lbf·s/ft²
pound-force second per square foot
Dynamic viscosityexact by definition
The pound-force second per square foot is exactly 47.88025898033584 Pa·s. It is the coherent viscosity unit of the US customary gravitational system, and it is identically the slug per foot second, which is how fluid mechanics texts usually write it.
Watch out: Water at 20 °C is about 2.09 × 10⁻⁵ lbf·s/ft², a number small enough that it is nearly always written in scientific notation and nearly always mis-keyed. The centipoise exists because of exactly this problem.
| 1 lbf·s/ft² | 47.880259 Pa·s |
Solvers that use dynamic viscosity