Free birth chart. The sky speaks of you.
Your zodiac sign is only the Sun. The Moon, your rising sign and the other planets tell the rest: calculate your birth chart from the exact sky of your birth.
Calculated to the arcminute, checked against NASA JPL ephemerides.
Free, without an account · Your data stays with you.
The sky right now · explore the positions →Astraluno is a free birth chart calculator that explains your Sun, Moon, rising sign, planets and aspects. Your chart is calculated in your browser using a documented method: birth date and time stay on your device.
Three places to begin.
Fictitious example, with invented birth data: Alex
Your chart, one placement at a time
A map to read, not a code to crack.
Choose a planet. Find its sign, its area of life and its connections to the rest of the chart. Every reading shows where it comes from.
See an example →Alex · Fictitious example, with invented birth data
Sun in Taurus
26°21′ · House 9 · Whole Sign
Consistency is a source of pride. With the Sun in Taurus, you tend to recognize yourself in what you have cultivated over time: a skill, a familiar place, a distinct preference. Sensuality and stubbornness belong to the same wish for something tangible.
Three steps. Then, explore.
01
Your date
Day, month and year. A display name, if you want one.
02
Your city
Choose the place with its region and country. We use its historical time zone.
03
Your time
Exact, approximate or unknown. Your result keeps that uncertainty visible.
Precision, without mystery
Symbols are interpreted. Calculations are checked.
310 positions compared with JPL Horizons. Largest measured angular error: 0.3407 arcminutes. These measurements cover a finite sample of dates.
Tropical zodiac · Whole Sign houses · IANA 2026e
Start with your question.
Common questions
Why are my houses different from those on other sites?
Astraluno uses Whole Sign houses; many sites use Placidus. Both are traditional methods. Signs and planets do not change.
How accurate is the calculation?
Planet positions were checked against NASA JPL Horizons: a maximum gap of 0.34 arcminutes over 310 positions. The Ascendant was checked on 68 cases. We use historical time zones with daylight saving rules.
Is Astraluno free?
Yes. The calculator and all readings are free, without an account or payment card.
Can I calculate a chart without my birth time?
Yes. We check the full local day and show possible signs. Without a time, the rising sign and houses are unavailable.
Are birth details sent to the server?
No. Date and time are processed in the browser. The server receives the city search query and the request for the time-zone file.