18 free calculators — birth charts, nakshatra, dasha, panchang and more. Accurate astronomy, Sinhala & English, 100% in your browser.
Every tool on this page computes real planetary positions with an arc-minute-accuracy ephemeris running entirely in your browser — no server, no signup, no charge. The set covers Western technique (natal wheels, transits, synastry, midpoints, returns) and the Vedic/Sri Lankan tradition (කේන්දර සටහන්, නැකත්, විම්ශෝත්තරී මහ දශා, ලිත/පංචාංග, ලග්න) using the Lahiri ayanamsa, plus moon phases and poya days, planetary hours, eclipses, retrogrades, numerology and the Chinese zodiac. Sri Lanka's historical time-zone changes are handled automatically for accurate older birth charts, and everything is available in both Sinhala and English.
Your data stays private. All calculations happen locally in your browser — nothing is sent to any server.
Disclaimer: These tools are for educational purposes only. Although the calculations are performed carefully using established astronomical algorithms, 100% accuracy is not guaranteed. For horoscopes, auspicious times, or important life decisions, please consult a professional astrologer.