Hydrogen Density Calculator

Calculate hydrogen density using the Lemmon equation of state

Note:

The calculations provided by HyCalc are intended for preliminary estimates and scenario exploration. While we strive for accuracy, we recommend consulting qualified engineers for final system design, safety decisions, and regulatory compliance in your specific application.

How to Use This Calculator

Key Parameters Explained

Pressure Input


  • Range: 0.001-70 MPa (0.01-700 bar)
  • Units: Choose between bar, psi, or kPa
  • Typical Values: 1-700 bar for most applications

Temperature Input


  • Range: 33-1000 K (-240°C to 727°C)
  • Units: Choose between °C, °F, or K
  • Common Range: -40°C to 85°C for most applications

Example Calculation

Standard Storage Conditions

Pressure: 350 bar
Temperature: 25°C
Result: ≈ 23.3 kg/m³