Gibbs Energy Calculator
Calculate gibbs energy with explicit inputs and a worked example.
Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure. All thermodynamic inputs must apply at the stated temperature.
Example Calculation
- Enthalpy change: 10 kJ/mol
- Entropy change: 20 J/(mol·K)
- Temperature: 300 K
ΔH=10 kJ/mol, ΔS=20 J/(mol·K), T=300 K gives ΔG=4 kJ/mol.
Frequently asked questions
How do I use this calculator?
Enter enthalpy change, entropy change, temperature. The result updates automatically. Use Reset to restore the example values.
What method does it use?
ΔG = ΔH − TΔS/1000. Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure. All thermodynamic inputs must apply at the stated temperature.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.