Harmonic Charts
Recast your real natal chart at any harmonic — 4th, 5th, 7th, 9th, or a custom number — using the real longitude-multiplication technique harmonic astrology is built on, with the same full chart wheel and aspect detection as your ordinary natal chart applied to the harmonic positions.
A harmonic chart reveals aspect patterns invisible on the plain natal wheel: recasting at the 5th harmonic surfaces every quintile relationship as a conjunction, for instance, making a pattern that's spread across five different exact-degree gaps in the natal chart visually obvious in the harmonic one instead.
Because harmonic charts are a real mathematical transformation (multiplying every longitude by the harmonic number and reducing back to 360°) rather than an approximation, the same harmonic chart can be reliably reproduced by any astrologer using the technique — useful for comparing notes on a specific harmonic's patterns.
The 4th harmonic surfaces square and opposition patterns as conjunctions, the 7th brings out septile relationships tied to fated or compulsive themes, and the 9th (the same math behind the classical Navamsa) surfaces trine and sextile networks — each harmonic has its own traditionally associated theme.
Frequently Asked Questions
What is a harmonic chart?
A chart where every planet's longitude is multiplied by a chosen whole number (the harmonic) and reduced back into the 0-360° zodiac — a technique developed by John Addey to reveal resonances not visible in the natal chart itself.
What does the 5th harmonic chart traditionally show?
Themes of creativity and talent.
What does the 7th harmonic chart traditionally show?
Themes of inspiration, faith, and areas outside direct personal control.
What does the 9th harmonic chart traditionally show?
Themes of completion, fulfillment, and one's ultimate goals — this is also mathematically related to (though computed independently of) the Vedic Navamsa.
Can I pick a harmonic number that isn't a common preset?
Yes — alongside the 4th/5th/7th/9th presets, you can enter any whole number harmonic directly.