square foot per day
Diffusivityexact by definition
The square foot per day is exactly 0.09290304/86400 m²/s. It is the hydrogeologist's unit in the United States, where the coefficient of consolidation and the aquifer diffusivity that governs how fast a pressure change propagates are both tabulated in ft²/day.
Watch out: Transmissivity, which sounds similar and is also reported in ft²/day, is a different quantity: it is hydraulic conductivity times aquifer thickness and has the same dimensions by coincidence rather than by meaning. A ft²/day figure needs its quantity named before it can be used.
| 1 | 1.0752667 |
One square foot per day in every diffusivity unit
| 1,075,270 | square micrometer per second (μm²/s) | |
| 33.9328 | square meter per year (m²/yr) | |
| 1.07527 | square millimeter per second (mm²/s) | |
| 1.07527 | centistokes (cSt) | |
| 1 | square foot per day (ft²/d)this unit | |
| 0.092903 | square meter per day (m²/d) | |
| 0.0416667 | square foot per hour (ft²/h) | |
| 0.0107527 | square centimeter per second (cm²/s) | |
| 0.0107527 | stokes (St) | |
| 0.00387096 | square meter per hour (m²/h) | |
| 0.00166667 | square inch per second (in²/s) | |
| 0.0000115741 | square foot per second (ft²/s) | |
| 0.00000107527 | square meter per second (m²/s) |
Solvers that use diffusivity