Beaufort ScaleMiles per Hour to Beaufort

mph to B

Methodology·How We Verify

Snapshot

1 Miles per hour equals 1 Beaufort.

Reference basis: This conversion is threshold-based and maps values to the nearest valid Beaufort level.
Example: For 1.870079 Miles per hour, the mapped result equals 1 Beaufort.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

1 Beaufort (B)

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API and AI agent access

mph to B.

Machine-readable identifiers

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

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

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

Essential response

{
  "ok": true,
  "conversion": {
    "family": "beaufort-scale",
    "value": 1,
    "from": "mile_per_hour",
    "to": "beaufort",
    "result": {
      "raw": 0.6588098311269763,
      "normalized": 1,
      "display": "1"
    },
    "canonicalPath": "/beaufort-scale/miles-per-hour-to-beaufort/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

Input speed is first converted to m/s, then B = (v / 0.836)^(2/3) is applied, rounded to the nearest integer, and clamped to the standard Beaufort range 0-12.

Method & Reference

Method basis: deterministic threshold mapping shown in Snapshot.
Equation reference: B = round((v / 0.836)^(2/3)), clamped to 0-12
Consistency rule: threshold, rounding, and clamping rules stay fixed so outputs remain reproducible.

Common Conversion Values

Miles per hour (mph)	Beaufort (B)
0	0
1.870078740157478	1
5.289381434072593	2
9.717214176321445	3
14.960629921259825	4
20.908115931346437	5
27.484432153275787	6
34.63434294995966	7
42.31505147258074	8
50.49212598425191	9
59.1370822275582	10
68.22584460475176	11
77.73771341057156	12

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.