Equilibrium Constant Calculator

What is this calculator used for?

This calculator helps you determine the equilibrium constant (K) for a chemical reaction based on the concentrations of the products and reactants at equilibrium. It is useful for understanding how far a reaction proceeds and the ratio of product to reactant concentrations at equilibrium.

How to use this calculator

Enter the equilibrium concentrations of products and reactants in their respective input fields. The calculator will automatically compute the equilibrium constant (K) using the formula below.

Formula

K = [Products] / [Reactants]

Example

Suppose at equilibrium, the concentration of products is 0.8 mol/L and that of reactants is 0.2 mol/L. Then:

K = 0.8 / 0.2 = 4