Why is ordinary water missing? Does this replace the steam calculator?

No. Ordinary water/steam is owned by /tools/steam-calculator (IAPWS-IF97); this tool does not duplicate that path. Heavy water (D2O) is not covered by the steam table and can be selected here. Both tools share the same platform credit wallet for batch Excel.

Why did saturation modes disappear for some fluids?

Because that fluid has no saturation curve (typical for incompressible heat-transfer oils and brines). The calculator hides saturation options instead of showing disabled choices; use single-point T–P or batch temperature / fixed-pressure sweeps.

Fluid Properties Calculator — CoolProp 8.0.0 Multi-Fluid Tables

Multi-fluid properties via CoolProp 8.0.0 (server-side)

This tool evaluates thermodynamic and transport properties using CoolProp 8.0.0 (HEOS pure/pseudo-pure fluids and incompressible heat-transfer fluids), including heavy water (HeavyWater). Ordinary water/steam is not calculated here — use the IAPWS-IF97 steam calculator to avoid duplicating that product. Single-point and batch lookups run on our servers; results are tied to this pinned CoolProp release.

References (provenance only)

CoolProp 8.0.0 (MIT) — open-source thermophysical property library; this site pins this version and may not track every upstream release. Equation-of-state provenance per fluid as documented by CoolProp for that release.
Ordinary water/steam: /tools/steam-calculator (IAPWS-IF97) — H2O is not offered here; heavy water (HeavyWater) is available in this tool.

Model assumptions

Ordinary water (H2O) and steam are not in this catalog — use /tools/steam-calculator (IAPWS-IF97). Heavy water (HeavyWater / D2O) is outside the steam-table scope and remains available here. Missing transport properties (μ, k, …) are returned as unavailable.
Incompressible HTF / brine fluids (INCOMP::*) have no vapor–liquid saturation curve in CoolProp. For those fluids the UI hides saturation modes and offers only single-phase T–P (and batch fixed-P / T sweeps). HEOS pure and pseudo-pure fluids keep saturation-by-T and saturation-by-P when a saturation curve exists.

This tool does not encode inputs in the URL; share the page link only. Batch Excel requires sign-in and may debit platform credits.

Frequently asked questions

Why is ordinary water missing? Does this replace the steam calculator?: No. Ordinary water/steam is owned by /tools/steam-calculator (IAPWS-IF97); this tool does not duplicate that path. Heavy water (D2O) is not covered by the steam table and can be selected here. Both tools share the same platform credit wallet for batch Excel.
Why did saturation modes disappear for some fluids?: Because that fluid has no saturation curve (typical for incompressible heat-transfer oils and brines). The calculator hides saturation options instead of showing disabled choices; use single-point T–P or batch temperature / fixed-pressure sweeps.