The pascal or “Pa” is a unit used to measure pressure differences between two areas using a manometer. For More
| Unit to pascal | 25 Pa | 50 Pa | 75 Pa |
| 1 atmosphere = 101,325 Pa | 0.000 247 | 0.000 49 | 0.000 74 |
| 1 bar = 100,000 Pa | 0.000 25 | 0.000 50 | 0.000 75 |
| 1 PSI = 6,894.76 Pa | 0.003 63 | 0.007 25 | 0.0108 |
| 1 in Hg = 3,386 Pa | 0.007 | 0.015 | 0.022 |
| 1 in H2O = 249 Pa | 0.10 | 0.20 | 0.30 |
| 1 mm Hg = 133 Pa | 0.19 | 0.38 | 0.56 |
| 1 millibar = 100 Pa | 0.25 | 0.50 | 0.75 |
| 1 PSF = 47.88 Pa | 0.52 | 1.05 | 1.56 |
