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Calcimator

Black Hole Event Horizon Calculator

Calculate Schwarzschild radius, event horizon, ergosphere, Hawking temperature, and black hole parameters.

Inputs

Solar Masses

Results

Schwarzschild Radius

2,954.127 m

Event Horizon Radius

2,954.127 m

Hawking Temperature

0.000000062 K

Hawking Lifetime

20,973,585,980,140,658,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 years

Ergosphere Radius2,954.127 m

Schwarzschild Radius

2,954.127 m

Event Horizon Radius

2,954.127 m

Hawking Temperature

0.000000062 K

Hawking Lifetime

20,973,585,980,140,658,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 years

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Black Hole Mass — Mass of the black hole Accepts values from 0.1 Solar Masses to 1,000,000 Solar Masses (default: 1 Solar Masses).
  3. Spin Parameter — Angular momentum parameter (0 = non-rotating, <1 = rotating) Accepts values from 0 to 0.99 (default: 0).
  4. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  5. Schwarzschild Radius — shown as a numeric value. This is the primary result of this calculator.
  6. Event Horizon Radius — shown as a numeric value. This is the primary result of this calculator.
  7. Hawking Temperature — shown as a numeric value. This is the primary result of this calculator.
  8. Hawking Lifetime — shown as a numeric value. This is the primary result of this calculator.
  9. Ergosphere Radius — shown as a numeric value.
  10. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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Formula

r_s = 2GM/c² (Schwarzschild Radius)

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