Beaufort ScaleBeaufort to Miles per Hour

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.

Interactive conversion

Converter Calculator

1.870079 Miles per hour (mph)

Switch

Machine access

Available to apps and AI agents

B to mph can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

Conversion family: beaufort-scale
Source unit: beaufort
Target unit: mile_per_hour

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "beaufort-scale",
  "value": 1,
  "from": "beaufort",
  "to": "mile_per_hour"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "beaufort-scale",
    "value": 1,
    "from": "beaufort",
    "to": "mile_per_hour",
    "result": {
      "raw": 1.870078740157478,
      "display": "1.870079"
    },
    "canonicalPath": "/beaufort-scale/beaufort-to-miles-per-hour/"
  }
}

Full API documentation

Explanation

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.

Method & Reference

Method basis: deterministic threshold mapping shown in Snapshot.
Equation reference: v (m/s) = 0.836 * B^(3/2)
Consistency rule: threshold, rounding, and clamping rules stay fixed so outputs remain reproducible.

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

Questions & answers

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.