Free Cosmobiology Midpoint Chart
This tool reads your chart the way German astrologer Reinhold Ebertin's cosmobiology does: primarily through planetary midpoints plotted on a 90-degree dial, rather than through signs and houses the way most Western astrology works.How it works ↓
Fill in the details above and compute to see your result here.
Cosmobiology, developed by Reinhold Ebertin, reads a chart primarily through planetary midpoints on the 90° dial rather than through signs and houses. This tool computes your full midpoint tree using the same dial-and-orb method Ebertin's school uses.
Midpoints first, signs and houses second
Cosmobiology, developed by Reinhold Ebertin in the mid-20th century, treats planetary midpoints on the 90-degree dial as the primary chart-reading tool rather than a supplement to signs and houses. Where most Western astrology starts with placements and aspects, cosmobiology starts by building out the full midpoint tree and reading combinations from there.
This tool computes that full midpoint tree using the same dial-and-orb method Ebertin's school uses, then presents it through his interpretive framing.
Ebertin's emphasis vs. Uranian astrology
Cosmobiology and 90-degree-dial's Uranian/Hamburg School tradition use the identical dial and identical midpoint-and-orb math, the difference is in interpretive emphasis, not calculation. Ebertin's cosmobiology leans toward psychological and physiological readings of midpoint combinations. Uranian astrology, by contrast, adds a set of hypothetical transneptunian points that cosmobiology does not use.
If you're after those transneptunian points or the Uranian tradition specifically, 90-degree-dial is the better fit; this tool sticks to Ebertin's method.
Same numbers as the other two midpoint tools
This tool, midpoint-calculator, and 90-degree-dial all compute the same midpoints and the same hits, nothing about the underlying math changes here. Midpoint-calculator states the results in plain, school-agnostic language with no dial visualization; 90-degree-dial applies the Uranian framing and transneptunian points. This tool applies Ebertin's cosmobiology lens to that identical dataset.
Frequently Asked Questions
Do I need to know Ebertin's system to use this?
No, the tool computes the same midpoint tree either way. Ebertin's cosmobiology just supplies the psychological/physiological interpretive framing applied to the result.
Is cosmobiology a completely different calculation from the 90-degree dial?
No, same dial, same midpoint-and-orb math. The difference is interpretive school: cosmobiology skips the transneptunian points Uranian astrology adds and leans toward psychological/physiological readings instead.