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OrbitLab
How small would this mass need to be to become a black hole?
The Schwarzschild radius is the size a mass would need to be compressed to for its escape velocity to exceed the speed of light — inside this radius, not even light can escape, defining a black hole's event horizon.
In principle any mass has a Schwarzschild radius (Earth's is about 9mm), but ordinary matter is nowhere near dense enough to collapse to that size — only the crushing gravity of a collapsing massive star can actually achieve it.
Molar mass of any chemical formula (e.g. H2O, C6H12O6, Ca(OH)2).
OpenPercent composition of an element within a chemical formula.
OpenSimplest whole-number ratio formula from elemental masses or percentages.
OpenPercent yield from actual and theoretical reaction yields.
OpenSchwarzschild radius
2,953.994 m
Default mass shown is one solar mass
What you entered
Rs = 2GM ÷ c²
2 × 6.674e-11 × 1.989e+30 ÷ 2.998e+8²= 2953.9938 mResult
Schwarzschild radius: 2,953.994 m
If this mass were compressed inside a sphere of radius 2,953.99 m, it would become a black hole.