Horsepower to Watts

Convert Horsepower to Watt instantly. Quick and accurate power conversion for electrical, mechanical, and HVAC applications.

Mechanical Horsepower to Watt Converter

This tool converts Mechanical Horsepower (hp) to Watt (W) instantly and accurately. Type a value and the result appears as you type — ideal for motors, appliances, HVAC equipment, and engineering work.

Both hp and W are units of power (energy per unit of time). This converter uses the watt (W) as a common reference, so every result is precise and standards-based.

Common Applications

Engineering & Motors

Convert equipment ratings between power systems when sizing or comparing motors and machinery.

HVAC & Energy

Match heating and cooling specifications across regional standards for accurate system planning.

Education & Reference

Understand how power units relate and verify homework, spec sheets, or quick calculations.

How to Convert hp to W

Enter the hp value

Type your number into the first input field. Results update instantly — no convert button needed.

Read the W result

The converted value appears in the second field, formatted with thousand separators for easy reading.

Reverse or change units

Click the swap button to flip the direction, or open a unit dropdown to pick any other power unit.

Copy the result

Use the copy button next to a value to paste it into documents, spreadsheets, or spec sheets.

Practical Example

For example, 1 hp equals 745.70 W using the factor above.

Features

Conversion Formula

To convert Mechanical Horsepower to Watt, multiply the hp value by 745.70:

Formula	Description
W = hp × 745.70	Forward — Multiply hp by the factor to get W.
hp = W × 0.00134102	Reverse — Multiply W by this factor to get back to hp.

Built-in Tools

Instant Conversion

Calculations run as you type with precise, standards-based factors.

Bidirectional Input

Type in either field; the other updates automatically in both directions.

Searchable Units

Open a dropdown to search and switch among all supported power units.

Quick Reference

A built-in table lists common hp-to-W values for fast lookups.

Adjustable Precision

Use the Customize panel to set decimal places and view many units at once.

Copy & Mobile-Ready

One-tap copy and a responsive layout that works on any device.

Privacy by design: every calculation runs locally in your browser. No values are uploaded or stored anywhere.

Frequently Asked Questions

How do I convert hp to W?

Multiply the hp value by 745.70. For example, 1 hp = 745.70 W.

What is the formula for hp to W?

The formula is W = hp × 745.70. To convert back: hp = W × 0.00134102.

What is Mechanical Horsepower (hp)?

Mechanical horsepower used in the US and UK. Equal to 745.7 watts. Standard for rating vehicle engines and industrial motors.

What is Watt (W)?

The SI base unit of power. One watt equals one joule per second. Used for light bulbs, small electronics, and precise measurements.

Is this converter accurate?

Yes. It uses internationally recognized conversion factors with high precision, suitable for engineering, HVAC, and automotive work.

Can I convert other power units?

Yes. Use the dropdown menus to pick from many units including Watts, Kilowatts, Megawatts, Horsepower (hp/PS), BTU/h, Tons of Refrigeration, and more.