Enthalpy Calculator
Calculate specific enthalpy from internal energy, pressure, and specific volume.
How to Use This Calculator
1
Enter u, p, v
Use SI units for consistency.
2
Calculate h
Get specific enthalpy in J/kg.
Formula
h = u + p·v
Example: u=2e5 J/kg, p=1e5 Pa, v=0.001 m³/kg → h=2.001e5 J/kg
About Enthalpy
Enthalpy represents total heat content and is central to energy balances.
- Thermodynamic cycle analysis
- Steam tables and HVAC calculations
Frequently Asked Questions
Specific vs total enthalpy?
Specific is per unit mass (J/kg); total is mass × specific.
Can I input kPa and m³/kg?
Yes, but convert kPa to Pa (×1000) to stay consistent.