in²/s
square inch per second
Diffusivityexact by definition
The square inch per second is exactly 6.4516 × 10⁻⁴ m²/s. It appears in American thermal analysis, where thermal diffusivity is occasionally tabulated in inch units to match a geometry given in inches, and in some hydraulic fluid specifications.
| 1 in²/s | 645.16 mm²/s |
Solvers that use diffusivity