Free Astrology Midpoint Calculator
This tool finds every midpoint (the exact halfway point between two planets) in your chart and flags which ones sit close enough to a third planet or angle to count as a "hit", a direct activation of that pair's combined theme.How it works ↓
Calculating your placements…
A midpoint is the exact halfway point between two planets. This calculator finds every midpoint in your chart and checks which ones fall close enough to another planet or angle to form a "hit", the building blocks of cosmobiology and Uranian technique.
What a midpoint hit means
A midpoint is simply the halfway point between any two planets' zodiac positions. This tool calculates every possible midpoint in your chart, then checks each one against every other planet and angle to see whether anything falls within a tight orb, about 1.5 degrees, of it.
When something does, that's a hit: the planet or angle sitting on the midpoint is treated as directly activating the combined meaning of the pair that formed it. Tighter orbs count as stronger hits.
The building block behind two other tools
This same midpoint-and-orb calculation is the foundation underneath both 90-degree-dial and cosmobiology-chart. Those two tools take this exact math and apply it through a specific school's lens: 90-degree-dial folds it onto a 90-degree wheel and frames it in Uranian/Hamburg School terms, and cosmobiology-chart applies Reinhold Ebertin's psychological/physiological interpretive style to it.
This tool is the plain, school-agnostic version, the same hit list, stated as planet pairs and orbs with no dial visualization or interpretive tradition attached.
Choosing between the three
If you want the raw list of midpoint hits without committing to a particular astrological tradition, stay here. If you want to see the hits visualized on a 90-degree dial the way Uranian astrologers do, use 90-degree-dial. If you're specifically interested in Ebertin's cosmobiology method, use cosmobiology-chart. All three return identical numbers underneath.
Frequently Asked Questions
Do I need to pick between this, the 90-degree dial, and cosmobiology?
No, pick whichever framing matches what you're looking for. All three run the same midpoint math and return the same hits; they differ only in vocabulary and visual presentation.
Why 1.5 degrees for the orb?
A tight orb around 1.5 degrees is the standard threshold for a midpoint hit, wider orbs produce far more "hits" but weaker, less reliable ones, so this tool keeps the default narrow.