PowerHorsepower to Watts

Horsepower to Watts

Snapshot

1 Horsepower equals 745.699872 Watts. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses exact watt-based power definitions.
Example: For 0.1 Horsepower, the result equals 74.569987 Watts.
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

745.699872 Watts (W)

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Machine access

Available to apps and AI agents

Horsepower to Watts 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: power
Source unit: horsepower
Target unit: watts

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": "power",
  "value": 1,
  "from": "horsepower",
  "to": "watts"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "power",
    "value": 1,
    "from": "horsepower",
    "to": "watts",
    "result": {
      "raw": 745.6998715822702,
      "display": "745.699872"
    },
    "canonicalPath": "/power/horsepower-to-watts/"
  }
}

Full API documentation

Explanation

Formula: Watts = Horsepower × 745.699872. Why: horsepower and metric horsepower each have their own fixed watt equivalence, so the calculator normalizes through watts before applying the exact target definition.

Horsepower (hp): a mechanical power unit with a fixed watt equivalent, commonly used for engines, motors, and machinery ratings.

Watts (W): the SI derived unit of power, equal to one joule of energy transferred per second.

This route is useful when comparing motor and engine ratings across watts, kilowatts, horsepower, and metric horsepower without mixing the underlying definitions.

This conversion is purely multiplicative because both units reduce through watts using fixed power definitions with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Horsepower = 745.699872 Watts.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Horsepower (hp)	Watts (W)
0.1	74.569987
1	745.699872
10	7,456.998716
100	74,569.987158
1,000	745,699.871582
10,000	7,456,998.715823

Questions & answers

Frequently Asked Questions

What is 1 horsepower in watts?

1 Horsepower equals 745.699872 Watts on this page.

Does this Horsepower to Watts page use the fixed watt equivalent for horsepower?

Yes. Horsepower and metric horsepower each use fixed watt equivalents on this page, so engine, motor, and machinery ratings stay aligned across the direct answer, calculator, and table.

When would I convert horsepower to watts?