E=mc² (mass-energy)

Calculate E=mc² (mass-energy) instantly with the exact formula and a worked example.

E=mc² (mass-energy)

Mass, kgkg
E = mc²
90,000,000,000,000J
Calculate E=mc² (mass-energy) instantly with the exact formula and a worked example.

More about: E=mc² (mass-energy)

What it calculates

The “E=mc² (mass-energy)” calculator computes E = mc² in J from 1 parameter: mass, kg (kg).

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters Mass, kg = 0.001 kg the result is 90,000,000,000,000 J.

How to use

  1. Enter mass, kg — each field above is adjustable with a slider.
  2. E = mc² (J) is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is E=mc² (mass-energy) calculated?
The E=mc² (mass-energy) calculator computes E = mc² (in J) from mass, kg. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the E=mc² (mass-energy) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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