Hurricane Category vs Pressure
| Cat | Pressure (mb / inches of Hg) |
| 1 | > 980 > 28.94 |
| 2 | 965 – 980 28.50 – 28.94 |
| 3 | 945 – 965 27.91 – 28.50 |
| 4 | 920 – 945 27.17 – 27.91 |
| 5 | < 920 < 27.17 |
| Cat | Pressure (mb / inches of Hg) |
| 1 | > 980 > 28.94 |
| 2 | 965 – 980 28.50 – 28.94 |
| 3 | 945 – 965 27.91 – 28.50 |
| 4 | 920 – 945 27.17 – 27.91 |
| 5 | < 920 < 27.17 |