Power Converter

Convert between watts and other practical power units.

Power
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Related Conversions
1 hp to W 2 hp to W 5 hp to W 10 hp to W 20 hp to W 50 hp to W 75 hp to W 100 hp to W 250 hp to W 500 hp to W 1,000 hp to W 1,200 hp to W
Reverse Conversions
1 W to hp 5 W to hp 10 W to hp 25 W to hp 50 W to hp 100 W to hp 250 W to hp 500 W to hp 1,000 W to hp 2,000 W to hp 5,000 W to hp 10,000 W to hp
More Power Conversions
1 BTU/h to W 50 kW to hp 100 kW to hp 200 hp to kW 250 hp to kW 1,000 W to BTU/h 1,000 kW to hp 1,800 W to BTU/h 2,500 hp to kW 5,000 hp to kW 12,000 BTU/h to kW 48,000 BTU/h to kW

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Common Benchmarks

Microwave 1000 W
E-bike motor 500 W
Laptop charger 65 W
Refrigerator average 150 W
Phone fast charge 30 W
Electric kettle 1500 W

Formula

W = hp × 745.6998715823

Example

Example: convert 150 horsepower to watts.

150 hp = 111854.98073734 W

Conversion table

horsepower (hp) watts (W)
1 hp 745.69987158 W
2 hp 1491.39974316 W
5 hp 3728.49935791 W
10 hp 7456.99871582 W
20 hp 14913.99743165 W
50 hp 37284.99357911 W
100 hp 74569.98715823 W

Explanation

These are both units.

How to convert horsepower to watts

  1. Start with the value in horsepower (hp).
  2. Multiply it by 745.6998715823.
  3. The result is the measurement in watts (W).

Example: 150 hp → 111854.98073734 W

Frequently Asked Questions

How much is 150 horsepower in watts?

150 horsepower is about 111854.98 watts.

How many watts is 1 horsepower?

1 horsepower is about 745.7 watts.

How many horsepower is 1 watt?

1 watt is about 0.001341 horsepower.

What is the difference between horsepower and watts?

Both measure power, but they are commonly used in different contexts. The watt (W) is the SI unit and is widely used in electrical/device specs, while horsepower (hp) is a traditional unit often used to describe engines and machinery.

Where are horsepower and watts used?

Watts are common in electrical power/consumption (devices, appliances, lighting). Horsepower is commonly used for mechanical power (engines, pumps, compressors, machinery).

Why does 1 horsepower equal 745.7 watts?

Because horsepower (hp) is defined in terms of watts. In particular, 1 mechanical hp is about 745.7 W, so converting to watts uses that fixed definition.