Beaufort Scale Calculator
About the Beaufort Scale Calculator
The Beaufort Scale Calculator is a scientifically accurate, real-time online tool that instantly determines the Beaufort wind force number (0–12) and corresponding description from observed wind speed or visible sea/land effects. It strictly follows the official Beaufort scale as defined by the World Meteorological Organization (WMO) and UK Met Office, using the standard wind speed ranges at 10 m height and authentic observational criteria originally developed by Admiral Sir Francis Beaufort in 1805 and modernized in 1946. This calculator provides trustworthy results for mariners, meteorologists, farmers, outdoor enthusiasts, and emergency responders worldwide.
More details on the history and specifications at Beaufort Scale on Wikipedia.
Importance of the Beaufort Scale Calculator
The Beaufort scale remains the global standard for describing wind strength without instruments, enabling consistent communication of wind conditions across languages and cultures. Force 6 (“strong breeze”) creates large waves, Force 8 (“gale”) breaks twigs, and Force 12 (“hurricane”) causes widespread devastation. In agriculture, high Beaufort forces damage crops, delay spraying, increase erosion, and affect livestock welfare. Accurate wind force assessment helps farmers decide when to harvest delicate fruits, secure greenhouses, or postpone fieldwork. This calculator instantly translates measured wind speed or visual observations into the universally recognized Beaufort number, supporting safe and efficient operations promoted by Agri Care Hub.
Purpose of the Beaufort Scale Calculator
Core functions:
- Convert wind speed (knots, m/s, km/h, mph) to Beaufort force 0–12
- Reverse lookup: select observed land/sea effects to get Beaufort number
- Display official WMO description, wind speed range, wave height, and land/sea effects
- Provide safety and agricultural guidance for each force level
When and Why You Should Use It
Use this tool when you:
- Have anemometer readings and need the official Beaufort description
- Observe sea state or tree movement and want the corresponding force
- Plan farm operations affected by wind (spraying, harvesting, livestock)
- Teach meteorology or maritime safety
Scientific Background & Official Scale
The modern Beaufort scale uses wind speed at 10 m above surface. Approximate relation: Force B ≈ (wind speed in knots / 5) + adjustment.
Official ranges (knots):
| Force | Description | Knots | m/s | Land Effects |
|---|---|---|---|---|
| 0 | Calm | <1 | <0.3 | Smoke rises vertically |
| 4 | Moderate breeze | 11–16 | 5.5–7.9 | Small branches move |
| 7 | Near gale | 28–33 | 13.9–17.1 | Large trees sway |
| 10 | Storm | 48–55 | 24.5–28.4 | Trees uprooted |
| 12 | Hurricane | ≥64 | ≥32.7 | Widespread devastation |
Validation: Matches current WMO and UK Met Office specifications exactly.
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