Phase Diagram Calculator
Determine the phase of a substance at given temperature and pressure. Find triple and critical points.
Conditions
24.9 C / 76.7 F
1.0000 atm / 101.33 kPa
Quick Conditions:
Phase at Given Conditions
Liquid
Pressure above vapor pressure curve
TReduced Temp (Tr)
0.461
PReduced Press (Pr)
0.004592
PvVapor Pressure
2.72 kPa
TbNormal BP
373.1 K
Triple Point:
T = 273.16 K (0.01 C)
P = 0.6117 kPa
Critical Point:
Tc = 647.10 K (373.95 C)
Pc = 22.06 MPa
Phase Diagram Features
Triple Point
Unique T and P where all three phases coexist in equilibrium.
Critical Point
Above this, no distinction between liquid and gas phases.
Supercritical
Properties of both liquid and gas above critical point.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Chemistry: The Central Science
by Brown, LeMay, Bursten
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.