Convert Square feet per second to Square millimetres per second
Convert Square feet per second (ft²/s) to Square millimetres per second (mm²/s) instantly and accurately.
Conversion Formula
mm²/s = ft²/s × 92903.04
About Square feet per second
The square foot per second (ft²/s) equals 0.3048² = 0.09290304 m²/s. It is the coherent FPS kinematic viscosity unit, used in US aerospace, hydraulic machinery, and civil/coastal engineering. Water at 20 °C ≈ 1.082 × 10⁻⁵ ft²/s; air at 20 °C ≈ 1.632 × 10⁻⁴ ft²/s. 1 ft²/s ≈ 92903 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 feet per second (ft²/s) | Square millimetres per second (mm²/s) |
|---|---|
| 1 ft²/s | 92903 mm²/s |
| 2 ft²/s | 185806 mm²/s |
| 5 ft²/s | 464515 mm²/s |
| 10 ft²/s | 929030 mm²/s |
| 25 ft²/s | 2322580 mm²/s |
| 50 ft²/s | 4645150 mm²/s |
| 100 ft²/s | 9290300 mm²/s |