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