Convert between different energy units including joules, calories, kilowatt-hours, BTUs, electron volts, and more. Perfect for physics, engineering, chemistry, and everyday energy calculations.
International System of Units (SI) measurements
Traditional British and American measurements
Scientific and technical measurements
Input any energy value in the "From" field. Our converter accepts decimal numbers and scientific notation.
Choose your source unit (e.g., kcal) and target unit (e.g., kJ) from our comprehensive unit selection.
View the converted energy value in real-time. Copy results, explore common conversions, or check conversion history.
Our energy converter uses precise conversion factors and maintains accuracy up to 8 decimal places. All conversions are based on internationally recognized standards.
Yes, our converter supports negative values for applications like relative energy measurements, potential energy differences, or scientific calculations.
Our converter can handle energy values from -1 trillion to 1 quadrillion units, covering everything from subatomic particle energies to astrophysical energy scales.
Enable "Show scientific notation" in preferences for very large or small values. You can also input values like 1e6 for 1,000,000.
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