Explicitly condemned in Scripture — Isaiah 47:13-14, Deuteronomy 18:10-12. Christians consulting horoscopes or birth charts treats created things as oracles — spiritual malpractice. 15/100 Avoid.
The Bible addresses astrology directly and consistently. Isaiah 47:13-14: "All the counsel you have received has only worn you out! Let your astrologers come forward... Surely they are like stubble; the fire will burn them up." Deuteronomy 18:10-12 lists "interprets omens" among the detestable practices God prohibits. Daniel 2:27-28 contrasts the inability of "magicians, enchanters, sorcerers and astrologers" with God's ability to reveal mysteries — making clear astrology represents a false alternative to seeking God.
Many media and lifestyle questions are disputable matters (Romans 14) where Christians can have different convictions. Astrology is not in this category. Scripture does not give Christians freedom to consult astrology, horoscopes, or birth charts for guidance — this is specifically and repeatedly prohibited. The reason: it treats the created order as a source of revelation rather than the Creator himself. This is the idolatry pattern Romans 1:25 describes — worshipping and serving the creature rather than the Creator.
Astrology has become mainstream in contemporary culture — horoscopes appear in mainstream media and astrology-themed content is ubiquitous on social media. The cultural normalization does not change the biblical assessment. Christians who have been casual consumers of astrology content should know this is not a gray area. See our meditation guide for the distinction between Christian spiritual practices and New Age alternatives.
For a thorough biblical overview: GotQuestions on astrology.
Questions about sin fall into two categories: things explicitly called sin in Scripture, and disputable matters (Romans 14-15) where Christians with different convictions should respect each other's consciences. Even when something isn't explicitly sinful: Does this practice reflect Christ's lordship over all of life (Colossians 3:17)? Is it beneficial — not just permissible? (1 Corinthians 10:23). Score: 15/100 Avoid.
See our Is It a Sin? hub. GotQuestions and the Gospel Coalition provide thorough evangelical analysis.