Mass-Energy Calculator
Calculate energy from mass using Einstein's famous equation E = mc².
Energy (J)
89,875,517,873,681,760 J
Energy (J) vs Mass
Formula
## Mass-Energy Equivalence Einstein's equation reveals that mass and energy are interchangeable. ### Formula **E = mc²** where c = 299,792,458 m/s is the speed of light. A tiny amount of mass corresponds to an enormous amount of energy. This is the principle behind nuclear power and nuclear weapons.
Exemplo Resolvido
1 kg of matter fully converted to energy.
- 01E = mc²
- 02E = 1 * (2.998e8)²
- 03E = 8.988e16 J
- 04E = 2.497e10 kWh
- 05That is about 21.5 kilotons of TNT equivalent.
Perguntas Frequentes
Can mass really be converted to energy?
Yes. In nuclear reactions, a small fraction of mass is converted to energy. In matter-antimatter annihilation, 100% of mass becomes energy.
How much energy is in 1 gram of matter?
About 9 x 10^13 joules, equivalent to roughly 21.5 kilotons of TNT or the Hiroshima bomb yield.
Is E=mc² used in everyday life?
Yes. Nuclear power plants convert tiny amounts of mass to energy (via nuclear fission) to generate electricity. PET scans use positron-electron annihilation.
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