Chemistry Calculators

Moles Calculator Convert between mass and moles using molar mass.

Molarity Calculator Find solution concentration in moles per litre.

Percent Yield Calculator Compare actual yield to theoretical yield.

Percent Composition Calculator Find an element's mass percentage in a compound.

Ideal Gas Law Calculator Solve PV = nRT for the number of moles.

Boyle's Law Calculator Find a new gas volume after a pressure change.

Moles to Atoms Converter Convert moles into the number of particles.

Atoms to Moles Converter Convert a number of particles into moles.

Effective Nuclear Charge Calculator Find effective nuclear charge from protons and shielding.

Average Atomic Mass Calculator Find average atomic mass from two isotopes.

Electronegativity Difference Calculator Classify a bond from electronegativity difference.

Atom Calculator Find protons, neutrons and electrons of an atom or ion.

Atomic Mass Calculator Find mass number from protons and neutrons.

Bond Order Calculator Find bond order from bonding and antibonding electrons.

Electron Configuration Calculator Find the electron configuration for an atomic number.

Molar Mass Calculator Find the molar mass of a chemical formula.

Percent Ionic Character Calculator Estimate ionic character from electronegativity difference.

pKa Calculator Convert between Ka and pKa.

Molality Calculator Find molality from moles of solute and mass of solvent.

Normality Calculator Find normality from molarity and equivalents.

Molar Mass of Gas Calculator Find a gas's molar mass from its density.

PPM to Molarity Calculator Convert a ppm concentration to molarity.

Theoretical Yield Calculator Find the maximum product mass from the limiting reactant.

Actual Yield Calculator Find actual yield from theoretical yield and percent yield.

Atom Economy Calculator Find how efficiently atoms become the desired product.

Air-Fuel Ratio (AFR) Calculator Find the air-to-fuel mass ratio.

Empirical Formula Calculator Find the simplest whole-number mole ratio of elements.

Grams to Moles Calculator Convert a mass to moles using molar mass.

Hydrogen Ion Concentration Calculator Find [H⁺] from pH.

Solution Dilution Calculator Find how much stock solution to dilute to a target concentration.

pH Calculator Find pH and pOH from hydrogen ion concentration.

Mass Percent Calculator Find the mass percent of a solute in a solution.

Mole Fraction Calculator Find the mole fraction of a component.

Dilution Factor Calculator Find the dilution factor from initial and final volume.

Serial Dilution Calculator Find the final concentration after several dilution steps.

Buffer pH Calculator (Henderson-Hasselbalch) Find buffer pH from pKa and the acid/base ratio.

Percent Solution Calculator Find % w/v concentration of a solution.

PPM Calculator Find concentration in parts per million.

pOH Calculator Find pOH and pH from hydroxide concentration.

Water Hardness Calculator Classify water hardness from CaCO₃ concentration.

TDS Calculator Estimate total dissolved solids from conductivity.

Molarity from Mass Calculator Find molarity from solute mass, molar mass and volume.

Activity Coefficient Calculator Estimate an ion's activity coefficient (Debye-Hückel).

Alligation Calculator Find mixing parts to reach a target concentration.

Bleach Dilution Calculator Find bleach to add for a target ppm.

Buffer Capacity Calculator Estimate a buffer's resistance to pH change.

Concentration Calculator Find concentration from solute mass and volume.

Neutralization Calculator Find acid/base volume needed for neutralization.

Percent Concentration to Molarity Calculator Convert a % w/w concentration to molarity.

Raoult's Law Calculator Find a solution's vapor pressure.

Reconstitution Calculator Find concentration after adding diluent to a powder.

Saponification Value Calculator Find SAP value from a fat's molar mass.

Titration Calculator Find unknown concentration from titration data.

Arrhenius Equation Calculator Find a rate constant from activation energy and temperature.

Reaction Quotient Calculator Find the reaction quotient Q from concentrations.

Molar Ratio Calculator Find moles of one species from a balanced ratio.

Activation Energy Calculator Find activation energy from rate constants at two temperatures.

Equilibrium Constant Calculator Find Kc from product and reactant concentrations.

Kp Calculator Convert Kc to Kp for gas-phase equilibria.

Rate Constant Calculator Find a first-order rate constant from half-life.

Gibbs Free Energy Calculator Find ΔG and whether a reaction is spontaneous.

Boiling Point Elevation Calculator Find how much a solute raises the boiling point.

Freezing Point Depression Calculator Find how much a solute lowers the freezing point.

Q10 Temperature Coefficient Calculator Find how rate changes per 10 °C.

Boiling Point Calculator Find boiling point at a new pressure (Clausius-Clapeyron).

Boiling Point at Altitude Calculator Find water's boiling point at a given altitude.

Entropy Calculator Find entropy change from heat and temperature.

Gibbs' Phase Rule Calculator Find degrees of freedom of a system.

Heat of Combustion Calculator Find energy released per mole of fuel.

STP Calculator Find gas volume at standard temperature and pressure.

Vapor Pressure Calculator Find vapor pressure at a new temperature (Clausius-Clapeyron).

Vapor Pressure of Water Calculator Find water's vapor pressure at a temperature.

Nernst Equation Calculator Find cell potential under non-standard conditions.

Cell EMF Calculator Find a cell's standard EMF from electrode potentials.

Electrolysis Calculator Find mass deposited by electrolysis (Faraday's law).

Ionic Strength Calculator Find the ionic strength of a solution (two ions).

Lattice Energy Calculator Estimate lattice energy (Kapustinskii equation).

Half-Life Calculator Find the amount remaining after radioactive decay.

Osmotic Pressure Calculator Find osmotic pressure of a solution.

Partial Pressure Calculator Find a gas's partial pressure from its mole fraction.

Rate of Effusion Calculator Compare effusion rates with Graham's law.

Beer-Lambert Law Calculator Find concentration from absorbance.

Diffusion Coefficient Calculator Find a diffusion coefficient (Stokes-Einstein).

Langmuir Isotherm Calculator Find surface coverage from the Langmuir isotherm.

Radioactive Decay Calculator Find the amount remaining and decay constant.

Young-Laplace Equation Calculator Find the pressure difference across a curved surface.

Degree of Unsaturation Calculator Find rings + double bonds from a molecular formula.

Radiocarbon Dating Calculator Estimate age from remaining carbon-14.

Chemical Oxygen Demand (COD) Calculator Find COD from a titration.

Combustion Analysis Calculator Find C and H masses from CO₂ and H₂O produced.

Combustion Reaction Calculator Find O₂, CO₂ and H₂O for burning a hydrocarbon.

Crude Protein Calculator Estimate crude protein from nitrogen content.

Double Bond Equivalent Calculator Count rings + π bonds in a molecule.

Michaelis-Menten Calculator Find enzyme reaction velocity.

Calibration Curve Calculator Find concentration from a calibration line.

Enzyme Activity Calculator Find enzyme activity in units.

Isoelectric Point Calculator Find the pI from two pKa values.

Resuspension Calculator Find buffer volume to reach a target concentration.

Cubic Unit Cell Calculator Find crystal density from a cubic unit cell.

Detention Time Calculator Find how long fluid stays in a tank.

Hydraulic Retention Time Calculator Find the average time water spends in a reactor.

Miller Indices Calculator Find Miller indices from plane intercepts.