Event Horizon Calculator
Calculate event horizon properties of black holes
0 = Schwarzschild, 1 = maximally rotating Kerr
Results
Enter values to calculate
Formulas
Schwarzschild: rs = 2GM/c²
Kerr horizons: r± = rg(1 ± √(1-a²))
Where rg = GM/c² and a is the dimensionless spin parameter.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: University Physics
by Young & Freedman
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.