Power Converter

Converting power units—like watt, horsepower, or calories per second—can be complex, especially when working across different measurement systems or technical fields. Whether you’re dealing with electrical devices, engines, or HVAC systems, accurate unit conversions are critical. That’s why our online Power Converter tool is designed to deliver fast, precise, and effortless conversions between multiple units of power.

The Power Converter is an easy-to-use online tool designed to simplify complex power unit conversions. Whether you’re an engineer calculating electrical output, a mechanic comparing horsepower ratings, or a student learning about energy transfer, this tool takes the guesswork out of your work. Just enter any power value, and the converter will instantly provide accurate results across all major units—saving time, reducing mistakes, and boosting efficiency in every calculation.

• Watt (W)
• Kilowatt (kW)
• Megawatt (MW)
• Gigawatt (GW)
• Horsepower (hp)
• Metric Horsepower (hp [metric])
• Erg per second
• Calorie per second (cal/s)
• British Thermal Unit per hour (BTU/h)
• Foot-pound per minute (ft⋅lb/min)
• Ton of refrigeration

What is Power?

Power is the rate at which work is done or energy is transferred over time. It plays a crucial role in physics, electrical engineering, mechanical systems, thermal dynamics, and many other industries. The ability to measure and convert power accurately is essential for designing systems, measuring efficiency, and ensuring optimal performance.

The SI unit of power is the Watt (W), which is defined as one joule per second. However, various other units are used depending on context—for example, horsepower in automotive applications, BTU/h in heating and cooling, and kilowatts or megawatts in power generation.

Here’s how some of the commonly used power units relate to one another:

• 1 Kilowatt = 1,000 Watts
• 1 Megawatt = 1,000,000 Watts
• 1 Horsepower ≈ 745.7 Watts
• 1 Metric Horsepower ≈ 735.5 Watts
• 1 Ton of refrigeration ≈ 3,516.85 Watts
• 1 Calorie per second ≈ 4.184 Watts

With our Power Converter, you no longer need to memorize complex formulas or constants. Just enter your value, and the tool takes care of the rest—quickly, accurately, and effortlessly.

What Are the Supported Power Units in Our Power Converter?

Our Power Converter supports a full range of power units used in physics, mechanical engineering, electrical systems, and energy applications. Whether you’re working with small appliances or large-scale industrial systems, this tool allows you to convert between multiple units of power quickly and accurately.

Below is a complete list and explanation of the supported power units available in our tool to ensure you can make accurate and efficient conversions:

1. Watt (W)

Watt is the SI base unit of power. It is defined as one joule per second and represents the rate of energy transfer or conversion. 1 W = 1 J/s.

2. Kilowatt (kW)

Kilowatt is equal to 1,000 watts. It is commonly used to measure the power output of engines and the energy consumption of homes and businesses.

3. Megawatt (MW)

Megawatt equals 1,000,000 watts. It is often used to quantify the output of power plants or the consumption of large facilities.

4. Gigawatt (GW)

Gigawatt equals 1,000,000,000 watts. It is used to describe the output capacity of large power stations or national electrical grids.

5. Horsepower (hp)

Horsepower is a unit of power commonly used for engines and mechanical systems. 1 mechanical horsepower ≈ 745.7 watts.

6. Metric Horsepower (hp-metric)

Metric Horsepower is slightly different from mechanical horsepower and equals approximately 735.5 watts. It is used mainly in Europe and Asia.

7. Erg per second

Erg per second is a unit in the CGS system, equal to 10⁻⁷ watts. It is used in older scientific literature and physics research.

8. Calorie per second (cal/s)

Calorie per second measures the rate of energy transfer in terms of thermal calories. 1 cal/s ≈ 4.184 watts.

9. British Thermal Unit per hour (BTU/h)

BTU per hour is used in heating and cooling systems. 1 BTU/h ≈ 0.293071 watts.

10. Foot-pound per minute (ft·lb/min)

Foot-pound per minute is used in mechanical systems to express work over time. 1 ft·lb/min ≈ 0.022597 watts.

11. Ton of Refrigeration (TR)

Ton of Refrigeration measures cooling capacity. 1 TR = 12,000 BTU/h ≈ 3,516.85 watts. It is widely used in air conditioning and refrigeration.

Power Conversion Formulas

How to Convert Power Units? – Explained with Examples

Converting between different power units is essential in engineering, energy calculations, HVAC, mechanical systems, and appliances. Below, you’ll find the most common power unit conversions explained with formulas and practical examples.

1. How to Convert Watts to Kilowatts?

To convert watts (W) to kilowatts (kW), divide the number of watts by 1,000. Formula: kW = W ÷ 1,000 Example: 5,000 W ÷ 1,000 = 5 kW

2. How to Convert Kilowatts to Megawatts?

To convert kilowatts to megawatts, divide by 1,000. Formula: MW = kW ÷ 1,000 Example: 2,000 kW ÷ 1,000 = 2 MW

3. How to Convert Megawatts to Gigawatts?

To convert megawatts to gigawatts, divide by 1,000. Formula: GW = MW ÷ 1,000 Example: 3,000 MW ÷ 1,000 = 3 GW

4. How to Convert Watts to Horsepower?

To convert watts to horsepower (HP), divide by 745.7. Formula: HP = W ÷ 745.7 Example: 1,491.4 W ÷ 745.7 = 2 HP

5. How to Convert Metric Horsepower to Watts?

To convert metric horsepower to watts, multiply by 735.5. Formula: W = metric HP × 735.5 Example: 3 metric HP × 735.5 = 2,206.5 W

6. How to Convert Ergs per Second to Watts?

To convert erg/s to watts, divide by 10⁷. Formula: W = erg/s ÷ 10,000,000 Example: 50,000,000 erg/s ÷ 10,000,000 = 5 W

7. How to Convert Calories per Second to Watts?

To convert cal/s to watts, multiply by 4.184. Formula: W = cal/s × 4.184 Example: 10 cal/s × 4.184 = 41.84 W

8. How to Convert BTU per Hour to Watts?

To convert BTU/hr to watts, multiply by 0.293071. Formula: W = BTU/hr × 0.293071 Example: 3,412 BTU/hr × 0.293071 = 1,000 W

9. How to Convert Foot-pounds per Minute to Watts?

To convert ft·lb/min to watts, multiply by 0.022597. Formula: W = ft·lb/min × 0.022597 Example: 500 ft·lb/min × 0.022597 = 11.3 W

10. How to Convert Tons of Refrigeration to Watts?

To convert tons of refrigeration to watts, multiply by 3,516.85. Formula: W = tons × 3,516.85 Example: 2 tons × 3,516.85 = 7,033.7 W

How to Use the Power Converter Tool – Step-by-Step Guide

Follow these steps to convert power values easily using our Power Converter tool:

Step 1: Choose Your Input Unit: Select the power unit you want to convert from. Supported units include:

• Watt (W)
• Kilowatt (kW)
• Megawatt (MW)
• Gigawatt (GW)
• Horsepower (HP)
• Metric Horsepower
• Erg per second (erg/s)
• Calorie per second (cal/s)
• British Thermal Unit per hour (BTU/hr)
• Foot-pound per minute (ft·lb/min)
• Ton of refrigeration

Step 2: Enter the Power Value: Input the numerical value in the “Enter Value” field.

Step 3: Select the Output Unit: Choose your desired output unit to instantly view the result.

Step 4: Instant Conversion: The tool automatically converts the entered value into all other supported units—no clicks required.

Frequently Asked Questions – Power Converter

Q1: What is the SI unit of power?
The SI unit of power is the watt (W).

Q2: How many watts are in one kilowatt?
1 kilowatt = 1,000 watts.

Q3: What is the difference between horsepower and metric horsepower?
1 mechanical HP = 745.7 W; 1 metric HP = 735.5 W.

Q4: How many watts are in one BTU/hr?
1 BTU/hr = 0.293071 W.

Q5: Can I convert refrigeration tons to kilowatts?
Yes. 1 ton of refrigeration = 3.51685 kW.

Q6: What is a calorie per second in watts?
1 cal/s = 4.184 W.

Q7: Is this converter tool accurate for engineering use?
Yes, it uses standard formulas and precision suitable for professional applications.

Q8: Is the tool responsive on mobile devices?
Absolutely. It works smoothly on smartphones, tablets, and desktops.

Q9: How many watts are in a gigawatt?
1 GW = 1,000,000,000 W.

Q10: Can I use this for HVAC power conversions?
Yes! It’s perfect for converting refrigeration tons, BTU/hr, and kilowatts.

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Conclusion: Understanding and converting power units is essential in fields like electrical engineering, thermodynamics, and HVAC. Our Power Converter supports a wide variety of units including watt, kilowatt, megawatt, gigawatt, horsepower, metric horsepower, erg per second, calorie per second, BTU per hour, foot-pound per minute, and ton of refrigeration. Whether you’re calculating power output for engines, electrical devices, or heating systems, this tool offers quick, accurate, and hassle-free conversions. Try it now to streamline your power-related calculations.

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