Physics

E = mc² Calculator

Find the energy equivalent of a mass.

Calculated Output

Energy (J) 89,875,517,873,681.77

Energy (kilotons TNT) 21.481

Formula: E = m · c²

Step-by-Step Breakdown

1. Values used:

2. Mass = 0.001

4. Energy = 89,875,517,873,681.77J

5. Energy = 21.481kilotons TNT

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The math behind it

E = mass × speed of light² (c = 3 × 10⁸ m/s).

1 gram → 8.99 × 10¹³ J (~21.5 kilotons TNT).

Why so much?

c² is a huge multiplier — tiny mass yields immense energy.