Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Astronomy
Lunar Phase Calculator
Calculate the Moon's current phase and illumination percentage for any calendar date. Useful for photographers, gardeners, and astronomers planning around the lunar cycle.
Fill in the required fields to see your result.
Astronomy
Angular Size Calculator
Calculate how large a celestial object appears in the sky given its physical diameter and distance. Perfect for comparing the apparent sizes of planets, moons, nebulae, and galaxies.
Fill in the required fields to see your result.
Key differences
| Lunar Phase Calculator | Angular Size Calculator | |
|---|---|---|
| Category | Astronomy | Astronomy |
| Inputs required | 3 | 2 |
| Result | Moon Illumination (%) | Angular Size (arcsec) |
| What it does | Calculate the Moon's current phase and illumination percentage for any calendar date. Useful for photographers, gardeners, and astronomers planning around the lunar cycle. | Calculate how large a celestial object appears in the sky given its physical diameter and distance. Perfect for comparing the apparent sizes of planets, moons, nebulae, and galaxies. |