Marine Beaufort Scale Calculator
Look up Beaufort force from a non-negative whole wind speed in knots and read reference sea-surface patterns.
A QUICK WALKTHROUGH
How to use this tool
- Whole wind speed (kn, ≥ 0)
- Calculate using the stated formula or table.
- Read the scope, then copy or download the report.
Formula and units
Integer knot bands: 0; 1–3; 4–6; 7–10; 11–16; 17–21; 22–27; 28–33; 34–40; 41–47; 48–55; 56–63; 64+ map to Beaufort 0–12. No continuous boundary is inferred.
Scope
Descriptions are reference associations, not measured sea conditions, wave heights, a forecast, safety or seaworthiness advice. The public-domain NWS table supplies the bands; the explanations here are independently written and are not official NWS material or endorsed by NOAA/NWS.
Local processing
Inputs stay in your browser. The report includes the inputs, result and scope.
GOOD TO KNOW
Common questions
What does this result cover?
Descriptions are reference associations, not measured sea conditions, wave heights, a forecast, safety or seaworthiness advice. The public-domain NWS table supplies the bands; the explanations here are independently written and are not official NWS material or endorsed by NOAA/NWS.