Meteosail
| Beaufort | Knots | m/s | Km/h |
| 0 Bft. | below 1 | below 0.3 m/s | below 1 Km/h |
| 1 Bft. | 1-3 kt | 0.3-1.5 m/s | 1-5 Km/h |
| 2 Bft. | 4-6 kt | 1.6-3.3 m/s | 6-11 Km/h |
| 3 Bft. | 7-10 kt | 3.4-5.4 m/s | 12-19 Km/h |
| 4 Bft. | 11-15 kt | 5.5-7.9 m/s | 20-28 Km/h |
| 5 Bft. | 16-21 kt | 8.0-10.7 m/s | 29-38 Km/h |
| 6 Bft. | 22-27 kt | 10.8-13.8 m/s | 39-49 Km/h |
| 7 Bft. | 28-33 kt | 13.9-17.1 m/s | 50-61 Km/h |
| 8 Bft. | 34-40 kt | 17.2-20.7 m/s | 62-74 Km/h |
| 9 Bft. | 41-47 kt | 20.8-24.4 m/s | 75-88 Km/h |
| 10 Bft. | 48-55 kt | 24.5-28.4 m/s | 89-102 Km/h |
| 11 Bft. | 56-63 kt | 28.5-32.6m/s | 103-117 Km/h |
| 12 Bft. | more than 64 kt | more than 32.7m/s | more than 118 Km/h |