E=mc² Calculator
Calculate the energy equivalent of a given mass using Einstein's famous equation E = mc², where c is the speed of light. Demonstrates the enormous energy contained in even small amounts of matter.
Inputs
Results
Energy
8.988e+13 J
Energy (kWh)
2.497e+7 kWh
TNT Equiv.
21.5 kt
E=mc² Results
| Parameter | Value |
|---|---|
| Mass | 0.001 kg (1.000000 g) |
| Speed of Light (c) | 299,792,458 m/s |
| c² | 8.987552e+16 m²/s² |
| Energy (J) | 8.987552e+13 J |
| Energy (kWh) | 2.4965e+7 kWh |
| Energy (GWh) | 2.4965e+1 GWh |
| TNT Equivalent (kt) | 21.48 kilotons |
| TNT Equivalent (Mt) | 0.0215 megatons |
| Formula | E = mc² |