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`mathcalE = m * gamma * c^2`

Enter a value for all fields

The **E = m•γ•c² **calculator computes the energy from an amount of mass based on the mass (m) and a relativity factor.

**INSTRUCTIONS**: Choose units and enter the following:

**m**- mass of the object**γ**- relativity factor

**Energy from Mass (E):** The calculator returns the energy in Joules. However, this can be automatically converted to compatible units via the pull-down menu.

The E = m•c² equation computes Einsteins Special Relativity formula for the Energy (Joules) that exists in a mass (m in kilograms) at rest as a function of the speed of light (c in meters per second). This equation takes into account the energy of an mass with a relativity factor based on the objects velocity.

E = m•γ•c²

where:

**m**- mass of the object**γ**- relativity factor**c**- speed of light

- E = m•c² (mass/energy equivalent)
- m = E/c² (mass from energy)
- E = m•γ•c² (mass/energy equivalent not at rest)
- E = h•ν (Quantum Energy)
- p = m•γ•v (Relativistic Momentum)
- c (Speed of light)
- γ ≈ 1 + v²/(2c²)
- KE≈m(1+v²/(2c²)-1)c²(Relativistic Kinetic Energy)

A helpful and more detailed explanation can be found at http://www.emc2-explained.info/Emc2/Basics.htm