Chemistry

99 calculators

Chemistry

Transparent chemistry and solution calculations.

Launch a calculator

99 available

Activation Energy Calculator

Calculate activation energy from two rate measurements and absolute temperatures.

Open

Actual Yield Calculator

Calculate percent yield from actual and theoretical product amounts.

Open

Air-Fuel Ratio Calculator

Calculate air-to-fuel mass ratio and lambda from explicit masses.

Open

Alligation Calculator

Blend low- and high-concentration sources to reach a target concentration.

Open

Arrhenius Equation Calculator

Predict a rate constant at a new absolute temperature.

Open

Atom Economy Calculator

Calculate atom economy from product and total reactant molar masses.

Open

Atomic Mass Number Calculator

Calculate mass number from proton and neutron counts.

Open

Average Atomic Mass Calculator

Calculate weighted average atomic mass for two isotopes.

Open

Avogadro Number Calculator

Convert moles to particles using the exact Avogadro constant.

Open

Beer-Lambert Law Calculator

Calculate absorbance from molar absorptivity, path length, and concentration.

Open

Bleach Dilution Calculator

Calculate stock bleach and water volumes using C1V1 = C2V2.

Open

Boiling-Point Elevation Calculator

Calculate colligative boiling-point elevation from molality, Kb, and van't Hoff factor.

Open

Bond Order Calculator

Calculate molecular-orbital bond order from bonding and antibonding electrons.

Open

Hydrogen Ion Concentration Calculator

Convert pH to hydrogen- and hydroxide-ion concentrations.

Open

Ionic Strength Calculator

Calculate ideal single-ion ionic strength from concentration and charge.

Open

Isoelectric Point Calculator

Estimate pI as the mean of two explicit bracketing pKa values.

Open

Langmuir Isotherm Calculator

Calculate equilibrium loading with the Langmuir adsorption equation.

Open

Mass Concentration to Molar Concentration Calculator

Convert mass concentration to molarity with an explicit molar mass.

Open

Mass Percent Calculator

Calculate solute mass percentage from solute and total masses.

Open

Michaelis-Menten Equation Calculator

Calculate enzyme initial rate from Vmax, Km, and substrate concentration.

Open

Miller Indices Calculator

Calculate reciprocal Miller-index components from normalized intercepts.

Open

Molality Calculator

Calculate molality from solute moles and solvent mass.

Open

Molar Mass of Gas Calculator

Calculate gas molar mass from ideal-gas measurements and sample mass.

Open

Molar Ratio Calculator

Calculate a two-component molar ratio and normalized fractions.

Open

Mole Calculator

Calculate moles from sample mass and molar mass.

Open

Mole Fraction Calculator

Calculate component mole fractions for a two-component mixture.

Open

Moles to Atoms Calculator

Convert moles to particle count using Avogadro's constant.

Open

Nernst Equation Calculator

Calculate cell potential from standard potential, reaction quotient, electron count, and temperature.

Open

Neutralization Calculator

Calculate acid moles and monoprotic base volume at equivalence.

Open

Normality Calculator

Calculate normality from molarity and an equivalents-per-mole factor.

Open

Osmotic Pressure Calculator

Calculate ideal dilute-solution osmotic pressure with the van't Hoff equation.

Open

Partial Pressure Calculator

Calculate component partial pressure using Dalton's law.

Open

Percent Composition Calculator

Calculate component mass percentage from component and total mass.

Open

Percent Ionic Character Calculator

Estimate ionic character with the Pauling electronegativity-difference relation.

Open

Percent Yield Calculator

Calculate reaction percent yield from actual and theoretical yields.

Open

Buffer pH Calculator

Calculate buffer pH from pKa and conjugate base and acid amounts.

Open

Carbon Dating Calculator

Estimate radiocarbon age from remaining fraction and an explicit isotope half-life.

Open

Concentration Calculator

Calculate mass concentration from solute mass and solution volume.

Open

Degree of Unsaturation Calculator

Calculate DBE (double-bond equivalents) from a molecular formula atom count.

Open

Detention Time Calculator

Calculate hydraulic detention (residence) time as volume divided by flow.

Open

Diffusion Coefficient Calculator

Calculate a spherical particle's diffusion coefficient using Stokes-Einstein in SI units.

Open

Dilution Factor Calculator

Calculate dilution factor from aliquot and final solution volumes.

Open

Electrolysis Calculator

Calculate deposited mass and moles using Faraday's law.

Open

Electromotive Force Calculator

Calculate standard cell EMF from cathode and anode reduction potentials.

Open

Freezing Point Depression Calculator

Calculate freezing-point depression with the van't Hoff factor, cryoscopic constant, and molality.

Open

Gibbs Energy Calculator

Calculate Gibbs free-energy change from enthalpy, temperature, and entropy.

Open

Graham's Law Calculator

Calculate relative effusion rate from two molar masses.

Open

Grams to Moles Calculator

Convert a sample mass to amount of substance using molar mass.

Open

Half-Life Calculator

Calculate half-life and elapsed age from a decay constant and remaining fraction.

Open

pKa Calculator

Calculate pKa from an acid dissociation constant Ka.

Open

PPM to Molarity Calculator

Convert dilute aqueous ppm (mg/L) to molarity using molecular mass.

Open

Q10 Calculator

Calculate a temperature coefficient from two rates and temperatures.

Open

Radioactive Decay Calculator

Calculate remaining and decayed amount from half-life and elapsed time.

Open

Rate Constant Calculator

Calculate a first-order rate constant from initial and remaining amounts.

Open

Reconstitution Calculator

Calculate final volume from solute mass and target concentration.

Open

Resuspension Calculator

Calculate resuspension volume from pellet mass and target concentration.

Open

Saponification Value Calculator

Calculate saponification value from potassium hydroxide consumed and sample mass.

Open

Serial Dilution Calculator

Calculate overall dilution factor from explicit sequential factors.

Open

Solution Dilution Calculator

Calculate final and solvent volumes with C1V1 = C2V2.

Open

Theoretical Yield Calculator

Calculate product mass from one limiting reactant and explicit stoichiometric coefficients.

Open

Titration Calculator

Calculate monoprotic equivalence volume with C1V1 = C2V2.

Open

Water Hardness Calculator

Calculate calcium-carbonate-equivalent hardness from calcium and magnesium concentrations.

Open

Young–Laplace Equation Calculator

Calculate spherical-interface pressure difference from surface tension and radius.

Open

Dilution Calculator

Calculate stock volume and solvent volume with C1V1 = C2V2.

Open

Molarity Calculator

Calculate molarity, moles, or mass using an explicit litre and molar-mass basis.

Open

pH Calculator

Calculate pH and pOH for an ideal strong monoprotic acid or base at 25 °C.

Open

Activity Coefficient Calculator

Calculate an ideal-dilute Debye–Hückel activity coefficient from explicit ionic strength, charge, and A.

Open

Buffer Capacity Calculator

Calculate monoprotic buffer capacity from total concentration, pKa, and pH.

Open

Cubic Unit Cell Calculator

Calculate crystal density from molar mass, cubic edge length, and formula units per cell.

Open

Percent Solution Calculator

Calculate percent concentration with an explicit mass/mass, mass/volume, or volume/volume basis.

Open

Percentage Concentration to Molarity Calculator

Convert an explicitly selected percentage basis to molarity using molar mass and required density.

Open

Raoult's Law Calculator

Calculate ideal binary-solution partial and total vapor pressure.

Open

Standard Temperature and Pressure Calculator

Compare declared IUPAC 100 kPa and legacy 1 atm STP conventions.

Open

Vapor Pressure of Water Calculator

Calculate water or ice saturation pressure with declared temperature limits.

Open

Total Dissolved Solids Calculator

Calculate TDS from conductivity and a user-supplied calibration factor.

Open

Vapor Pressure Calculator

Calculate vapor pressure with explicit Antoine coefficients and unit scale.

Open

Reaction Quotient Calculator

Calculate a reaction quotient from explicit activities and stoichiometric coefficients.

Open

Entropy Change Calculator

Calculate ΔS = qrev/T from reversible heat and absolute temperature.

Open

Calibration Curve Calculator

Fit a three-point linear calibration curve and estimate an unknown.

Open

Boiling Point Calculator

Calculate boiling point using an explicit model and coefficients.

Open

Effective Nuclear Charge Calculator

Calculate effective nuclear charge from explicit atomic number and shielding.

Open

Equilibrium Constant Calculator

Calculate an equilibrium constant from explicit concentrations and stoichiometry.

Open

Heat of Combustion Calculator

Calculate heat released from explicit mass and specific energy.

Open

Mixing Ratio Calculator

Calculate a mixture ratio from explicit component quantities.

Open

Gibbs Phase Rule Calculator

Calculate degrees of freedom from components and phases.

Open

Kp Equilibrium Constant Calculator

Calculate Kp from explicit partial pressures and stoichiometry.

Open

Crude Protein Calculator

Calculate crude protein from nitrogen and an explicit conversion factor.

Open

Empirical Formula Calculator

Calculate normalized C/H/N/O/X mole ratios from entered elemental masses and atomic masses.

Open

Electronegativity Difference Calculator

Calculate the signed and absolute difference between two entered electronegativity values on a named scale.

Open

Enzyme Activity Calculator

Calculate direct assay activity from measured micromoles, time, and sample volume.

Open

Lattice Energy Calculator

Calculate Born–Landé lattice energy from explicitly entered charges, separation, and crystal-model constants.

Open

Chemical Oxygen Demand Calculator

Calculate COD from blank and sample titrant volumes with an explicitly entered equivalent conversion factor.

Open

Liquid Ethylene Density Calculator

Estimate liquid density with the Rackett equation using entered critical properties and fluid coefficients.

Open

Boiling Point at Altitude Calculator

Calculate altitude-adjusted pressure and boiling temperature from explicit atmospheric and Antoine-equation parameters.

Open

Atomic Mass to Moles Converter

Converts a given mass of a substance to moles using its atomic or molar mass.

Open

Molarity to Dilution Calculator

Calculates the volume of stock solution needed to prepare a diluted solution of desired molarity and volume.

Open

Percent Yield Calculator

Calculates the percent yield of a chemical reaction from actual and theoretical yields.

Open

Freezing Point Depression Calculator

Calculates the freezing point depression of a solution based on the solvent's cryoscopic constant, the van't Hoff factor, and molality.

Open

Boiling Point Elevation Calculator

Calculates the boiling point elevation of a solution based on the molality of the solute and the solvent's ebullioscopic constant.

Open