Hindu
Hindu calculator guides, tutorials and formula breakdowns from the CalcaTools editorial team.
How Tithi (Lunar Day) Is Calculated from Moon–Sun Positions — A Worked Example
How tithi is calculated from Moon–Sun elongation: the 12° rule, the 30 tithi names, why tithi lengths vary, and a worked Lahore example with real numbers.
Shubh Muhurat vs Rahu Kaal: How the Timings Are Actually Derived — A Worked Example
How Rahu Kaal and shubh muhurat timings are derived: the weekday-segment rule, the Abhijit muhurta rule, and a worked Lahore example with real numbers.
How the Kundli Matching Score (Guna Milan) Is Calculated — A Worked 36-Point Example
How kundli matching (guna milan) works: all 8 kootas and the 36-point table explained, plus a fully worked Rohini x Mrigashira example scored step by step.
Nakshatra (Birth Star): How to Find Yours & What It M…
Explanation of nakshatras as one of 27 lunar mansions, how to find your janma nakshatra (birth star), and what the 27 nakshatras influence and how they work.
Choghadiya Explained: Auspicious & Inauspicious Times
Explains Choghadiya: day and night split into eight ~90-minute slots, identifying auspicious slots (Amrit, Shubh, Labh, Char).
Shani Sade Sati: The 3 Phases, Effects and How to Find Yo…
Shani Sade Sati: Saturn's 7.5-year transit over the 12th, 1st and 2nd signs from your Moon, three phases, differences from Shani Dhaiya and how to find dates.
What Is Rahu Kaal and How to Calculate It (With Examples)
Rahu Kaal: the daily inauspicious window of about 90 minutes, how to calculate it from sunrise and sunset using the weekday timing table, with a worked example.
Mangal Dosha (Manglik): Meaning, Affected Houses and Reme…
Mangal Dosha (Manglik) occurs when Mars is in the 1st, 2nd, 4th, 7th, 8th or 12th house; how it is checked, seriousness, cancellations and traditional remedies.
Kundali Matching Explained: Guna Milan and the 36 Gunas
Kundali matching (Guna Milan) scores marriage compatibility out of 36 across 8 kootas, each koota's meaning, reading the score, role of Nadi and Bhakoot dosha.
Kundali Basics: How a Vedic Birth Chart Is Built and What…
Kundali basics: a practical guide to reading your own Vedic birth chart, explaining the twelve houses, nine grahas and the ascendant and chart construction.