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E = mc² Calculator

Calculate energy from mass using Einstein's equation: E = m × c². c = 3×10⁸ m/s. 1 kg of mass = 9×10¹⁶ J.

Input
Result
9.0000e+13
Energy (J)
90.00
(TJ)

E = mc² = 0.001 × (3×10⁸)² = 9.0000e+13 J

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