Energy Converter
Convert between Joule, kJ, MJ, Wh/kWh, cal/kcal, eV, BTU, therm (US), and ft·lbf. One-column, light theme, keyboard-friendly.
Results
Enter a value and choose units, then press Convert.
All Units
What Is an Energy Converter Tool?
An online energy converter tool allows users to quickly convert between different energy units, such as Joules (J), Kilojoules (kJ), Megajoules (MJ), Kilowatt-hours (kWh), Calories (cal), British Thermal Units (BTU), and more. This tool is especially useful for scientists, engineers, students, and professionals who deal with multiple energy measurement systems.
How to Use the Online Energy Converter Tool
Using this tool is simple and intuitive. It’s designed with a clean layout, light theme, and easy-to-read interface for fast conversions.
- Enter Your Value – Input any positive or negative number, or use scientific notation like “1e6.”
- Select From Unit – Choose the unit you want to convert from, such as kilowatt-hour (kWh).
- Select To Unit – Pick the desired output unit, for example, megajoule (MJ).
- Click Convert – Instantly view the result below. You can also copy the result or download it as a CSV or JSON file.
Common Energy Units Explained
- Joule (J): The base SI unit of energy.
- Kilojoule (kJ): Equal to 1,000 joules. Commonly used in nutrition and physics.
- Megajoule (MJ): Equivalent to one million joules, often used in fuel energy measurements.
- Kilowatt-hour (kWh): Commonly used to measure electrical energy consumption.
- Calorie (cal): Represents the amount of energy required to raise the temperature of one gram of water by one degree Celsius.
- BTU (British Thermal Unit): Measures the amount of heat energy; used in heating and cooling systems.
Benefits of Using an Online Energy Converter
- Fast, reliable conversions
- Covers over ten major energy units
- Supports scientific notation
- Keyboard shortcuts for quick actions
- Option to swap units instantly
Why Choose This Tool?
Unlike manual conversions, this energy converter tool eliminates the need for memorizing formulas or constants. It’s lightweight, responsive, and designed for both desktop and mobile users.
FAQs
Divide the energy in joules by 3.6 million (3.6 × 10⁶).
Yes, the tool supports scientific notation and high precision, suitable for technical and academic work.
It includes major units like Joule, kJ, MJ, Wh, kWh, cal, kcal, BTU, therm, and ft·lbf.
Yes, it’s completely free and requires no registration or download.
Yes, you can copy, export as CSV, or download results in JSON format.
Conclusion
The online energy converter tool is a must-have for anyone dealing with energy units regularly. Whether you’re a student, researcher, or engineer, it provides quick and accurate conversions in a clean and user-friendly format. Try it now and make your energy calculations effortless.
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