B to mph
Snapshot
1 Beaufort equals 1.870079 Miles per hour. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.
- Reference basis: This conversion is threshold-based and maps values to the nearest valid Beaufort level.
- Example: For 2 Beaufort, the mapped result equals 5.289381 Miles per hour.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Converter Calculator
1.870079 Miles per hour (mph)
SwitchExplanation
Formula: speed in m/s = 0.836 x B^(3/2), then convert to Miles per hour. Why: Beaufort is an empirical wind-force scale, so the route first maps force number to standard open-water wind speed before any unit change.
Beaufort (B): a standardized empirical wind-force scale from 0 to 12 used to describe observed wind conditions.
Miles per hour (mph): an imperial speed unit commonly used in weather and transport references.
This route is useful when translating Beaufort wind-force numbers into practical miles per hour values for marine, weather, and forecast references.
This conversion is not a simple shared factor in every direction: Beaufort routes use a standardized wind-force mapping, and reverse pages round to the nearest valid force level and clamp results to 0 through 12.
Common Conversion Values
| Beaufort (B) | Miles per hour (mph) |
|---|---|
| 0 | 0 |
| 1 | 1.870079 |
| 2 | 5.289381 |
| 3 | 9.717214 |
| 4 | 14.96063 |
| 5 | 20.908116 |
| 6 | 27.484432 |
| 7 | 34.634343 |
| 8 | 42.315051 |
| 9 | 50.492126 |
| 10 | 59.137082 |
| 11 | 68.225845 |
| 12 | 77.737713 |
Frequently Asked Questions
What standard is used for Beaufort conversion?
This page uses v = 0.836 * B^(3/2) at 10 m over open water, with exact unit factors for m/s, km/h, mph, and knots.
How is speed to Beaufort handled?
Reverse pages compute B = (v / 0.836)^(2/3), then round to the nearest integer and clamp the result to 0 through 12.
How do I switch direction?
Use Switch Units to open the dedicated mirror page for the reverse conversion.