Free calculators

Big Three calculator

FreeNo accountReal astronomy
I don't know my birth time
Birth place

Your birth details are used for this calculation only and are not saved.

This is one piece of your chart

The full natal chart shows all ten planets, the twelve houses and how they speak to each other.

See your natal chart

The Big Three are the three placements most often used to describe a chart at a glance: the Sun, the Moon and the ascendant. The Sun needs only a date, the Moon is more precise with a time, and the ascendant requires an exact birth time and place. This calculator computes all three from real astronomical data.