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Ice and Water - Melting Points vs. Pressure

Online calculator, figures and tables with melting points of ice to water at pressures ranging from 0 to 29000 psia (0 to 2000 bara). Temperature given as °C, °F, K and °R.

Melting point: The temperature at which a solid turns into a liquid.

The melting point of water is dependent of the pressure above the ice (solid water), and the melting point or freezing temperature decreases with increasing pressure. By definition 0 °C is at the melting point of water at 1 atmosphere pressure.

Online Ice to Water Melting Point Calculator

The calculator below can be used to calculate the water melting point at given pressures.
The output temperature is given as °C, °F, K and °R.

Note! Pressure must be within the ranges 0.01-2000 bara, 0.1-29 000 psia, 5-1500 000 mm Hg or 0.2-59000 in Hg.

Pressure

Choose the actual unit of pressure:

bara psia mm Hg in Hg

See Water and Heavy Water  for thermodynamic properties at standard condtions.
See also other properties of Water at varying temperature and pressure: Boiling points at high pressure, Boiling points at vacuum pressure, Density and specific weightDynamic and kinematic viscosity, Enthalpy and entropy, Heat of vaporization, Ionization Constant, pKw, of normal and heavy water, Prandtl numberProperties at Gas-Liquid Equilibrium Conditions, Saturation pressure, Specific gravity, Specific heat (heat capacity), Specific volume, Thermal conductivity, Thermal diffusivity and Vapour pressure at gas-liquid equilibrium.

 Pressure Temperature [MPa] [bara] [psia] [mm Hg] [in Hg] [°C] [°F] 0.000612 0.00612 0.089 4.59 0.18 0.01 32.02 0.1 1.01325 14.7 750 29.5 0.0026 32.00 1 10 145 7501 295 -0.064 31.88 2 20 290 15001 591 -0.14 31.75 5 50 725 37503 1476 -0.37 31.33 10 100 1450 75006 2953 -0.75 30.65 15 150 2176 112509 4429 -1.14 29.95 20 200 2901 150012 5906 -1.54 29.23 30 300 4351 225019 8859 -2.36 27.75 40 400 5802 300025 11812 -3.21 26.22 50 500 7252 375031 14765 -4.09 24.64 60 600 8702 450037 17718 -5.00 23.00 70 700 10153 525043 20671 -5.94 21.31 80 800 11603 600049 23624 -6.91 19.56 90 900 13053 675056 26577 -7.91 17.76 100 1000 14504 750062 29530 -8.94 15.91 120 1200 17405 900074 35436 -11.09 12.04 140 1400 20305 1050086 41342 -13.35 7.97 160 1600 23206 1200099 47248 -15.73 3.69 180 1800 26107 1350111 53154 -18.22 -0.80 200 2000 29008 1500123 59060 -20.83 -5.49

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Temperature

oC
oF

Length

m
km
in
ft
yards
miles
naut miles

Area

m2
km2
in2
ft2
miles2
acres

Volume

m3
liters
in3
ft3
us gal

Weight

kgf
N
lbf

Velocity

m/s
km/h
ft/min
ft/s
mph
knots

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O

Flow

m3/s
m3/h
US gpm
cfm

3 10