Power Converter

About the Power Converter

The Power Converter converts power converterfrom one unit to another using the exact internationally defined conversion factors. Type a value, choose your source and target units, and the converted result is shown instantly — no waiting, no page reload.

Manual conversion is error-prone because it means memorizing ratios (how many feet in a meter, how many pints in a liter). This tool removes that friction: the conversion factor is built in, and the math is done to full precision with no rounding until the final displayed number.

Common uses: people reach for this tool when they need to look up a watts to horsepower converter, kw to hp converter, watts to kilowatts calculator, or btu per hour to watts.

How to Use This Tool

1. Enter the value you want to convert in the input field.
2. Select the unit you are converting from.
3. Select the unit you want to convert to.
4. The converted value appears instantly. Adjust either unit to compare across the board.
5. Copy the result if you need it elsewhere. Your input is never sent anywhere.

Why Use an Online Converter?

Browser-based tools like this one have a few real advantages over installed software or manual methods:

• No installation. It opens instantly in any browser, on any operating system.
• Private by default. Everything runs locally, so your data stays on your device.
• Always up to date.There's nothing to update — you always get the latest version when you load the page.
• Free and unlimited. Use it as often as you like, with no account and no caps.

Formula & How It Works

The Power Converter is based on the following formula:

1 hp = 745.699872 W
1 PS = 735.49875 W
1 kW = 1000 W
1 BTU/s = 1055.06 W

Variables: W = watts, the SI unit of power (1 W = 1 J/s) kW = kilowatts hp = mechanical horsepower (550 ft·lb/s) PS = metric horsepower, used in Europe (75 kgf·m/s) BTU/s = British thermal units per second

Power is energy per second, so 1 W = 1 J/s. Mechanical horsepower is defined as 550 foot-pounds per second = 745.699872 W, while metric horsepower (PS) is 75 kilogram-force meters per second = 735.49875 W, about 1.4% smaller, which is why European and American engine ratings differ slightly.

Worked example: Convert a 150 kW motor to horsepower: W = 150 × 1000 = 150,000 W hp = 150,000 ÷ 745.699872 ≈ 201.2 hp PS = 150,000 ÷ 735.49875 ≈ 203.9 PS Reverse: 201.2 hp × 745.699872 ≈ 150,047 W ≈ 150 kW

Frequently Asked Questions