Thermal Conductivity of Water at Different Temperatures

Water has relatively low thermal conductivity compared to many other substances, which means it is not a very effective conductor of heat. The thermal conductivity of water at room temperature (around 20°C or 68°) is approximately 0.6 W/m·K.

The following charts and table provide comprehensive data on the thermal conductivity of water at different temperature values, taken under 1 atmospheric (atm) pressure. (1 atm = 101,325 Pa)

Click on the icon to switch between SI (W/m·K) and Imperial (BTU·in/hr·ft2·°F) units.

Chart of water thermal conductivity at different temperatures in (W/m·K) Chart of water thermal conductivity at different temperatures in (Btu·in/hr·ft²·°F)
Thermal Conductivity of Water at Different Temperatures
Temperature (°C)
Thermal conductivity (W/m·K)
00.5556
50.5678
100.5788
150.5888
200.5980
250.6065
300.6144
350.6217
400.6285
450.6348
500.6406
550.6460
600.6510
650.6556
700.6598
750.6636
800.6670
850.6701
900.6728
950.6752
990.6768
Related Tables
References: 1) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016. 2) National Institute of Standards and Technology (NIST). “Standard Reference Data for the Thermal Conductivity of Water.”