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Watts to Horsepower

Convert W to hp quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.

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CONVERTED RESULT—
Decimal places
CONVERSION RULE

1 W equals approximately 0.00134102 hp.

How to use the Watts to Horsepower

  1. Enter the number you want to convert.
  2. Confirm the source unit shown beside the input.
  3. Choose decimal precision if you need more or less detail.
  4. Read the converted result.
  5. Copy the result when you need to use it elsewhere.

How the conversion works

1 W equals approximately 0.00134102 hp.

For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.

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Common W to hp conversions

Whp
1 W0.001341 hp
2 W0.002682 hp
5 W0.006705 hp
10 W0.01341 hp
20 W0.02682 hp
50 W0.067051 hp

Example

For example, entering 1 W gives approximately 0.001341 hp using the rule above. Change the input to test your own value.

Frequently asked questions

The Watts to Horsepower converts a value from W to hp using the conversion relationship described on this page.
Enter your value, review the source and destination units, choose the decimal precision and read or copy the result.
1 W equals approximately 0.00134102 hp.
Use enough precision for your purpose. Everyday estimates usually need fewer decimal places; technical work may require more.
It can be a useful reference calculation, but safety-critical, regulated, contractual or specialized work should be verified against the applicable authoritative standard.

Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.

Page reviewed: August 24, 2026.