Convert Horsepower (HP) to Watts (W)

1 HP = 745.7 W

How many Watts in a Horsepower?Printable chart →

Converting horsepower to watts is essential for understanding power output in various applications, from cars to appliances. With the conversion factor of 1 HP = 745.7 W, you can easily determine how much power is being utilized. Whether you're calculating engine power or electrical consumption, this conversion is crucial.

Horsepower (HP)

Watt (W)

745.7

≈ 745 45/64 W

Conversion Formula

W = HP × 745.7

Reverse: HP = W × 0.00134102

Quick mental math: To estimate quickly, remember that 1 HP is roughly equivalent to 750 W.

Conversion Examples

1 HP × 745.7 =

745.7 W

1 Horsepower = 745.7 Watts

5 HP × 745.7 =

3,728.5 W

5 Horsepower = 3,728.5 Watts

10 HP × 745.7 =

7,457 W

10 Horsepower = 7,457 Watts

25 HP × 745.7 =

18,642.5 W

25 Horsepower = 18,642.5 Watts

50 HP × 745.7 =

37,285 W

50 Horsepower = 37,285 Watts

100 HP × 745.7 =

74,570 W

100 Horsepower = 74,570 Watts

Horsepower to Watt Table

Quick convert your value:

HP =—W

Start:Step:Rows:Precision:

Horsepower (HP)	Watt (W)	Fraction
1	745.7	745 45/64
2	1,491.4	1491 13/32
3	2,237.1	2237 3/32
4	2,982.8	2982 51/64
5	3,728.5	3728 1/2
6	4,474.2	4474 13/64
7	5,219.9	5219 29/32
8	5,965.6	5965 19/32
9	6,711.3	6711 19/64
10	7,457	—
11	8,202.7	8202 45/64
12	8,948.4	8948 13/32
13	9,694.1	9694 3/32
14	10,439.8	10439 51/64
15	11,185.5	11185 1/2
16	11,931.2	11931 13/64
17	12,676.9	12676 29/32
18	13,422.6	13422 19/32
19	14,168.3	14168 19/64
20	14,914	—

Unit Definitions

What is a Horsepower (HP)?

ImperialUnited States, United Kingdom

Horsepower (HP) is a unit of measurement for power, primarily used to quantify the power of engines and motors.

History

The term horsepower was coined by James Watt in the late 18th century to help market his steam engines, providing a relatable measure for consumers. He determined that one horsepower equaled the amount of work a horse could perform over a specific time.

Current Use

Today, horsepower is still widely used in automotive, aerospace, and various engineering fields to describe the output of engines and motors.

Learn more about Horsepower

What is a Watt (W)?

Metric (SI)Worldwide

Watt (W) is the SI unit of power, representing the rate at which energy is transferred or converted.

History

Named after the Scottish inventor James Watt, the watt has been a standard unit of power since the adoption of the metric system in the 19th century. It originally described the power output of steam engines.

Current Use

Watt is commonly used in electrical and electronic devices to quantify power consumption, making it essential for understanding energy efficiency.

Learn more about Watt

Frequently Asked Questions

How much power does a typical car engine produce in watts?

Most modern cars have engines that produce between 100 to 300 horsepower. For example, if you have a car engine rated at 200 HP, you can calculate the power in watts by multiplying 200 by 745.7. This gives you 149,140 W. Understanding this conversion helps in comparing engine performance against electric vehicles, which often use kilowatts.

How is horsepower relevant in cooking appliances?

In cooking, blenders and mixers often list their power in horsepower. For instance, a professional blender might have a rating of 3 HP. Converting this to watts, you multiply 3 by 745.7, resulting in approximately 2,237.1 W. This helps consumers choose appliances that can handle tougher tasks like crushing ice or mixing dense batters.

What is the importance of horsepower in fitness equipment?

Fitness equipment like treadmills often specify their motors in horsepower. If a treadmill has a motor rated at 2 HP, it translates to about 1,491.4 W (2 x 745.7). Knowing this can guide buyers in selecting machines that can sustain higher intensity workouts without overheating, ensuring durability and performance.

How does horsepower affect construction machinery?

Construction machinery, such as excavators, is typically rated in horsepower to indicate power. For example, an excavator might have a power rating of 100 HP, equating to 74,570 W. This conversion is vital for contractors to assess whether the machinery can handle specific jobs, like digging or lifting heavy materials efficiently.

How can I compare electric motors to gasoline engines?

When comparing electric motors to gasoline engines, horsepower is a common metric. For example, if an electric motor is rated at 5 HP, converting it to watts gives you 3,728.5 W (5 x 745.7). This conversion allows for direct comparisons in power output, helping consumers decide between the efficiency of electric motors versus traditional gasoline engines.

Popular Power Conversions

Kilowatt to HorsepowerkW → HP Horsepower to KilowattHP → kW Watt to KilowattW → kW Kilowatt to WattkW → W Watt to HorsepowerW → HP

Convert Horsepower to Other Units

Horsepower to Megawatt→ MW Horsepower to Gigawatt→ GW Horsepower to Megawatt→ MW Horsepower to Gigawatt→ GW Horsepower to Metric Horsepower→ PS Horsepower to BTU per Hour→ BTU/h Horsepower to Kilovolt-Ampere→ kVA Horsepower to Ton of Refrigeration→ TR

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Watt to KilowattW → kW Watt to MegawattW → MW Watt to GigawattW → GW Watt to HorsepowerW → HP Watt to Metric HorsepowerW → PS