Clarity28 FREE TOOLS
Chemistry, made clearer.
Calculate molar mass, solution concentrations, reaction yields and chemical equilibria with explicit units and model assumptions.
Tools in this category
Molar Mass Calculator
Calculate molecular weight from a chemical formula, including parentheses and hydrates, with an element-by-element mass breakdown.
Molarity Calculator
Find solution concentration in mol/L from solute mass, molar mass and final solution volume.
Solution Dilution Calculator
Calculate the stock volume needed to prepare a target concentration and final volume using C1V1 = C2V2.
Serial Dilution Calculator
Plan repeated equal-ratio dilutions and see the concentration after every transfer.
Molality Calculator
Calculate moles of solute per kilogram of solvent from measured masses.
Mole Fraction Calculator
Calculate the mole fraction of a component in a two-component mixture.
Mass Percent Calculator
Calculate the mass percentage of a solute using solute mass and total solution mass.
Volume Percent Calculator
Find volume/volume concentration from component volume and measured final solution volume.
Moles to Particles Calculator
Convert an amount in moles to a count of molecules, atoms or other specified entities.
Stoichiometry Calculator
Convert a known reactant mass into a product mass using coefficients from a balanced chemical equation.
Limiting Reactant Calculator
Identify the limiting reactant from two available mole amounts and balanced reaction coefficients.
Percent Yield Calculator
Compare actual product yield with the theoretical maximum and flag results above 100%.
Ideal Gas Volume Calculator
Find gas volume from moles, Kelvin temperature and absolute pressure.
Combined Gas Law Calculator
Calculate a new gas volume when absolute pressure and Kelvin temperature change at fixed gas amount.
Partial Pressure Calculator
Calculate a component gas pressure from its mole amount and the total mixture pressure.
pH and pOH Calculator
Convert hydrogen-ion concentration to pH, pOH and hydroxide concentration using an explicit pKw.
Buffer pH Calculator
Estimate buffer pH from pKa and the concentrations of a weak acid and its conjugate base.
Weak Acid pH Calculator
Estimate pH and percent ionization for a single monoprotic weak acid using the quadratic equilibrium expression.
Titration Calculator
Find an unknown analyte concentration from titrant concentration, equivalence volume and balanced reaction coefficients.
Beer–Lambert Law Calculator
Find concentration from absorbance, molar absorptivity and optical path length.
Arrhenius Equation Calculator
Estimate a reaction rate constant at a second temperature using activation energy and a known rate constant.
First-Order Reaction Half-Life Calculator
Calculate half-life and remaining fraction from a first-order rate constant and elapsed time.
Boiling and Freezing Point Calculator
Estimate boiling-point elevation and freezing-point depression from molality and solvent constants.
Osmotic Pressure Calculator
Estimate ideal osmotic pressure from molarity, temperature and the van’t Hoff factor.
Gibbs Free Energy Calculator
Calculate ΔG from enthalpy, entropy and Kelvin temperature with consistent energy units.
Nernst Equation Calculator
Estimate cell potential from standard potential, reaction quotient, temperature and electrons transferred.
Van’t Hoff Equation Calculator
Estimate how an equilibrium constant changes between two temperatures for a stated reaction enthalpy.
Average Atomic Mass Calculator
Calculate a weighted atomic mass from isotope masses and measured percent abundances.
Choosing a tool for chemistry
Start with Molar Mass for a chemical formula, Molarity for a solution, or Solution Dilution for a target concentration. Reaction tools require balanced coefficients. These educational models are not laboratory safety procedures.