What does this calculator do?

A Sun sign calculator uses your birth date and time to determine the Sun’s precise zodiac longitude. Unlike simple date-range lists, an astronomical calculation can resolve births near a sign-change boundary.

This page separates astronomical or arithmetic calculation from interpretation. It reports only values supported by the supplied data and the selected calculation method. Missing information is shown as unavailable rather than replaced with a guessed value.

Results included

• Sun sign
• Exact zodiac degree
• Boundary-day status
• Calculation timestamp
• Supported house placement when a full chart is requested

How to read the technical result

Check the sign or number first, then review exact degrees, houses, aspects, or reduction steps where they apply. A complete result should identify the input data, calculation system and any limitations. These details make the result reproducible and easier to compare with other professional tools.

Accuracy and data limitations

For most dates, the sign is clear without a birth time. Near an ingress, the result may remain uncertain until a time and location are supplied. Names, dates, local times and locations should be entered carefully. A technically correct calculator cannot recover information that was not supplied, and Moodfex does not manufacture missing birth data.