Convert Square metres per hour to Square millimetres per second
Convert Square metres per hour (m²/h) to Square millimetres per second (mm²/s) instantly and accurately.
Conversion Formula
mm²/s = m²/h × 277.7777778
About Square metres per hour
The square metre per hour (m²/h) equals 1/3600 m²/s ≈ 277.8 cSt. It is convenient in European process engineering when kinematic viscosity is used alongside metre-based pipe geometry and hourly flow rates. 1 m²/h ≈ 277.8 cSt.
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.
Quick Reference Table
| Square metres per hour (m²/h) | Square millimetres per second (mm²/s) |
|---|---|
| 1 m²/h | 277.778 mm²/s |
| 2 m²/h | 555.556 mm²/s |
| 5 m²/h | 1388.89 mm²/s |
| 10 m²/h | 2777.78 mm²/s |
| 25 m²/h | 6944.44 mm²/s |
| 50 m²/h | 13888.9 mm²/s |
| 100 m²/h | 27777.8 mm²/s |