Steam Tables

These steam charts quantify the properties of pure water across a large range of properties, as calculated according to the nist-iapws 1995 model [1].

The properties listed are mass-specific internal energy u, mass-specific enthalpy h, mass-specific volume v and and mass-specific entropy s for a wide range of pressures and temperatures (dry steam and saturation points, for calculation anywhere in the liquid-vapor spectrum). Values for u and s are arbitrarily set to zero at the triple point of water, so that all values for u, h and s elsewhere are expressed relative to that point. The L and V subscripts denote values corresponding to saturated liquid and saturated steam respectively.

T_sat. is saturation temperature (the temperature for which both states will be present at the given pressure). Likewise, p_sat. is saturation pressure (the pressure for which both states will be present at the given temperature). T_cr. and p_cr. correspond to critical values (the maximum values for which both states can be observed).

In these documents, ten combinations of decimal separators, thousand separators and paper sizes are proposed. One version is formatted according to the the recommendations of the BIPM in the 9th edition of the SI Brochure [2]. Leading and trailing zeroes are not written. The corresponding countries are indicated.

Data in these steam tables were produced by the US National Institute of Standards and Technology and are in the public domain. These documents were prepared by by Olivier Cleynen and are released under a Creative Commons Attribution (ccby) license. If this is useful to you, please cite the book these tables are extracted from [3] in your documents:
Olivier Cleynen, Engineering Thermodynamics, 2025. ISBN 9781446710067, thermodynamicsbook.com

References:
[1] W. Wagner and A. Pruß. “The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use”. In: Journal of Physical and Chemical Reference Data 31.2 (2002), pp. 387–535. doi: 10.1063/1.1461829 .
[2] International Bureau of Weights and Measures. The International System of Units / Le système international d’unités. 9th ed. v3.01, CC-by. BIPM, 2019. isbn: 9789282222720. url: https://www.bipm.org/en/publications/si-brochure.
[3] O. Cleynen. Engineering Thermodynamics. International edition with SI units. Olivier Cleynen / Thermodynamicsbook.com, 2025. isbn: 9781446710067. url: https://thermodynamicsbook.com/ .