# Power Converter

> Convert between watt, kilowatt, megawatt, horsepower (mechanical and metric), BTU/h, and more.

URL: https://uttir.com/power-converter
Categories: converters, math-tools
Privacy: Conversions run locally in your browser. No values are sent anywhere.

## About

Power is energy per unit time. The watt is the SI unit. Horsepower persists in the US for engines, motors, and machinery; metric horsepower is used in the EU and Japan. BTU/h is common for heating and cooling capacity.

This converter uses the watt as the base. The math is local.

## How to use

1. **Enter a value** — Type the power in any supported unit. The default is 1 kW.
2. **Pick the units** — The from/to dropdowns cover all supported power units.
3. **Check the quick-reference table** — For 1, 10, 100, 1000, 10000 W (or whatever the source unit is), the table shows the equivalent in the target unit.

## Examples

### 100 hp to kW

A 100-horsepower engine is about 74.6 kW.

Input:

```
100 hp
```

Output:

```
≈ 74.6 kW
```

## FAQ

### What is mechanical vs metric horsepower?

Mechanical horsepower (hp) is 745.7 W. Metric horsepower (CV in France, PS in Germany) is 735.5 W. They differ by about 1.4%.

### Why is BTU/h used for air conditioners?

BTU/h describes the rate of heat transfer; a 12,000 BTU/h AC removes 12,000 BTU per hour. The kW equivalent is 3.52 kW. US consumers are more familiar with the BTU/h number for AC sizing.

### How many watts is 1 hp?

1 mechanical horsepower = 745.7 watts. 1 metric horsepower = 735.5 watts.

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For the full HTML page with the live tool, visit https://uttir.com/power-converter.
This file is the markdown rendering at https://uttir.com/power-converter.md. See https://uttir.com/llms.txt for a site-wide summary.