Beaufort Scale Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the wind speed in km/h.
- Read the Beaufort force and description.
How it works
The wind speed is matched against the Beaufort scale's bands (force 0–12).
Worked example
30 km/h. = Force 5, 'Fresh breeze'.
Common mistakes
- Mixing up gusts with sustained wind — Beaufort describes sustained speed.
- Entering knots where km/h is expected (1 knot ≈ 1.85 km/h).
Frequently asked questions
What is the Beaufort scale?
A 0–12 scale linking wind speed to observable effects on land and sea, from calm (0) to hurricane force (12).
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.