Birth Chart Calculator

Enter your birth date, time, and place. We calculate the exact position of every planet at your moment of birth using NASA ephemeris data — the same precision professional astrologers rely on. Don't know your birth time? You'll still get your Sun and Moon signs.

Your birth details
As exact as possible — check your birth certificate.
The clock offset from UTC where you were born. Leave blank to estimate from longitude.
Needed for rising sign & houses. Find yours on any map app (tap and hold your birth city).

Frequently Asked Questions

What if I don't know my birth time?

You'll still get your Sun and Moon signs, calculated for noon on your birth date. Your Rising sign and house placements need an exact time — they shift every couple of hours.

What house system do you use?

Placidus — the most widely used system in Western astrology, computed with an iterative Newton-Raphson solution rather than table lookups.

Is my data stored?

Your result is saved so your chart link works, but no email or account is required. Use a nickname if you prefer.

Why is my chart different from other sites?

Small differences usually come down to time zone handling or house system. We compute directly from the JPL DE421 ephemeris — the same data NASA uses for spacecraft navigation.