Convert Square millimetres per second to Square inches per hour
Convert Square millimetres per second (mm²/s) to Square inches per hour (in²/h) instantly and accurately.
Conversion Formula
in²/h = mm²/s × 5.58001116
About Square millimetres per second
The square millimetre per second (mm²/s) equals 10⁻⁶ m²/s, numerically identical to 1 centistoke (cSt). It is the preferred SI-consistent expression: ISO 3104, DIN 51562, and ASTM viscosity standards all use mm²/s interchangeably with cSt. Water at 20 °C ≈ 1.004 mm²/s; SAE 10W-30 at 100 °C: 9.3-12.5 mm²/s. 1 mm²/s = 1 cSt.
About Square inches per hour
The square inch per hour (in²/h) equals 0.0254²/3600 ≈ 1.792 × 10⁻⁷ m²/s. It is found in US heat-transfer and diffusion textbooks that use the BTU-inch-hour unit system alongside thermal diffusivity tables. 1 in²/h ≈ 0.1792 cSt.
Quick Reference Table
| Square millimetres per second (mm²/s) | Square inches per hour (in²/h) |
|---|---|
| 1 mm²/s | 5.58001 in²/h |
| 2 mm²/s | 11.16 in²/h |
| 5 mm²/s | 27.9001 in²/h |
| 10 mm²/s | 55.8001 in²/h |
| 25 mm²/s | 139.5 in²/h |
| 50 mm²/s | 279.001 in²/h |
| 100 mm²/s | 558.001 in²/h |