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Equilibrium Constant Calculator
Calculate $K_c$ or $K_p$ for the reaction $aA + bB \rightleftharpoons cC + dD$
Formula: $K = \frac{[C]^c \cdot [D]^d}{[A]^a \cdot [B]^b}$
Enter the equilibrium concentrations (M) or partial pressures (atm) and their corresponding stoichiometric coefficients from the balanced chemical equation. Leave unused species as 1.
Enter the equilibrium concentrations (M) or partial pressures (atm) and their corresponding stoichiometric coefficients from the balanced chemical equation. Leave unused species as 1.
Reactants (A & B)
Products (C & D)
Calculation Results
⚠️ Pure solids and pure liquids must be omitted from the equilibrium constant expression (effectively treated as having a value of 1). The equilibrium constant ($K$) is highly dependent on temperature.