Almanac & sky · NUMORA

Birthday Horoscope Calculator

Birth date → Sun sign from longitude, then today’s transit copy.

How to use

The Sun’s longitude that day. Cusps may disagree with a month-day table by a day.

Formula

FAQ

Is this Birthday Horoscope calculator accurate?

The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.

Do I need an account?

No. Calculations run in your browser. Recents can stay on this device.

What inputs do I need?

The Sun’s longitude that day. Cusps may disagree with a month-day table by a day.

Related calculators

• Yarrow Stalk calculatorYarrow probabilities from the Great Treatise, with the 1/16 shown in the result.
• Liuyao Najia calculatorShi/Ying, six kin, six spirits, empty branches.
• Hexagram Lookup calculatorKing Wen 1–64: judgement, lines, nuclear/opposite/reverse.
• Hexagram Relations calculatorKing Wen number → nuclear / opposite / reversed.
• Time Hexagram calculatorYear branch, month, day, hour modulo → hexagram. Plum-blossom time, its own page.
• Cast Compare calculatorSame date and question, two probability streams side by side.
• Daily Horoscope calculatorMoney first, then work and love. Today’s peak and the thing to watch are pulled out — not flattened.
• Today Horoscope Board calculatorSee who leads on money and the overall score, then open a sign for the full copy.