Birth Chart.
Precise birth chart powered by Swiss Ephemeris. 10 planets, 5 house systems, aspects and interpretation. 100% local.
A birth chart calculator using the same library the pros use (Swiss Ephemeris). Drop in your date, time and place of birth and get the full wheel with planets, houses, aspects, and a curated interpretation in Spanish and English. Everything runs in your browser — your data never hits a server.
- Swiss Ephemeris (sub-arcsecond precision)
- 10 traditional planets + lunar nodes + Chiron + Lilith (togglable)
- 5 house systems: Placidus, Koch, Whole Sign, Equal House, Porphyry
- SVG wheel using astro.com convention (Asc at 9, synced hover)
- Major aspects with orbs and cross-matrix
- Static interpretation in en+es (no LLM, no fake mysticism)
- Save up to 20 charts in your browser (localStorage)
- Export the wheel as PNG or copy the summary as text
- 01Get your own chart without paying an online astrologer
- 02Compare your chart with your partner's or a friend's
- 03Learn astrology by reading your own chart + included guides
- 04Embed the calculator at the end of every SEO guide
- 05Curiosity: see where the planets fall today
How accurate is it?
We use Swiss Ephemeris — the same library behind astro.com, AstroSeek and nearly every pro app. Sub-arcsecond precision for millennia. If you don't know the exact birth time, tick the checkbox: the chart is calculated at 12:00 but the ASC and houses are flagged as unreliable.
Does my data hit a server?
No. The calculation runs 100% in your browser via WASM. Date, time and place never leave your device. Saved charts live in localStorage — no sync, no account.
Does it predict the future?
No. A birth chart is a symbolic map of the sky at your moment of birth. It gives you a frame for reflection, not a prediction. The interpretation is static (written and reviewed by humans), not generated by AI at runtime.
Which house system should I use?
Placidus by default (most common in western astrology). Whole Sign is simpler and increasingly popular. If unsure, leave the default — the planets don't change, only the house boundaries do.