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Chemistry Calculators

Chemical yield, concentration and chemistry calculations.

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Molarity Calculator

Molarity Calculator — free online calculator.

Molar Mass Calculator

Molar Mass Calculator — free online calculator.

Mass Percent Calculator

Mass Percent Calculator — free online calculator.

Actual Yield Calculator

Actual Yield Calculator The Actual Yield Calculator finds the real mass of product you obtained from a reaction by combining the theoretical yield with the percent yield. Actual yield = theoretical yield × (percent yield ÷ 100). It also shows the shortfal — free online calculator.

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101 calculators

Chemistry & Yield

4 calculators

Actual Yield Calculator

Actual Yield Calculator The Actual Yield Calculator finds the real mass of product you obtained from a reaction by combining the theoretical yield with the percent yield. Actual yield = theoretical yield × (percent yield ÷ 100). It also shows the shortfal — free online calculator.

More Chemistry Calculators

97 calculators

Activation Energy Calculator

Activation Energy Calculator The activation energy is the minimum energy a reaction needs to proceed. This calculator uses the two-temperature form of the Arrhenius equation: give it the rate constants at two temperatures and it solves for the activation — free online calculator.

Activity Coefficient Calculator

Activity Coefficient Calculator The Activity Coefficient Calculator estimates the activity coefficient (γ) of an ion in solution using the Debye-Hückel limiting-law form. It corrects for how electrostatic interactions in an electrolyte make an ion's effec — free online calculator.

Air-Fuel Ratio Calculator

Air-Fuel Ratio Calculator The Air-Fuel Ratio Calculator finds the AFR — the mass of air divided by the mass of fuel in a combustion mixture — plus the equivalence ratio (lambda) relative to the stoichiometric AFR. Lambda below 1 is a rich mixture, above 1 — free online calculator.

Alligation Medial Calculator

Alligation Medial Calculator The Alligation Medial Calculator finds the average concentration of a mixture made by combining solutions of different strengths. It is the volume-weighted mean: (c₁v₁ + c₂v₂ + c₃v₃) ÷ (v₁ + v₂ + v₃). — free online calculator.

Arrhenius Equation Calculator

Arrhenius Equation Calculator Calculate the rate constant k of a chemical reaction with the Arrhenius equation, k = A · exp(−Eₐ ⁄ (R·T)). Enter the pre-exponential factor A, the activation energy Eₐ in kJ/mol, and the absolute temperature T in kelvin. The — free online calculator.

Atom Economy Calculator

Atom Economy Calculator Calculate the atom economy of a reaction — the percentage of reactant mass that ends up in the desired product. Divide the molar mass of the target product by the total molar mass of all reactants and multiply by 100. A high atom e — free online calculator.

Atom Particle Calculator

Atom Particle Calculator Work out the number of protons, neutrons and electrons in an atom or ion from its atomic number (Z), mass number (A) and charge. Protons equal Z, neutrons equal A − Z, and electrons equal Z minus the net charge. Enter the numbers — free online calculator.

Atomic Mass Calculator

Atomic Mass Calculator Calculate the average atomic mass of an element from the masses and natural abundances of two isotopes. The calculator takes the abundance-weighted mean: (m₁·a₁ + m₂·a₂) ÷ (a₁ + a₂). Enter each isotope's mass in atomic mass units (u — free online calculator.

Average Atomic Mass Calculator

Average Atomic Mass Calculator The Average Atomic Mass Calculator finds the weighted average mass of an element from the masses and natural abundances of its isotopes. Enter each isotope's mass (in atomic mass units) and its percent abundance, and you get — free online calculator.

Avogadro's Number Calculator

Avogadro's Number Calculator The Avogadro's Number Calculator converts between moles, number of particles, and mass using Avogadro's constant (6.022 × 10²³ particles per mole). Pick a mode, enter your value, and it returns the matching quantity — moles fr — free online calculator.

Beer-Lambert Law Calculator

Beer-Lambert Law Calculator Apply the Beer-Lambert law to relate the absorbance of a solution to its concentration. Absorbance A = ε·b·c, where ε is the molar extinction coefficient, b the path length and c the concentration. Choose what to solve for — ab — free online calculator.

Bleach Dilution Calculator

Estimate initial solution volume from C1V1 = C2V2, with explicit dilution assumptions and bleach handling precautions.

Boiling Point at Altitude Calculator

Boiling Point at Altitude Calculator Find the boiling point of water at altitude or a given atmospheric pressure. Enter your altitude (or pressure) to see how much lower water boils as you climb — useful for cooking and brewing at elevation. — free online calculator.

Boiling Point Elevation Calculator

Boiling Point Elevation Calculator Calculate boiling point elevation — how much a dissolved solute raises a solvent's boiling point. Enter the solvent's boiling point, the ebullioscopic constant, molality, and van't Hoff factor to get the elevation and th — free online calculator.

Bond Order Calculator

Bond Order Calculator Calculate the bond order of a molecule from molecular orbital theory. Enter the number of bonding and antibonding electrons to get the bond order and a quick read on bond stability. — free online calculator.

Buffer Capacity Calculator

Buffer Capacity Calculator Estimate the buffer capacity of a solution — how well it resists pH change — from the amount of strong acid or base added, the buffer volume, and the resulting pH shift. Enter your values to get the buffer capacity in mol/L per — free online calculator.

Buffer pH Calculator

Buffer pH Calculator (from [H+]) Find the pH of a solution from its hydrogen ion concentration. Enter the [H+] in moles per litre and the calculator returns pH using pH = −log₁₀[H+]. — free online calculator.

Calibration Curve Calculator

Calibration Curve Calculator Use a linear calibration curve (y = mx + b) to convert an instrument signal into an unknown concentration. Enter the slope and intercept from your standards, plus the measured signal, and you get the concentration back instant — free online calculator.

Carbon-14 Dating Calculator

Carbon-14 Dating Calculator Estimate the age of an organic sample from its remaining carbon-14, or find how much C-14 is left after a given time. Carbon-14 decays with a half-life of 5,730 years, so the ratio of current to original activity reveals the sa — free online calculator.

Chemical Name Calculator

Chemical Name Calculator Look up the molecular weight of a simple compound by entering the number of atoms of each element. — free online calculator.

Diffusion Coefficient Calculator

Diffusion Coefficient Calculator Estimate the diffusion coefficient of a spherical molecule in solution using the Stokes-Einstein equation. — free online calculator.

Double Bond Equivalent Calculator

Double Bond Equivalent Calculator Calculate the Degree of Unsaturation (Double Bond Equivalent, DBE) for an organic molecule from its molecular formula. — free online calculator.

Effective Charge Calculator

Effective Charge Calculator Calculate the effective nuclear charge (Z*) experienced by an electron using Slater's rules. — free online calculator.

Enzyme Activity Calculator

Enzyme Activity Calculator Calculate enzyme activity (units/mL) and specific activity (units/mg protein) from an assay. — free online calculator.

Grahams Law Of Diffusion Calculator

Grahams Law Of Diffusion Calculator Calculate the relative rates of diffusion or effusion of two gases using Graham's Law. — free online calculator.

Half Life Chemistry Calculator

Half Life Chemistry Calculator Calculate the remaining amount of a radioactive substance or the number of half-lives elapsed from initial quantity and half-life. — free online calculator.

Henderson Hasselbalch Calculator

Henderson Hasselbalch Calculator Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation. — free online calculator.

Hydrogen Ion Concentration Calculator

Hydrogen Ion Concentration Calculator The Hydrogen Ion Concentration Calculator converts a pH value into the molar concentration of hydrogen ions [H+], and also shows the hydroxide concentration [OH-]. — free online calculator.

Ionic Strength Calculator

Ionic Strength Calculator Calculate the ionic strength of a solution from the concentrations and charges of dissolved ions. — free online calculator.

Isoelectric Point Calculator

Isoelectric Point Calculator Estimate the isoelectric point (pI) of a peptide or protein from the pKa values of its ionizable groups. — free online calculator.

Kp Calculator

Kp Calculator Convert between Kp (equilibrium constant in terms of partial pressures) and Kc (equilibrium constant in terms of concentrations). — free online calculator.

Langmuir Isotherm Calculator

Langmuir Isotherm Calculator Calculate the amount adsorbed on a surface at a given concentration using the Langmuir adsorption isotherm. — free online calculator.

Michaelis Menten Equation Calculator

Michaelis Menten Equation Calculator Calculate the initial reaction velocity of an enzyme-catalyzed reaction using the Michaelis-Menten equation. — free online calculator.

Miller Indices Calculator

Miller Indices Calculator Calculate the d-spacing (interplanar spacing) for a crystalline plane from Miller indices and lattice parameters. — free online calculator.

Molar Ratio Calculator

Molar Ratio Calculator The Molar Ratio Calculator simplifies the ratio between the moles of two substances in a reaction. Enter the moles of each to get the mole ratio in lowest terms. — free online calculator.

Neutralization Calculator

Neutralization Calculator Calculate the volume or concentration of acid or base needed to neutralize a solution using the neutralization formula. — free online calculator.

Normality Calculator

Normality Calculator Calculate the normality of a solution from molarity and equivalence factor, or from solute mass, volume, and equivalent weight. — free online calculator.

Pka Calculator

Pka Calculator Calculate pKa from Ka (acid dissociation constant) or Ka from pKa, and estimate percent dissociation at a given pH. — free online calculator.

PPM to Molarity Calculator

PPM to Molarity Calculator Calculate molarity of a chemical solution from moles of solute and volume. Molarity (M) = moles of solute ÷ liters of solution. Uses standard SI and chemistry units (mol, L, M). — free online calculator.

Protein Solubility Calculator

Protein Solubility Calculator Calculate protein solubility in solution. Converts between concentration units: g/L, mg/mL, molarity (M). Affected by pH, temperature, salt concentration, and protein type. — free online calculator.

Q10 Calculator

Q10 Calculator Calculate the Q10 temperature coefficient — the factor by which a reaction rate changes with a 10°C temperature increase. — free online calculator.

Radioactive Decay Calculator

Radioactive Decay Calculator Calculate the remaining activity, number of nuclei, or mass of a radioactive sample after a given time. — free online calculator.

Raoults Law Calculator

Raoults Law Calculator Calculate the vapor pressure of a solution using Raoult's Law, and the boiling point elevation. — free online calculator.

Rate Constant Calculator

Rate Constant Calculator Calculate reaction rate constant (k) from rate law. For 1st order: k = rate/[A]. For 2nd order: k = rate/([A]²). For bimolecular: k = rate/([A][B]). — free online calculator.

Reaction Quotient Calculator

Reaction Quotient Calculator Calculate the reaction quotient Q for a reaction and predict which direction the reaction will proceed. — free online calculator.

Reconstitution Calculator

Reconstitution Calculator Calculate the volume of diluent needed to reconstitute a lyophilized (freeze-dried) drug or powder to a desired concentration. — free online calculator.

Saponification Value Calculator

Saponification Value Calculator Calculate the saponification value (SAP value) of an oil — the amount of KOH needed to saponify one gram of oil — for soap making. — free online calculator.

Tds Calculator

Tds Calculator Calculate Total Dissolved Solids (TDS) from conductivity measurement or estimate water quality category. — free online calculator.

Titration Calculator

Titration Calculator The Titration Calculator finds the unknown concentration of an analyte from a titration using C1V1 = C2V2. Enter the titrant concentration and volume and the analyte volume. — free online calculator.

Young Laplace Equation Calculator

Young Laplace Equation Calculator Calculate the pressure difference across a curved fluid interface (droplet, bubble) using the Young-Laplace equation. — free online calculator.