Schwarzschild Radius (Black Hole) Calculator
Event horizon radius, surface gravity and Hawking temperature of a non-rotating black hole.
How to use the Schwarzschild Radius
- Enter or select: Mass.
- The results (Schwarzschild radius, Hawking temperature, Evaporation time, Mean density inside horizon) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- r_s = 2GM / c²
- T_H = ħc³ / (8πGMk_B)