Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Relativity
Relativistic Energy Calculator
Compute the total relativistic energy E = γmc² of a particle from its rest mass and velocity. Reduces to E = mc² at rest and grows without bound as velocity approaches the speed of light.
Fill in the required fields to see your result.
Relativity
Rest Mass Energy Calculator
Calculates the intrinsic energy locked in an object's mass using Einstein's famous E = mc². Use it to see how much energy any given mass theoretically contains.
Fill in the required fields to see your result.
Key differences
| Relativistic Energy Calculator | Rest Mass Energy Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 2 | 1 |
| Result | Total Energy (Joules) | Rest Energy (Joules) |
| What it does | Compute the total relativistic energy E = γmc² of a particle from its rest mass and velocity. Reduces to E = mc² at rest and grows without bound as velocity approaches the speed of light. | Calculates the intrinsic energy locked in an object's mass using Einstein's famous E = mc². Use it to see how much energy any given mass theoretically contains. |