Steam Table Calculator (IAPWS-IF97)

ASME / IAPWS-IF97 Standard

Select your known input pair (Temperature, Pressure, Quality, Enthalpy, or Entropy) to compute the exact thermodynamic state of water and trace the point on the Temperature-Entropy ($T$-$s$) diagram.

Subcooled Liquid

Saturated Dome

Superheated Vapor

Supercritical Fluid

📝 Configuration

Input Pair Selection

T & P T & x P & x P & h P & s

Inputs

Temperature ($T$) [°C]: Valid range: 0.01 to 1000 °C

Pressure ($P$) [kPa]: Valid range: 0.611 to 100,000 kPa

Quality (vapor fraction, $x$) [0 to 1]: 0 = Sat Liquid, 1 = Sat Vapor

Specific Enthalpy ($h$) [kJ/kg]: Valid range: 0 to 5000 kJ/kg

Specific Entropy ($s$) [kJ/(kg·K)]: Valid range: 0 to 15 kJ/(kg·K)

ASME IAPWS-IF97 Standard:
Equations are structured in 5 regions. Viscosity ($\mu$) and Thermal Conductivity ($k$) are solved via the latest IAPWS formulations.

Saturated Mix Formulae:
$$v = v_f + x(v_g - v_f)$$ $$h = h_f + x \cdot h_{fg}$$ $$s = s_f + x \cdot s_{fg}$$

📊 Results & Visualization

Configure input properties and click Calculate.

📘 Standard IAPWS-IF97 Formulation

Physical Range of Validity

The industrial standard IAPWS-IF97 covers thermodynamic water/steam states in the following ranges:

Temperature: $0^\circ\text{C}$ to $800^\circ\text{C}$ (Region 5 extends up to $2000^\circ\text{C}$ but with specific bounds).
Pressure: $0.611\text{ kPa}$ up to $100\text{ MPa}$ ($1000\text{ bar}$).

Calculations automatically transition equations of state depending on the region of the input parameters to maintain thermodynamic consistency.

Saturation Curve Calculations

Saturation temperatures and pressures are calculated using backward/auxiliary equations boundary fits. Transport properties like viscosity ($\mu$) and conductivity ($k$) are based on the latest IAPWS formulations including critical enhancement checks.

💧 Steam Table Calculator (IAPWS-IF97)