Hydrogen Density and Pressure Calculator

This free tool offers two calculators:

Useful for hydrogen storage design, fueling analysis, and thermodynamic simulations.

Hydrogen Density Calculator

Storage Pressure Calculator

Hydrogen Density Calculator – Powered by CoolProp


This tool allows you to calculate the density of hydrogen under specific pressure and temperature conditions, using the thermophysical library CoolProp for accurate real-gas behavior.

Understanding the density of hydrogen is essential for:

  • Designing pressurized storage systems.

  • Performing thermodynamic calculations.

  • Validating simulation results in hydrogen-based applications.

Just enter the pressure and temperature of the hydrogen, and the tool will return its density in kg/m³ — accurate even at high pressures and low temperatures, thanks to the real-gas equations used.

👉 Try it now and get precise results based on real thermodynamic models!

Hydrogen Pressure Calculator – Estimate Pressure from Mass, Volume, and Temperature


If you know the mass of hydrogen stored in a tank, along with its volume and temperature, this calculator allows you to estimate the internal pressure of the tank.

This is particularly useful for:

  • Performing mass balance calculations.

  • Estimating pressure after hydrogen loss or consumption over time.

  • Assessing storage performance in real-world applications.

Example use case: You know your storage vessel has lost 0.5 kg of hydrogen over a certain period. Enter the current mass, volume, and temperature, and the calculator will estimate the new pressure inside the tank.

This calculator uses real-gas thermodynamics (via CoolProp) to ensure accuracy in high-pressure applications.

🔍 Use it to validate experimental data or to model dynamic behaviors in hydrogen storage systems.

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