Schwarzschild Radius Calculator - Free, Instant, In Your Browser
Enter a mass in kilograms to calculate the radius it would need to be compressed to in order to become a black hole.
How to use Schwarzschild Radius Calculator
- 1Paste your text or data into the input box above.
- 2Schwarzschild Radius Calculator runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
r = 2GM/c², where G is the gravitational constant, M is mass, and c is the speed of light. Earth's mass gives about 8.87mm; the Sun's gives about 3km.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.