Choose a tool for a chart, a relationship comparison or numerology. The guide below helps you decide which information you need.
Which tool should I use?
Sun-sign compatibility
Choose two Sun signs for love, friendship or working together. No birth date, time or place is needed.
All four tools are listed below. Chart tools accept an unknown birth time; rising signs and houses need a time, and degree-based chart comparisons need both times.
Birth chart compatibility
Compare planetary placements, inter-chart aspects and two chart wheels.
You need: both birth dates and places. Enter the recorded times when available. Unknown times show possible signs; exact aspects require both times.
Your birth chart
Explore your Sun, Moon, rising sign, planetary placements and whole-sign houses. Select planets on the wheel and download placements.
You need: your birth date and place. A recorded time adds your rising sign and houses. An unknown time shows possible planetary signs across the date.
Sun-sign compatibility
Explore themes for love, friendship or working together, then share a comparison link.
You need: two Sun signs. This comparison uses sign relationships, elements and modes.
Numerology
Calculate life path, birthday and personal year numbers, inspect the steps and adjust the master-number rule.
You need: your birth date. A name is optional for the expression number. No birth time or place is needed.
The calculators process birth details in your browser. Moving between tools does not transfer your entries. Site-wide cookies and analytics are covered by the privacy policy. Interpretations offer symbolic prompts for reflection.
For explanations of chart terminology, follow Learn Astrology. The FAQ covers using Cosmosnote and contacting us.
