Thermal Conductivity of Air at Different Temperatures
The thermal conductivity of dry air at room temperature (around 20 °C or 68 °F) is approximately 0.0264 watts per meter-kelvin (W/m·K). This means that air is not a good conductor of heat, which is why it is often used as an insulating material in various applications.
The following charts and table provide comprehensive data on the thermal conductivity of air 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.
| Temperature (°C) | Conductivity (W/m·K) |
|---|---|
| -70 | 0.0196 |
| -60 | 0.0204 |
| -50 | 0.0212 |
| -40 | 0.0219 |
| -30 | 0.0227 |
| -20 | 0.0235 |
| -10 | 0.0242 |
| 0 | 0.0249 |
| 10 | 0.0257 |
| 20 | 0.0264 |
| 30 | 0.0271 |
| 40 | 0.0278 |
| 50 | 0.0285 |
| 60 | 0.0292 |
| 70 | 0.0298 |
| 80 | 0.0305 |
| 90 | 0.0312 |
| 100 | 0.0318 |
| 110 | 0.0325 |
| 120 | 0.0331 |
| 130 | 0.0337 |
| 140 | 0.0344 |
| 150 | 0.0350 |
| 160 | 0.0356 |
| 170 | 0.0363 |
| 180 | 0.0369 |
| 190 | 0.0375 |
| 200 | 0.0381 |
| 210 | 0.0387 |
| 220 | 0.0393 |
| 230 | 0.0399 |
| 240 | 0.0405 |
| 250 | 0.0411 |
| 260 | 0.0417 |
| 270 | 0.0423 |
| 280 | 0.0429 |
| 290 | 0.0435 |
| 300 | 0.0441 |
| 310 | 0.0447 |
| 320 | 0.0453 |
| 330 | 0.0459 |
| 340 | 0.0465 |
| 350 | 0.0471 |
| 360 | 0.0477 |
| 370 | 0.0482 |
| 380 | 0.0488 |
| 390 | 0.0494 |
| 400 | 0.0500 |
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). “The Thermal Conductivity of Fluid Air.”