Tithi Calculator

This free tithi calculator online tool helps you instantly find the exact Hindu lunar day (tithi), the current paksha, the corresponding deity, and the Moon phase for any date in 2026.

Initializing Advanced Panchang Engine...

Ever tried planning a puja, a shraddha ceremony, or even a simple fast — only to realize you have no clue what today’s tithi is? You’re not alone. Most people either rely on outdated printed panchangams or call up their family priest at the last minute.

That’s exactly why a Tithi Calculator exists. This free online tool helps you instantly find the exact Hindu lunar day (tithi), the current paksha, the corresponding deity, and the Moon phase for any date in 2026. Whether you need a birth tithi calculator, a janam tithi calculator, a thithi finder for ancestral rituals, or a tithi date calculator for festival planning — this one tool handles it all with accuracy.

No guesswork. No confusion. Just enter your date, time, and location — and get your answer.

What is Tithi (Lunar Day)?

A tithi is a lunar day in the Hindu calendar. But it’s not the same as a regular 24-hour day.

Here’s the simple version: a tithi is the time it takes for the longitudinal angle between the Moon and the Sun to increase by 12 degrees. Since the Moon moves faster than the Sun, this angle keeps growing. Every 12-degree jump = one new tithi.

One lunar month consists of 30 tithis — 15 in each half. The start time and duration of each tithi vary. Some last 19 hours. Others stretch past 26 hours. That’s why the tithi at sunrise matters most in Vedic tradition.

Think of it this way: the Sun gives you the solar day. The Moon gives you the tithi. And in Hindu astrology, the Moon’s role is king.

What is Paksha?

Each lunar month is split into two pakshas (fortnights):

Shukla Paksha (Gaura Paksha): The waxing phase — from new moon (Amavasya) to full moon (Purnima). The Moon is brightening. This period is considered auspicious for new beginnings.
Krishna Paksha (Vadhya Paksha): The waning phase — from full moon back to new moon. The Moon is fading. This period suits introspection, ancestral offerings, and spiritual practices.

The Sanskrit word pakṣa literally refers to a fortnight or a “wing.” Together, both pakshas complete one full lunar month. Understanding which paksha you’re in is essential for selecting the right muhurta and planning ceremonies.

How Tithi is Calculated (Astronomical Basis)

Let’s break this down without the jargon.

The Moon moves eastward relative to the Sun.
Every time it moves 12 degrees ahead, a new tithi begins.
The first 12-degree move after the new moon (Amavasya) marks Prathamai — the first tithi of Shukla Paksham.
This cycle continues through 15 tithis until Paurnami (full moon).
Then 15 more tithis count down through Krishna Paksha back to Amavasya.

Since the Moon’s orbit around the Earth isn’t perfectly circular, each tithi’s duration varies — roughly between 19 to 26 hours. That’s why you can’t just look at a wall calendar. You need precise calculations based on your location, date, and time.

This is exactly what a tithi calculator does. It uses astronomical data — the exact positions of the Sun and Moon — to pinpoint the prevailing tithi at any given moment. According to Drik Panchang, one of the most trusted Hindu calendar references online, tithi accuracy depends heavily on geographic coordinates because the Moon’s position shifts relative to your location.

Tithi Names in Tamil and Sanskrit

Each of the 30 tithis carries a unique name. Here they are in both Tamil and Sanskrit:

#	Tamil Name	Sanskrit Name
1	Pirathamai	Pratipada
2	Thuvithiyai	Dwitiya
3	Thiruthiyai	Tritiya
4	Chathurthi	Chaturthi
5	Panjchami	Panchami
6	Sashdi	Shashthi
7	Sapthami	Saptami
8	Ashdami	Ashtami
9	Navami	Navami
10	Thasami	Dashami
11	Eagaathasi	Ekadashi
12	Thuvaathasi	Dwadashi
13	Thirayoathasi	Trayodashi
14	Chathurthasi	Chaturdashi
15	Paurnami / Amaavaasai	Purnima / Amavasya

Each tithi is also dedicated to a specific deity (Thithi Devathai / Deivam). Knowing your tithi helps you honor the appropriate celestial force through worship.

Use the Free Online Tithi Calculator

Here’s how to use our free Tithi Calculator:

Enter your date — pick any date in 2026 (or any year).
Enter the time — the more precise, the better.
Select your location/city — the tool adjusts for your timezone and coordinates automatically.
Click submit — your result appears instantly.

What you’ll get:

The exact tithi (lunar day) and its name
The current paksha (Shukla or Krishna)
The Moon phase
The corresponding deity (Thithi Devathai)
Related nakshatra and other panchang details

This tool works like a digital Tamil astrological almanac. Whether you need it for a vrat, ekadashi observance, festival date, or birth chart analysis, it delivers accurate results every time.

Pro tip: Bookmark the calculators page — it’s got a full suite of Vedic and Western astrology tools you’ll keep coming back to.

Significance of Tithi in Tamil Astrology

In Tamil astrology, the panchang has five limbs: Varam (weekday), Nakshatram (star), Thithi (lunar day), Yogam, and Karanam. Tithi is one of the most important among these.

Here’s why it matters:

Daily life: Selecting Nalla Neram (good time) and Muhurtham for events.
Special occasions: Weddings, housewarming, business launches — all depend on the right tithi.
Personal worship: Your birth tithi determines your personal deity.
Ancestral offerings: Pithur Karmam must happen on the correct tithi.

I’ve seen families postpone weddings by weeks just to land on the right tithi-nakshatra combination. It’s that significant. If you’re curious about how the Moon sign influences your emotional world alongside tithi, that’s another layer worth exploring.

Tithi and Its Role in Vedic Astrology

Beyond Tamil traditions, tithi plays a powerful role across all Vedic astrology systems. Your birth tithi (janam tithi) can influence your personality, life path, and spiritual tendencies.

According to the Institute of Vedic Astrology, the tithi at the time of birth is used as the basis for identifying auspicious and inauspicious muhurats throughout a person’s life. It’s an element that shouldn’t be overlooked.

Traditional Indian festivals — Diwali, Holi, Navaratri — are all tithi-based, not solar-date-based. That’s why their Gregorian dates shift every year.

Auspicious and Inauspicious Tithis by Weekday

Not every tithi works the same way on every day. Certain combinations of tithi and weekday are considered either propitious or unfavorable.

Auspicious Tithis

Weekday	Favorable Tithi
Sunday	Sapthami
Monday	Thuvithiyai
Tuesday	Sashdi
Wednesday	Ashdami
Thursday	Eagaathasi (Ekadashi)
Friday	Thirayoathasi
Saturday	Chathurthasi

Inauspicious Tithis

Weekday	Unfavorable Tithi
Sunday	Ashdami
Monday	Navami
Tuesday	Sashdi
Wednesday	Thiruthiyai
Thursday	Eagaathasi
Friday	Thirayoathasi
Saturday	Chathurthasi

Wait — some tithis appear in both lists? Yes. Context matters. The specific paksha (waxing vs. waning) and the nakshatra alignment shift whether a tithi leans favorable or not. This is why a detailed panchang-based analysis beats guesswork every time.

Personal Worship and Your Birth Tithi

Here’s something most people miss: the tithi you were born on determines your personal deity (Thithi Deivam).

Each of the 15 tithis has a dedicated celestial force. When you worship the deity connected to your birth tithi, the results — spiritually and practically — tend to be stronger.

To find yours:

Use the birthday tithi calculator — enter your birth date, time, and place.
Note your tithi and its corresponding deity.
Honor that deity through regular prayer, especially on days when that tithi recurs.

This is one of the simplest yet most overlooked practices in Vedic worship. Pair this with your Sun, Moon, and Rising sign for a more complete spiritual picture.

How to Observe Your Vedic Birthday

Your Vedic birthday isn’t your Gregorian birthday. It’s the day each year when the same tithi from your birth recurs in the same lunar month. This is called Tithi Pravesh.

Here’s how to observe it meaningfully:

Take a calm morning bath before sunrise if possible.
Meditate or chant for a few quiet minutes.
Light a lamp and offer gratitude.
Spend time in prayer or peaceful devotional activity.
Avoid hectic energy — this moment is about spiritual reflection, not parties.

Observing your tithi pravesh can enhance positive results for the year ahead and soften challenging planetary influences. It’s a true personal lunar new year — and it’s deeply meaningful when done with intention.

Tithi for Ancestral Offerings (Pithur Karmam)

This is where the இறந்தவர்களுக்கு திதி calculator (death tithi calculator) becomes essential.

In Hindu tradition, Pithur Karmam (ancestral offerings / Shraddha) must be performed on the exact tithi prevailing at the time of a family member’s death — not the Gregorian date.

How to find the correct shraddha date:

Enter the exact date, time, and place of death into the tithi calculator.
The tool determines the prevailing tithi at that moment.
Each year, when that same tithi occurs in the Tamil calendar, you perform the annual ceremony.

Special offerings include the deceased person’s favorite food, specially prepared and offered with prayers. During Pitru Paksha (Mahalaya period) — a 15-day window — Hindus pay homage to all ancestors. The last day, Sarvapitru Amavasya, is the most significant, allowing families who missed specific dates to perform rituals for all ancestors on a single day.

Getting this right matters. It’s about honoring the people who came before you — and the Tithi Calculator makes sure you never get the date wrong.

Frequently Asked Questions

What is a Tithi?

A tithi is a lunar day — the time taken for the Moon-Sun longitudinal angle to increase by 12 degrees. One lunar month has 30 tithis.

How is Tithi calculated?

Tithi is calculated based on the Moon's eastward movement relative to the Sun. Every 12-degree increase marks a new tithi. Duration varies between roughly 19–26 hours.

What is the Tithi Calculator for?

It's a free online tool that accurately calculates the prevailing tithi for any date, time, and location. Use it for festival planning, birth tithi lookup, or shraddha date finding.

What are the Tamil names for Tithis?

Pirathamai, Thuvithiyai, Thiruthiyai, Chathurthi, Panjchami, Sashdi, Sapthami, Ashdami, Navami, Thasami, Eagaathasi, Thuvaathasi, Thirayoathasi, Chathurthasi, Paurnami, and Amaavaasai.

What role does Tithi play in Tamil astrology?

Tithi is one of the five elements of the panchang. It's essential for selecting muhurtham, performing worship, and planning ceremonies.

How is Tithi related to worship?

Your birth tithi determines your personal deity (Thithi Deivam). Worshipping this deity regularly is considered highly favorable.

What is the significance of Tithi for offerings to the deceased?

Shraddha ceremonies must be performed on the same tithi that prevailed at the time of death — not the Gregorian anniversary. The tithi calculator finds this date for you each year.

How to calculate tithi in astrology?

Find the longitudinal difference between the Moon and Sun. Divide by 12. The result tells you which tithi is active. For instant results, use the Astrologer Bot's Tithi Calculator — it does the math automatically based on your date, time, and location.