Gibbs free energy calculator (ΔG = ΔH − TΔS)
Gibbs energy change from ΔH (kJ/mol), ΔS (J/mol·K), and temperature in kelvin.
Calculator
How to use
Gibbs energy
$$\Delta G = \Delta H - T\Delta S$$
Enter ΔH in kJ/mol and ΔS in J/(mol·K).
When to use
- Spontaneity and equilibrium direction at a fixed T.
Educational use only. Double-check values for labs, homework, and exams.