Explore over 100 fluids and calculate key thermodynamic properties such as density, enthalpy, entropy, pressure, temperature, and more. Just select a fluid, choose the desired output property, and enter any valid combination of two input variables — the tool does the rest.
Backed by the CoolProp library, this calculator ensures high accuracy based on real gas equations of state.
Explore the Thermodynamic State of More Than 100 Fluids
This calculator allows you to compute key thermodynamic properties—such as density, enthalpy, entropy, internal energy, or specific heats—for over 100 different fluids using the CoolProp open-source thermophysical property library.
Whether you're analyzing hydrogen, water, air, or refrigerants, this tool enables accurate modeling of thermodynamic states based on various input pairs (e.g., pressure + temperature, pressure + enthalpy, etc.).
→ ✅ Use the form to simulate and analyze real-gas behavior in engineering systems such as heat exchangers, storage tanks, compression stages, or expansion devices.
Work Smarter with Property Pairs You Choose
Unlike tables or software with fixed input/output combinations, this calculator gives you flexibility: choose the input pair that matches your system's known conditions and instantly get the desired output property.
→ ✅ Ideal for engineering students, hydrogen professionals, and thermal system designers who want fast, accurate, and customizable thermodynamic results.
📘 Do you want to better understand how CoolProp works and why this tool is so accurate? Read our article: CoolProp in Python: thermodynamic properties for engineering.