Schwarzschild Radius Calculator
Result
Schwarzschild radius (km)29.5325008
Diameter (km)59.0650016
↗ Space
Calculate the Schwarzschild radius of a non-rotating black hole from its mass.
Formula
Rs ≈ 2.95325 km × Solar masses
- For one solar mass, the Schwarzschild radius is about 2.95325 km.
- The main inputs are Black hole mass. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Schwarzschild Radius
Inputs
- Black hole mass: 10 solar masses
A 10-solar-mass black hole has a Schwarzschild radius of about 29.53 km.
Sample result: Calculating…
Frequently asked questions
What does this calculator estimate?
It calculates the event-horizon radius for an ideal Schwarzschild black hole.
Is this an exact mission-planning tool?
No. It is an educational calculator based on the stated constants and simplified assumptions.
How accurate is the result?
The relation is exact for a non-rotating, uncharged black hole in general relativity; astrophysical black holes can rotate.
What does the Schwarzschild Radius calculate?
Calculate the Schwarzschild radius of a non-rotating black hole from its mass.
Which values should I enter?
Enter Black hole mass using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Rs ≈ 2.95325 km × Solar masses.