Equilibrium Calculator
Calculate the equilibrium constant Keq using the law of mass action.
Amortization schedule
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Growth over time
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Introduction
Equilibrium Calculator — Calculate the equilibrium constant Keq using the law of mass action. Enter Product concentrations (comma-separated), Product coefficients, Reactant concentrations, Reactant coefficients to get an instant, accurate result.
Formula
Law of mass action: Keq = [products]^(coefficients) / [reactants]^(coefficients), with each equilibrium concentration raised to its stoichiometric coefficient from the balanced equation.
Step-by-step
- Enter the Product concentrations (comma-separated).
- Enter the Product coefficients.
- Enter the Reactant concentrations.
- Enter the Reactant coefficients.
- Click Calculate to see your result instantly.
Real-world example
Example: With Product concentrations (comma-separated) = 2,1, Product coefficients = 1,1, Reactant concentrations = 0.5,1, Reactant coefficients = 1,1, the Equilibrium Calculator gives Keq: 4.
Frequently Asked Questions
What does the value of Keq tell you?
Why do stoichiometric coefficients become exponents?
What inputs does the Equilibrium Calculator need?
How accurate is the Equilibrium Calculator?
Is the Equilibrium Calculator free to use?
About the Equilibrium Calculator
The Equilibrium Calculator uses a real, verifiable formula — Law of mass action: Keq = [products]^(coefficients) / [reactants]^(coefficients), with each equilibrium concentration raised to its stoichiometric coefficient from the balanced equation. — so results are accurate every time, not an approximation.