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Purnima Date Calculator | Find Purnima Dates for Ritual Planning

A Purnima Date Calculator helps calculate purnima date calculator using Vedic astrology, panchang, calendar, muhurat, Vastu or naming inputs. It gives an instant browser-based result with a transparent method and source notes. Use it for planning and learning, then verify important ritual or marriage decisions with a qualified practitioner.

Last updated: June 2026 · Free · No sign-up required

Results

Enter values above and click Calculate to see your result instantly.

Quick reference

2026 PurnimaWeekdayFestival on it
3 JanSaturdayPaush Purnima — Shakambhari
1 FebSundayMagha Purnima
3 MarTuesdayHolika Dahan eve / Holi
1 MayFridayBuddha Purnima (Vaishakha)
31 MaySundayVat Purnima (Jyeshtha)
29 JulWednesdayGuru Purnima (Ashadha)
28 AugFridayRaksha Bandhan (Shravana)

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For ceremonies, marriage matching and legal decisions, verify with a qualified practitioner and your regional panchang.

Interpretation guide

ResultMeaning
13 dates in a yearLunar months are 29.5 days, so 12–13 full moons fit a solar year
Purnima at sunriseThe vrat/snan day used by calendars — what this tool lists
Purnima Upavas dayWhen the tithi spans two days, the fast can precede the snan day
Month namesEach Purnima names the Purnimanta month that ends on it
Astronomical full moonCan differ by a few hours from the tithi day — both are correct

lightbulb Worked example

Let's say you are using the Purnima Date Calculator. A Purnima Date Calculator helps calculate purnima date calculator using Vedic astrology, panchang, calendar, muhurat, Vastu or naming inputs. It gives an instant browser-based result with a Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Purnima day = civil day whose sunrise carries the 15th (full-moon) tithi and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Purnima day = civil day whose sunrise carries the 15th (full-moon) tithi

The Purnima Date Calculator is built on a well-established calculation method. It uses the formula Purnima day = civil day whose sunrise carries the 15th (full-moon) tithi to turn your inputs into a reliable result. A Purnima Date Calculator helps calculate purnima date calculator using Vedic astrology, panchang, calendar, muhurat, Vastu or naming inputs. It gives an instant browser-based result with a transparent method and source The steps are shown on the page so you can follow the reasoning from input to output.

  1. Enter the year.
  2. The calculator finds the days whose sunrise elongation (Moon − Sun) lies in the 15th tithi arc (168°–180°).
  3. Each match is listed with its weekday — normally 12 or 13 days a year.
  4. Festival names attach by lunar month (Guru Purnima in Ashadha, Sharad Purnima in Ashwin…).

Worked example — 2026 has 13 Purnimas, opening with Paush Purnima on Saturday, 3 January 2026 and including Buddha Purnima on 1 May, Guru Purnima on 29 July and Raksha Bandhan’s Shravana Purnima on 28 August.

Authoritative source: Drik Panchang — Hindu Calendar & Panchang

Frequently asked questions

How many full moons are there in 2026?
There are usually 12 full moons per year, one per lunar month, but roughly every 2–3 years a year contains 13 because the 354-day lunar year occasionally adds a leap month (adhika masa). In 2026, the calendar has 12 Purnima dates, listed by the panchang rule that the full-moon tithi must prevail at sunrise for the civil day to count.
What is special about Purnima?
The full-moon tithi is sacred to Vishnu and the Moon; devotees observe Purnima vrat, take holy-river snan and perform Satyanarayan puja. Several major festivals ride specific Purnimas — Holi, Buddha Purnima, Guru Purnima, Raksha Bandhan, Sharad Purnima and Kartik Purnima.
Why can the “full moon” differ from NASA’s full-moon time?
Astronomical full moon is the instant of exact 180° elongation; the Hindu Purnima day is the civil day whose sunrise falls inside the 15th tithi. If exact fullness occurs late evening, the calendar Purnima can be the next morning’s date — a few hours’ difference, both correct in their own systems.
What is the difference between Purnima vrat day and snan day?
When the tithi starts mid-day, the fasting observance (upavas) is kept on the day the tithi is running at moonrise, while the bath/daan day is the sunrise-tithi day. Panchangs occasionally print them separately; this calculator returns the sunrise-tithi (snan/daan) date.
Which months’ Purnimas matter most?
Ashadha’s Guru Purnima honours teachers; Shravana’s carries Raksha Bandhan; Ashwin’s Sharad Purnima is the kheer-under-moonlight night; Kartik Purnima closes Dev Deepawali; Vaishakha’s is Buddha’s birth anniversary; and Phalguna’s evening hosts Holika Dahan with Holi the next day.
What does the Purnima Date Calculator do?
A Purnima Date Calculator helps calculate purnima date calculator using Vedic astrology, panchang, calendar, muhurat, Vastu or naming inputs. It gives an instant browser-based result with a transparent method and source notes. Use it for planning and. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.
What formula does the Purnima Date Calculator use?
The Purnima Date Calculator applies the standard formula: Purnima day = civil day whose sunrise carries the 15th (full-moon) tithi. The tool walks through each step of the calculation so you can verify the numbers yourself.
Is the Purnima Date Calculator free and private?
Yes — the Purnima Date Calculator. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.
How accurate is the Purnima Date Calculator?
The Purnima Date Calculator applies the standard formula: Purnima day = civil day whose sunrise carries the 15th (full-moon) tithi. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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