Specific heat of dry air vs temperature
Dry air at 1 atm from −50 to 300 °C — the ideal-gas density and Sutherland viscosity behind every duct, fan and drag calculation.
Specific heat in kJ/(kg·K), from -50 to 300 °C. The chart and the table below are the same numbers; the table is the one you can copy.
| Density | 1.2041 kg/m³ |
| Dynamic viscosity | 0.018133 mPa·s |
| Thermal conductivity | 0.025706 W/(m·K) |
| Temperature (°C) | Specific heat (kJ/(kg·K)) | Row |
|---|---|---|
| -50 | 1.0045 | interpolated |
| -25 | 1.0059 | interpolated |
| 0 | 1.0065 | interpolated |
| 25 | 1.0069 | interpolated |
| 50 | 1.0077 | interpolated |
| 75 | 1.0089 | interpolated |
| 100 | 1.011 | interpolated |
| 125 | 1.0138 | interpolated |
| 150 | 1.017 | interpolated |
| 175 | 1.0207 | interpolated |
| 200 | 1.0249 | interpolated |
| 225 | 1.0296 | interpolated |
| 250 | 1.0347 | interpolated |
| 275 | 1.0399 | interpolated |
| 300 | 1.0453 | interpolated |
Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.
Ideal gas law with R = 287.0528 J/(kg·K); Sutherland (1893) viscosity; Incropera, Fundamentals of Heat and Mass Transfer, Table A.4 for cp and k · validated -50 to 300 °C · interpolated between 8 published anchors (values held, not extrapolated, past the ends)