Mile per Hour to Beaufort Converter
Speed · unit-converter
Convert Mile per Hour to Beaufort with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations bridge through meters per second with fixed definitions (knot, international mile, Mach 1 = ISA sea level, Beaufort WMO bands at 10 m, vacuum c, plus linear SI and imperial rate units like km/s, fpm, ips, cm/s, and mm/s).
About Mile per Hour
Miles per hour is used for road speeds primarily in the United States, the United Kingdom, and some other countries.
About Beaufort
The Beaufort wind force scale (0–12) describes mean wind at 10 m height. This tool maps forces to midpoint m/s (WMO-style bands) and maps m/s back to a force index.
How to convert miles per hour to beaufort wind force
The Beaufort scale is a discrete wind force (0–12) based on mean wind at 10 m. This tool converts by passing through an equivalent value in meters per second (WMO-style m/s bands; midpoints when starting from a force).
From Beaufort: your input is rounded to the nearest whole force 0–12, then the midpoint m/s for that force is used before converting to beaufort.
To Beaufort: your speed is converted to m/s, then classified into the matching force 0–12.
Examples
Example #1: Convert 3 mph to beaufort
3 mph → 1.341120 m/s (equiv.) → 1.000000 beaufort. Beaufort: WMO mean wind at 10 m. From Beaufort rounds to force 0–12 then uses midpoint m/s; to Beaufort returns force index.
Result: 1 beaufort
Example #2: Convert 7 mph to beaufort
7 mph → 3.129280 m/s (equiv.) → 2.000000 beaufort. Beaufort: WMO mean wind at 10 m. From Beaufort rounds to force 0–12 then uses midpoint m/s; to Beaufort returns force index.
Result: 2 beaufort
Summary
Beaufort conversions use the WMO-style mean wind m/s ranges at 10 m. From Beaufort: your value is rounded to force 0–12, then the midpoint m/s for that force is used. To Beaufort: the m/s equivalent of your input is classified into a force 0–12. Other pairs with Mile per Hour and Beaufort still pass through that m/s bridge.
Relationship context
You are converting between Mile per Hour and Beaufort. Beaufort is a discrete wind scale; conversions use WMO mean-wind m/s bands at 10 m. Linear units (m/s, km/h, mph, knots, etc.) bridge through an equivalent m/s value. Mach and c use fixed m/s definitions for Mach 1 and vacuum c.
Conversion tables
| Mile per Hour (mph) | Beaufort (beaufort) |
|---|---|
| 0.1 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 3 |
| 9 | 3 |
| Mile per Hour (mph) | Beaufort (beaufort) |
|---|---|
| 10 | 3 |
| 20 | 5 |
| 30 | 6 |
| 40 | 8 |
| 50 | 9 |
| 60 | 10 |
| 70 | 11 |
| 80 | 12 |
| 90 | 12 |
| 100 | 12 |