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Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Schwarzschild Radius Calculator
Compute the Schwarzschild radius — the event horizon size of a non-rotating black hole — from its mass via r_s = 2GM/c². The defining length scale of black holes, equal to about 3 km per solar mass.
Fill in the required fields to see your result.
Astronomy
Escape Velocity Calculator
Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained.
Fill in the required fields to see your result.
Key differences
| Schwarzschild Radius Calculator | Escape Velocity Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 1 | 2 |
| Result | Schwarzschild Radius (km) | Escape Velocity (km/s) |
| What it does | Compute the Schwarzschild radius — the event horizon size of a non-rotating black hole — from its mass via r_s = 2GM/c². The defining length scale of black holes, equal to about 3 km per solar mass. | Find the minimum speed an object must reach to escape a celestial body's gravity without further propulsion. Essential for mission planning, planetary science, and understanding why some atmospheres are retained. |