Saturated Steam Table by Temperature

Conditions and notes

Saturation pressure is absolute. Equilibrium state of saturated liquid and saturated vapour. Method IAPWS IF97, reference state saturated liquid at the triple point.

• The pressure column is absolute pressure. The difference between gauge and absolute pressure is about 1.013 bar, and subtracting it from the value in the table gives the gauge pressure.
• Values are computed from the IAPWS IF97 equations. Compared with the IAPWS 95 equation developed for scientific use, in the rows checked below 350 °C the difference is under 0.03 percent in specific volume and under 0.3 kJ/kg in enthalpy. At 370 °C it reaches 0.3 percent and 2 kJ/kg, and at 373 °C 0.7 percent and 4.5 kJ/kg.
• Specific volume covers a very wide range, so v_g is written with five significant digits.
• The first row is the triple point (0.01 °C). The last row is the critical point (373.946 °C). There the f and g values are equal and h_fg is zero.

The table gives, for each temperature, the state in which saturated liquid and saturated vapour coexist. Each row also lists the saturation pressure, which is the absolute pressure at which water boils at that temperature. The subscript f means saturated liquid, g means saturated vapour and fg means the difference between them. For example h_fg is the enthalpy of vaporisation and equals h_g minus h_f. The pressure column is absolute pressure. Some handbooks and vendor charts are arranged by gauge pressure, so their pressure columns cannot be compared directly with the column of this table: absolute pressure is found by adding about 1.013 bar to the gauge pressure. The enthalpy and entropy reference is the same as in IAPWS IF97: the internal energy and entropy of saturated liquid at the triple point (0.01 °C) are taken as zero, so its enthalpy comes out near 0.0006 kJ/kg and shows as 0.00 in the table. Many textbooks use the same reference. Specific volume, enthalpy and entropy are per unit mass. The last row is the critical point: there liquid and vapour cannot be told apart and the fg differences are zero.

Sources

This table is for preliminary reference. Check the applicable standard and product conditions before use.

• Source 1. R7/97(2012). Accessed: 2026-10-16
• Source 2. NISTIR 5078:1998. Accessed: 2026-10-16

Data version: 2026-10-16

Related calculators

• Steam Table, Enthalpy and Steam Energy Calculator
• Boiler Size Calculator (Preliminary)
• Heat Exchanger Area Calculator (Preliminary)

Other tables

• Saturated Steam Table by Pressure