Watt Converter
Convert Watt to Horsepower and more • 80 conversions
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Unit Explanations
WattW
Source UnitThe watt (symbol: W) is the SI unit of power, defined as the rate of energy transfer equivalent to one joule per second. It measures the amount of energy conversion or transfer that occurs per unit time. In practical terms, it quantifies the rate at which work is done or energy is consumed. The watt is a derived unit in the International System of Units (SI), and it is used extensively in various fields such as electricity, mechanics, and thermodynamics to quantify power output or consumption.
Current Use
The watt is widely used across the globe to measure electrical power, mechanical power, and heat transfer. It serves as a fundamental unit in the fields of electrical engineering, physics, and many applied sciences. It is crucial for calculating energy consumption in households, industries, and for determining the power output of engines and machinery.
Fun Fact
One watt is equivalent to 1/746th of a horsepower.
Horsepowerhp
Target UnitHorsepower is a unit of measurement for power, which quantifies the rate at which work is done. It is traditionally used to express the power output of engines or motors. One horsepower is defined as the power needed to lift 550 pounds one foot in one second, equivalent to 745.7 watts in the SI system. The term was originally formulated to compare the output of steam engines with the power of draft horses, which were a primary source of industrial power in the 18th century.
Current Use
Horsepower remains a common unit of power measurement in the automotive industry, where it is used to specify the power output of engines. It is also used in various other industries, such as those involving pumps, turbines, and electric motors. Despite the widespread adoption of the watt as the SI unit of power, horsepower is still frequently used in non-SI contexts, particularly in the United States and the United Kingdom.
Fun Fact
James Watt's first estimate of horsepower was based on the power of a brewery horse.
Convert Watts to Horsepower (W to hp)
Convert Watts (W) to Horsepower (hp) for automotive, electrical, and mechanical engineering. Essential for comparing motor specifications, understanding vehicle power ratings, and working with international power measurements. This converter bridges the metric and imperial power systems.
To convert watts to mechanical horsepower, divide by 745.7 (or multiply by 0.00134102). For kilowatts: 1 kW ≈ 1.341 hp. Note: Metric horsepower (PS) uses a slightly different factor: 1 W = 0.001359 PS.
Watt (W)
Definition
The watt (symbol: W) is the SI unit of power, defined as one joule per second. It measures the rate of energy transfer. Named after Scottish inventor James Watt for his contributions to the steam engine.
Origins & History
The watt was adopted by the Second Congress of the British Association for the Advancement of Science in 1882. It was named after James Watt (1736-1819), who improved the steam engine's efficiency. The unit was included in the SI system in 1960.
Horsepower (hp)
Definition
Horsepower (symbol: hp) is a unit of power. The most common type is mechanical horsepower, equal to approximately 745.7 watts. Metric horsepower (PS, CV, pk) equals approximately 735.5 watts.
Origins & History
James Watt defined horsepower in the late 18th century to market his steam engines. He calculated that a typical mill horse could turn a 12-foot radius wheel 144 times per hour, determining that 1 hp = 550 foot-pounds per second.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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💡 Pro Tip: For the reverse conversion ( → ), divide by the conversion factor instead of multiplying.
Watt
power • SI Unit
Definition
The watt (symbol: W) is the SI unit of power, defined as the rate of energy transfer equivalent to one joule per second. It measures the amount of energy conversion or transfer that occurs per unit time. In practical terms, it quantifies the rate at which work is done or energy is consumed. The watt is a derived unit in the International System of Units (SI), and it is used extensively in various fields such as electricity, mechanics, and thermodynamics to quantify power output or consumption.
History & Origin
The watt is named after James Watt, a Scottish engineer and inventor whose improvements to the steam engine were fundamental to the changes brought by the Industrial Revolution. The unit was introduced to provide a consistent measure of power, reflecting Watt's contributions to power engineering.
Etymology: Named after James Watt, a pioneer in steam engine development.
Current Use
The watt is widely used across the globe to measure electrical power, mechanical power, and heat transfer. It serves as a fundamental unit in the fields of electrical engineering, physics, and many applied sciences. It is crucial for calculating energy consumption in households, industries, and for determining the power output of engines and machinery.
💡 Fun Facts
- •One watt is equivalent to 1/746th of a horsepower.
- •The watt is the power required to lift a small apple one meter in one second.
- •James Watt's improvements to the steam engine greatly increased its efficiency and power output.
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Horsepower
power • Non-SI
Definition
Horsepower is a unit of measurement for power, which quantifies the rate at which work is done. It is traditionally used to express the power output of engines or motors. One horsepower is defined as the power needed to lift 550 pounds one foot in one second, equivalent to 745.7 watts in the SI system. The term was originally formulated to compare the output of steam engines with the power of draft horses, which were a primary source of industrial power in the 18th century.
History & Origin
The concept of horsepower was introduced in the late 18th century by the Scottish engineer James Watt to help market his steam engines. Watt observed the performance of horses in coal mines and estimated that a horse could turn a mill wheel of a certain size at a certain speed. This observation led him to define one horsepower as the ability to lift 550 pounds one foot in one second. Watt's definition was widely adopted and became a standard measure of engine power.
Etymology: The term 'horsepower' combines 'horse' with 'power', reflecting its origin as a measure of mechanical power compared to the power of a horse.
Current Use
Horsepower remains a common unit of power measurement in the automotive industry, where it is used to specify the power output of engines. It is also used in various other industries, such as those involving pumps, turbines, and electric motors. Despite the widespread adoption of the watt as the SI unit of power, horsepower is still frequently used in non-SI contexts, particularly in the United States and the United Kingdom.
💡 Fun Facts
- •James Watt's first estimate of horsepower was based on the power of a brewery horse.
- •The term 'horsepower' helped sell steam engines, as people could relate to the power of horses.
- •Despite the metric system's dominance, horsepower is still widely used in the automotive industry.
📏 Real-World Examples
🔗 Related Units
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Frequently Asked Questions
How do I convert to ?▼
To convert to , multiply your value by 1. For example, 10 equals 10 .
What is the formula for to conversion?▼
The formula is: = × 1. This conversion factor is based on international standards.
Is this to converter accurate?▼
Yes! MetricConv uses internationally standardized conversion factors from organizations like NIST and ISO. Our calculations support up to 15 decimal places of precision, making it suitable for scientific, engineering, and everyday calculations.
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