Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Astronomy
Planetary Mass Calculator
Determine the mass of a star or planet in solar masses from a satellite's orbital period and semi-major axis. Useful for astronomers and students applying Kepler's third law to real or hypothetical systems.
Fill in the required fields to see your result.
Astronomy
Habitable Zone Calculator
Estimate the inner edge of a star's habitable zone in AU based on its luminosity relative to the Sun. Helps astronomers and enthusiasts identify where liquid water could exist on a planet's surface.
Fill in the required fields to see your result.
Key differences
| Planetary Mass Calculator | Habitable Zone Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 2 | 1 |
| Result | Central Mass (M☉) | Inner Habitable Zone (AU) |
| What it does | Determine the mass of a star or planet in solar masses from a satellite's orbital period and semi-major axis. Useful for astronomers and students applying Kepler's third law to real or hypothetical systems. | Estimate the inner edge of a star's habitable zone in AU based on its luminosity relative to the Sun. Helps astronomers and enthusiasts identify where liquid water could exist on a planet's surface. |