How this calculator works
Enter the values for first value, second value and review the units before calculating.
Formula / method
rₛ = 2GM ÷ c²
Worked example
One solar mass has a Schwarzschild radius of about 2.95 km.
Assumptions and limitations
This is the ideal event-horizon radius for a non-rotating, uncharged Schwarzschild black hole.
It does not describe rotating or charged black holes, accretion disks or what an observer experiences.