Space Tools

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Explore black hole physics and cosmic distances with interactive calculators.

Event Horizon Radius Calculator

Event Horizon Radius Calculator

Estimate Schwarzschild radius from black hole mass.

Radius: —

Light-Speed Travel Time Calculator

Light-Speed Travel Time Calculator

At light speed: —

Example: Sagittarius A* is ~26,000 light-years away.

Gravity & Time Dilation (Educational)

Gravity & Time Dilation (Educational)



Escape velocity: —

Time dilation factor (approx): —

If r ≤ Rs, you’re at/inside the event horizon (factor not defined).


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