About Natal Chart Calculator

This site exists for one job — a natal chart calculator that gives a clear answer quickly and shows how it was reached.

Testing before every update

Every release of the natal chart calculator is checked by an automated test suite of 116 checks in a real browser — normal values, edge cases and invalid input — and on desktop and phone screen sizes before it goes live.

What the explanations rely on

The formulas and reference values in the guides follow published standards and primary sources, linked where they are used: ssd.jpl.nasa.gov.

How we write

Pages are written and maintained by the site's editorial team. We aim to answer the question people actually ask, show worked examples with real numbers, and say plainly where a calculator cannot replace professional advice. Nothing on this site is sponsored content.

Keeping it current

First published October 8, 2026; last updated October 12, 2026. If you spot an error or a case the tool handles badly, please tell us through the contact page — corrections are reviewed and published in the next update.

How the site is paid for

Advertising keeps the site free. Ads are kept separate from results and do not influence what the tool shows.

— Natal Chart Calculator editorial team