Calculators

Calculates the pH, pKa, or the ratio of acid and conjugate base concentrations using the Henderson-Hasselbalch equation. This equation is commonly used in chemistry, biology, and medicine to estimate the pH of a buffer solution.

This calculator helps you convert between different concentration units, including molarity (mol/L) and percentage concentration (% w/v, % v/v, % w/w).

Calculates the molality of a solution given the moles of solute and the mass of the solvent.

Calculates the vapor pressure of an ideal solution using Raoult's Law. It can also determine the vapor pressure and mole fraction of a pure solvent in a solution.

Calculates the amount of bleach and water needed to achieve a desired chlorine concentration for disinfection purposes.

Calculates the activity coefficient of an ion in a solution using the Debye-Hückel equation or its extended versions.

Calculates the rate constant of a chemical reaction using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and pre-exponential factor.

Calculates the actual yield of a chemical reaction, given the theoretical yield and percent yield.

Calculates the dilution factor, final volume, initial volume, or final concentration based on the given inputs. Dilution is the process of reducing the concentration of a solute in a solution, usually simply by mixing with more solvent.

Calculates the number of moles in a given mass of a substance using its molecular weight.