Energy Converter

What is Energy?

Energy is the capacity to do work or produce heat. It appears in many forms such as electrical, thermal, chemical, and mechanical energy.

The SI unit of energy is the Joule (J).

 

 Why Use an Energy Converter?

• Convert food energy (calories ↔ kilojoules).
• Compare electricity usage (kWh ↔ Joules).
• Useful for physics, chemistry, and engineering students.
• Practical in fitness, diet, and nutrition tracking.

 

 Common Use Cases

• Electricity bills (kWh ↔ Joules).
• Cooking and nutrition (kcal ↔ kJ).
• Physics and chemistry labs (J ↔ eV).
• Heating & cooling systems (BTU ↔ Joules).

 

 How to Use the Energy Converter

1. Enter your energy value.

2. Select the unit (J, kcal, kWh, BTU, etc.).

3. Get instant conversions to all supported units.

 

 Supported Units

• Joule (J)
• Kilojoule (kJ) = 1,000 J
• Calorie (cal) = 4.184 J
• Kilocalorie (kcal) = 1,000 cal
• Kilowatt-hour (kWh) = 3.6 × 10⁶ J
• Electronvolt (eV) = 1.602 × 10⁻¹⁹ J
• British Thermal Unit (BTU) = 1,055 J
• Therm (US) = 105.5 MJ

 

 Example Conversions

• 1 kWh = 3.6 million J
• 1 kcal = 4.184 kJ
• 1 BTU = 252 cal
• 1 eV = 1.602 × 10⁻¹⁹ J
• 500 J = 0.12 kcal

 

 Who Uses This Tool?

• Students & Teachers – For science projects and homework.
• Engineers – Energy systems, batteries, and power grids.
• Nutritionists & Fitness Enthusiasts – Converting calories and kilojoules.
• Homeowners – Understanding electricity bills.

 

 FAQs

1. What is the SI unit of energy?

The SI unit of energy is the Joule (J).

2. How do I convert kcal to kJ?

1 kcal = 4.184 kJ.

3. Why is energy measured in kWh for electricity?

Because households and industries consume large amounts of energy, making kWh more practical than Joules.

4. Is food energy the same as calories?

Yes – in nutrition, “calories” usually mean kilocalories (kcal).

5. Is this Energy Converter free?

Yes – 100% free and online.

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