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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.

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 weight, Dynamic and kinematic viscosity, Enthalpy and entropy, Heat of vaporization, Ionization Constant, pK_w, of normal and heavy water, Prandtl number, Properties 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 .
water_MP_P_C
water_MP_P_F

water_MP_P_F

Ice - Melting Points vs. Pressure
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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