Devashaa is a free, educational sidereal Vedic astrology (Jyotiṣa) birth-chart calculator and reference. It computes rāśi and the sixteen divisional charts, the twenty-seven nakṣatras, and eight daśā systems using the Swiss Ephemeris, following the classical Sanskrit text Bṛhat Parāśara Horā Śāstra with citations. This is a general-audience educational and reference resource with no advertising, gambling, or commercial content. The interactive chart calculator requires JavaScript.