Engineering calculator reviewed for preliminary design use · Last updated: March 2026
Calculate saturated steam thermodynamic properties from temperature or pressure input. Outputs include saturation temperature, pressure, liquid and vapor density, latent heat, and specific enthalpy. Apply to steam piping, heat exchanger, and distillation design.
Saturated Steam Properties
Steam is used extensively in process plants for heating, distillation, and power generation. Accurate knowledge of steam properties at operating conditions is fundamental for heat exchanger, evaporator, and steam trap design.
Properties Calculated
Saturation Pressure Psat: Antoine equation approximation [kPa]
Liquid Specific Enthalpy hf: [kJ/kg]
Vapor Specific Enthalpy hg: [kJ/kg]
Latent Heat of Vaporization hfg: hg − hf [kJ/kg]
Saturated Vapor Specific Volume vg: [m³/kg]
Applications
Steam tracing and heat tracing design
Evaporator and condenser thermal calculations
Steam ejector and jet pump sizing
Boiler feedwater flow calculations
Valid range: 0–374°C (up to critical point). Not applicable above the critical temperature of 374.1°C and critical pressure of 22.1 MPa.
What is the difference between saturated and superheated steam?
Saturated steam is at its boiling point for the given pressure — any heat removal causes condensation. Superheated steam is above the saturation temperature and behaves more like a gas. This calculator provides saturated properties only.
How accurate are the approximation formulas?
The correlations used are polynomial fits to IAPWS-IF97 steam tables. Accuracy is typically within 0.5-2% over the valid temperature/pressure range. For custody-grade calculations, use the full IAPWS tables.
These results are preliminary estimates for screening-level design use. They do not replace detailed engineering, code compliance verification, or vendor-certified calculations.