Astrolabe, CafeAstrology.com and Psychic Science have free zodiac birth charts on their websites. Users enter their birth parameters to view their zodiac chart, including the date, time and city of their births.
A zodiac birth chart, or natal chart, is a map of the universe with the subject in its center. The chart calculates the subject's personality and potential by using the subject's date, time and location of birth in relation to the universe, which includes the Sun, Moon, planets and other celestial objects. These bodies may be rising, setting, or culminating up or down. Most zodiac birth charts are geocentric, but some astrologers use charts based on the sun.