Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Relativity
Relativistic Velocity Addition Calculator
Computes the combined velocity of two objects moving at relativistic speeds, preventing any result from exceeding the speed of light. Use it when simple addition of velocities would violate special relativity.
Fill in the required fields to see your result.
Relativity
Relativistic Escape Velocity Calculator
Calculates the escape velocity from a massive body using a relativistic correction for the Schwarzschild geometry. Useful for neutron stars, white dwarfs, and objects near black hole thresholds.
Fill in the required fields to see your result.
Key differences
| Relativistic Velocity Addition Calculator | Relativistic Escape Velocity Calculator | |
|---|---|---|
| Category | Relativity | Relativity |
| Inputs required | 4 | 2 |
| Result | Relativistic Sum (m/s) | Escape Velocity (fraction of c) |
| What it does | Computes the combined velocity of two objects moving at relativistic speeds, preventing any result from exceeding the speed of light. Use it when simple addition of velocities would violate special relativity. | Calculates the escape velocity from a massive body using a relativistic correction for the Schwarzschild geometry. Useful for neutron stars, white dwarfs, and objects near black hole thresholds. |