Chemistry
Laboratory and chemical calculation tools
Van der Waals Gas Calculator
Compare real-gas pressure with ideal-gas pressure using Van der Waals constants, moles, volume, and temperature.
Weak Acid Titration Point Calculator
Estimate pH, neutralization percentage, excess moles, and buffer ratio for a weak acid titrated with strong base.
Equilibrium ICE Table Calculator
Solve a simple one-to-one equilibrium shift from initial reactant, initial product, and equilibrium constant.
Arrhenius Activation Energy Calculator
Estimate activation energy and pre-exponential factor from two rate constants measured at two temperatures.
Precipitation Mixing Calculator
Estimate diluted ion concentrations, ion product, saturation ratio, and precipitation index when two solutions are mixed.
Debye-Huckel Activity Calculator
Estimate activity coefficient and effective activity from ionic strength, ion charge, ion size, and concentration.
Competitive Enzyme Inhibition Calculator
Estimate apparent Km, inhibited reaction rate, uninhibited rate, and rate reduction for competitive enzyme inhibition.
Chromatography Efficiency Calculator
Calculate theoretical plates, plate height, capacity factor, and selectivity timing from chromatographic peak measurements.
Isotopic Dilution Calculator
Estimate sample analyte mass from spike mass and isotope abundance measurements using isotope dilution logic.
Phosphate Buffer Mix Calculator
Estimate pH and buffer concentration after mixing acid and base phosphate stocks into a final volume.
Kp to Kc Equilibrium Calculator
Kp to Kc Equilibrium Calculator evaluates equilibrium tendency with concentration ratios, stoichiometry, and Gibbs energy.
Reaction Quotient Calculator
Reaction Quotient Calculator evaluates equilibrium tendency with concentration ratios, stoichiometry, and Gibbs energy.
Equilibrium Gibbs Energy Calculator
Equilibrium Gibbs Energy Calculator evaluates equilibrium tendency with concentration ratios, stoichiometry, and Gibbs energy.
Solubility Shift Calculator
Solubility Shift Calculator evaluates equilibrium tendency with concentration ratios, stoichiometry, and Gibbs energy.
Weak Acid pH Calculator
Weak Acid pH Calculator estimates pH, pOH, buffer ratio, and neutralization after dilution.
Weak Base pH Calculator
Weak Base pH Calculator estimates pH, pOH, buffer ratio, and neutralization after dilution.
Buffer Capacity Calculator
Buffer Capacity Calculator estimates pH, pOH, buffer ratio, and neutralization after dilution.
Alkalinity Calculator
Alkalinity Calculator estimates pH, pOH, buffer ratio, and neutralization after dilution.
Rate Law Calculator
Rate Law Calculator models concentration change, half-life, rate, and Arrhenius temperature effect.
Enzyme Kinetics Calculator
Enzyme Kinetics Calculator models concentration change, half-life, rate, and Arrhenius temperature effect.
Michaelis-Menten Calculator
Michaelis-Menten Calculator models concentration change, half-life, rate, and Arrhenius temperature effect.
Radioactive Dating Calculator
Radioactive Dating Calculator models concentration change, half-life, rate, and Arrhenius temperature effect.
Redox Cell Potential Calculator
Redox Cell Potential Calculator combines Faraday's law, charge, deposited mass, and Nernst potential.
Faraday Electrolysis Calculator
Faraday Electrolysis Calculator combines Faraday's law, charge, deposited mass, and Nernst potential.
Isotope Dilution Calculator
Isotope Dilution Calculator combines Faraday's law, charge, deposited mass, and Nernst potential.
Electroplating Thickness Calculator
Electroplating Thickness Calculator combines Faraday's law, charge, deposited mass, and Nernst potential.
Raoult's Law Calculator
Raoult's Law Calculator converts mass and volume inputs into molarity, molality, mass percent, and osmotic pressure.
Colligative Properties Calculator
Colligative Properties Calculator converts mass and volume inputs into molarity, molality, mass percent, and osmotic pressure.
UV-Vis Concentration Calculator
UV-Vis Concentration Calculator converts mass and volume inputs into molarity, molality, mass percent, and osmotic pressure.
Chromatography Resolution Calculator
Chromatography Resolution Calculator converts mass and volume inputs into molarity, molality, mass percent, and osmotic pressure.
Henderson-Hasselbalch Calculator
Calculate buffer pH from pKa and conjugate-base to acid concentration ratio.
Gibbs Free Energy Calculator
Calculate ΔG from enthalpy, entropy, and temperature and classify spontaneity numerically.
Reaction Rate Calculator
Estimate average reaction rate from concentration change, elapsed time, and stoichiometric coefficient.
First-Order Half-Life Calculator
Calculate remaining amount and half-life for a first-order process.
Henry's Law Calculator
Estimate gas solubility in a liquid from Henry's constant and partial pressure.
Clausius-Clapeyron Calculator
Estimate vapor pressure at a new temperature using enthalpy of vaporization.
Ionic Strength Calculator
Estimate ionic strength for two ionic species from concentration and charge.
Solubility Product Calculator
Estimate Ksp from molar solubility and dissociation stoichiometry.
Electrolysis Calculator
Calculate deposited product mass from current, time, electron count, and molar mass.
Calorimetry Mixture Calculator
Estimate heat transfer and molar enthalpy from water mass, heat capacity, temperature change, and sample moles.
Serial Dilution Calculator
Calculate concentration after repeated equal dilution steps.
Normality Calculator
Calculate solution normality from equivalents and volume.
Mass Percent Calculator
Calculate mass percent from solute mass and total solution mass.
Mole Fraction Calculator
Calculate mole fraction from component moles and total moles.
Avogadro's Number Calculator
Convert between moles and particles using Avogadro's constant.
Gas Density Calculator
Estimate gas density from pressure, molar mass, and temperature.
Beer-Lambert Law Calculator
Calculate absorbance from molar absorptivity, path length, and concentration.
Nernst Equation Calculator
Estimate cell potential from standard potential, temperature, electrons, and reaction quotient.
Arrhenius Equation Calculator
Estimate a rate constant from pre-exponential factor, activation energy, and temperature.
Boiling Point Elevation Calculator
Calculate boiling point elevation from molality, ebullioscopic constant, and van't Hoff factor.
Freezing Point Depression Calculator
Calculate freezing point depression from molality, cryoscopic constant, and van't Hoff factor.
Osmolarity Calculator
Calculate osmolarity from molarity and the number of dissociated particles.
pH Dilution Calculator
Estimate new pH after diluting a strong acid solution.
Solution Mass Calculator
Calculate solute mass needed from molarity, volume, and molar mass.
Percent Error Calculator
Calculate percent error between measured and accepted values.
Limiting Reagent Calculator
Compare two reactants using moles and stoichiometric coefficients.
Theoretical Yield Calculator
Estimate theoretical product mass from limiting reagent and product molar mass.
Atom Economy Calculator
Calculate atom economy from desired product mass and total reactant mass.
Stoichiometry Mass Calculator
Convert reactant mass into expected product mass using coefficients and molar masses.
Molarity Calculator
Calculate solution molarity from moles of solute and solution volume.
Moles and Mass Calculator
Convert mass to moles, millimoles, and particles using molar mass.
Percent Yield Calculator
Calculate reaction percent yield and yield loss from actual and theoretical yield.
PPM Calculator
Convert solute mass and solution volume into ppm, ppb, and percent concentration.
Titration Calculator
Estimate analyte concentration from titrant volume, titrant molarity, and stoichiometry.
Molality Calculator
Calculate molality from moles of solute and kilograms of solvent.
Osmotic Pressure Calculator
Estimate osmotic pressure using molarity, temperature, and van 't Hoff factor.
Concentration Dilution Calculator (C1V1 = C2V2)
Calculate dilution values using the fundamental chemistry equation C1V1 = C2V2. Solve for any missing value given three inputs.
Ideal Gas Law Calculator (PV = nRT)
Calculate pressure, volume, moles, or temperature using the ideal gas law equation PV = nRT. Solve for any missing value given three inputs.
Molar Mass Calculator
Calculate the molar mass and elemental composition of any chemical compound.
pH and pOH Calculator
Convert between pH, pOH, [H+] and [OH−], including Kw and pKw at standard conditions.
Buffer pH Calculator (Henderson-Hasselbalch)
Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation. Determine the pH based on pKa and the concentrations of the acid and its conjugate base.
Brew Calculator
Comprehensive brewing calculator for beer, wine, and cider. Calculate ABV, attenuation, calories, and visualize fermentation progress.