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E equals M C squared

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Relativity index
E equals M C squared diagram
calc
The famous equation E=MC², which is the reult of the development of relativity in the early 20th century, is solved for either mass or energy.
Mass
Energy

Mass
Energy
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notes
Simply enter either a mass or an energy in the relevant blue box (choosing convenient units from the menu), and the orange output box will display the conversion (again, in units of your choice).
You will find, for example, that the eruption of Krakatoa released the same energy as is contained in ~9 kg of matter, and that 1 mg of matter is equal to the chemical energy of almost 15 barrels of oil!