Horsepower to Microwatts Converter
Enter the power in horsepower below to convert it to microwatts.
Convert Horsepower (hp) to Microwatts
Enter a value in horsepower (hp) (hp) to convert to microwatts (µW).
Horsepower to Microwatt Conversion Table
Table showing various horsepower measurements converted to microwatts. Click any preset value or arrow to load it into the converter.
| Horsepower (hp) (hp) | Microwatts (µW) |
|---|---|
| 0.0000001 hp | 74.5699872 µW |
| 0.0000002 hp | 149.1399743 µW |
| 0.0000003 hp | 223.7099615 µW |
| 0.0000004 hp | 298.2799486 µW |
| 0.0000005 hp | 372.8499358 µW |
| 0.0000006 hp | 447.4199229 µW |
| 0.0000007 hp | 521.9899101 µW |
| 0.0000008 hp | 596.5598973 µW |
| 0.0000009 hp | 671.1298844 µW |
| 0.00000001 hp | 7.4569987 µW |
How to Convert Horsepower to Microwatts
To convert horsepower to microwatts, multiply the power by the following conversion ratio: 745,699,871.58227 microwatts/horsepower.
Since one horsepower is equal to 745,699,871.58227 microwatts, you can use this simple formula to convert:
The power in microwatts is equal to the power in horsepower multiplied by 745,699,871.58227.
For example, here's how to convert 5 horsepower to microwatts using the formula above.
How Many Microwatts Are in a Horsepower?
There are 745,699,871.58227 microwatts in a horsepower, which is why we use this value in the formula above.
Our horsepower to microwatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Horsepower and microwatts are both units used to measure power. Keep reading to learn more about each unit.
What Is a Horsepower?
A horsepower is a unit of power equal to 745.6998716 watts (W), the base unit for power. Imperial mechanical horsepower (550 ft·lbf/s ≈ 745.7 W). [1]
The horsepower is classified as a US customary and imperial unit of power. Horsepower can be abbreviated as hp; for example, 1 horsepower can be written as 1 hp.
When working with horsepower (hp) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, horsepower (hp) are widely used across standard power applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Microwatt?
A microwatt is a unit of power equal to 1/1,000,000 of a watt (0.000001 W). One-millionth of a Watt. [2]
The microwatt is classified as a metric and SI-compatible unit of power. Microwatts can be abbreviated as µW; for example, 1 microwatt can be written as 1 µW.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microwatt (µW) a convenient decimal multiple of the watt (W).
In practice, microwatts (µW) are widely used across fine-tolerance laboratory, analytical, and micro-scale power measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting power between horsepower (hp) and microwatts (µW), keep full floating-point precision (1 hp = 745,699,871.58227 µW; 1 µW = 1.341022e-9 hp) during intermediate calculations and round only the final microwatt figure to match your instrument tolerance.
More Horsepower & Microwatt Conversions
Need to calculate in the opposite direction? Use our microwatts to horsepower (hp) calculator to switch your starting unit immediately. You can also explore related tools such as converting microwatts to horsepower (hp), converting horsepower (hp) to watts, or converting horsepower (hp) to kilowatts.
Convert from Horsepower
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Horsepower (hp) (hp) to Microwatts (µW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Horsepower (Mechanical) (hp) & Microwatt (µW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (hp to µW)