Water & Steam · IAPWS-IF97

What state is your steam in?

The international standard (IAPWS-IF97), the same formulation professional software uses, computed live. Get saturation properties, or the full state of compressed water and superheated steam, at a temperature and pressure you set.

Pressure unit

Saturation input

Specify by

Temperature (°C)

IAPWS-IF97 saturation is exact from 0.01 to 350 °C (0.006 to ~165 bar). The last stretch to the critical point (374 °C) needs Region 3, not in this version.

Saturation properties

Property	Sat. liquid (f)	Sat. vapor (g)

Conditions

Temperature (°C)

Pressure (bar)

Handles compressed liquid (0–350 °C) and superheated steam (up to 800 °C). The near-critical corner (Region 3) is out of range in this version.

State

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What state is your steam in?

Saturation input

Saturation propertiesDownload ↓

Conditions

StateDownload ↓

Saturation properties

State