Free Buffer pH Calculator - Calculate buffer pH using Henderson-Hasselbalch equation.

Buffer Prep Solution Prep Calculator

Calculate buffer prep solid mass, stock dilution volume, and corrected prep values with purity and hydrate adjustments.

Cell Culture Media Solution Prep Calculator

Calculate cell culture media solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Chemical Half-Life Calculator

Free Chemical Half-Life Calculator - Calculate half-life for first-order reactions.

Combined Gas Law Calculator

Free Combined Gas Law Calculator - calculate combined gas law for chemistry problems. Accurate results using…

Diagnostic Reagent Solution Prep Calculator

Calculate diagnostic reagent solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Dilution Calculator

Free Dilution Calculator - Calculate dilution using C1V1=C2V2 formula for solutions.

Electrochemistry Calculator

Free Electrochemistry Calculator - Calculate cell potential and Gibbs free energy.

Electrolyte Stock Solution Prep Calculator

Calculate electrolyte stock solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Freezing Point Depression Calculator

Free Freezing Point Depression Calculator - calculate freezing point depression for chemistry problems. Accurate…

Lab Cleaning Solution Prep Calculator

Calculate lab cleaning solution solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Limiting Reagent Calculator

Free Limiting Reagent Calculator - Determine the limiting reagent in a chemical reaction.

Molar Mass Calculator

Free Molar Mass Calculator - Calculate the molar mass of chemical compounds from their formula.

Nernst Equation Cell Potential Calculator - Nonstandard Electrochemistry

Compute cell potential at nonstandard concentrations using standard potential, electron count, and reaction quotient.

Osmotic Pressure Calculator

Free Osmotic Pressure Calculator - Calculate osmotic pressure of solutions.

Percent Composition Calculator

Calculate percent composition by mass of elements in compounds

pH Adjustment Batch Solution Prep Calculator

Calculate ph adjustment batch solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

pH Calculator

Free pH Calculator - Calculate pH from hydrogen ion concentration or vice versa.

Pilot Batch Chemistry Solution Prep Calculator

Calculate pilot batch chemistry solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Quality Control Standard Solution Prep Calculator

Calculate quality control standard solid mass, stock dilution volume, and corrected prep values with purity and…

Reaction Rate Calculator

Free Reaction Rate Calculator - calculate reaction rate for chemistry problems. Accurate results using standard…

Reagent Dilution Solution Prep Calculator

Calculate reagent dilution solid mass, stock dilution volume, and corrected prep values with purity and hydrate…

Redox Reaction Balancer

Balance redox reactions using half-reaction method

Solubility Product Calculator

Free Solubility Product Calculator - calculate solubility product for chemistry problems. Accurate results using…

Titration Calculator

Calculate unknown concentration from titration data

Titration Standard Solution Prep Calculator

Titration Standard Solution Prep Calculator — fast, accurate results online. Enter your values and get instant answers.