Entropy Calculator
Free calculate entropy changes using boltzmann equation, statistical mechanics, and thermodynamic entropy.
Enter Entropy Data
Number of possible arrangements
Heat added to system (optional)
J/K
Default: 1.381 × 10⁻²³ J/K
Results
Enter entropy data to calculate results
Entropy Formulas
Statistical Entropy
S = k × ln(Ω)
- • S = Entropy (J/K)
- • k = Boltzmann constant
- • Ω = Number of microstates
- • Higher Ω = higher entropy
- • Measures disorder/randomness
Thermodynamic Entropy
ΔS = q/T
- • ΔS = Entropy change (J/K)
- • q = Heat transfer (J)
- • T = Temperature (K)
- • Reversible process
- • Second law of thermodynamics