square millimeter per second
Diffusivityexact by definition
The square millimetre per second is exactly 10⁻⁶ m²/s. It is the SI-preferred way of writing what lubricant specifications call the centistoke, since 1 mm²/s equals exactly 1 cSt. The factor is exact by definition.
Watch out: Because 1 mm²/s and 1 cSt are the same number, an ISO VG 46 oil is 46 mm²/s at 40 °C. If a datasheet gives one and a calculation wants the other, no arithmetic is needed.
| 1 | 1 |
One square millimeter per second in every diffusivity unit
| 1,000,000 | square micrometer per second (μm²/s) | |
| 31.5576 | square meter per year (m²/yr) | |
| 1 | square millimeter per second (mm²/s)this unit | |
| 1 | centistokes (cSt) | |
| 0.930002 | square foot per day (ft²/d) | |
| 0.0864 | square meter per day (m²/d) | |
| 0.0387501 | square foot per hour (ft²/h) | |
| 0.01 | square centimeter per second (cm²/s) | |
| 0.01 | stokes (St) | |
| 0.0036 | square meter per hour (m²/h) | |
| 0.00155 | square inch per second (in²/s) | |
| 0.0000107639 | square foot per second (ft²/s) | |
| 0.000001 | square meter per second (m²/s) |
Solvers that use diffusivity