Energy Unit Conversion Tool
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Operating Instructions
Enter a value in any energy unit, and all other units will be automatically converted. Supports all common energy units from joules to British thermal units.
International Units
Energy unit in the International System of Units
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1 kJ = 1,000 J
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1 MJ = 1,000,000 J
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Imperial Units
1 BTU ≈ 1,055 J
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1 ft·lb ≈ 1.356 J
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Electrical Units
1 W·h = 3,600 J
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1 kW·h = 3,600,000 J
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Thermal Units
1 cal ≈ 4.184 J
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1 kcal = 1,000 cal ≈ 4,184 J
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Atomic Physics Units
1 eV ≈ 1.602 × 10⁻¹⁹ J
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1 keV = 1,000 eV
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