
How to Calculate Weton from a Birth Date (With Examples)
July 4, 2026
After learning what weton is, the next common question is, how do you actually figure out your own weton just from a birth date? The process is not as complicated as it sounds, as long as you know the steps and the neptu value assigned to each day.
Step One, Find the Market Day
The first thing you need to know is the market day that falls on your birth date. There are five market days in the Javanese calendar, namely Legi, Pahing, Pon, Wage, and Kliwon, which rotate every five days. Since this cycle differs from the regular calendar, the easiest way to find the market day is by checking a printed Javanese calendar, a Javanese calendar app, or one of the many free online weton calculators available.
Step Two, Learn the Neptu Values
Once you know the day and market day of birth, the next step is to add up their neptu values. The neptu values for each day are Sunday 5, Monday 4, Tuesday 3, Wednesday 7, Thursday 8, Friday 6, and Saturday 9. Meanwhile, the neptu values for market days are Legi 5, Pahing 9, Pon 7, Wage 4, and Kliwon 8.
Step Three, Add the Two Values Together
Once you have the neptu values for both the day and the market day, simply add them together to get the total weton neptu. For instance, someone born on a Thursday that falls on Legi has a total of 13, since Thursday is worth 8 and Legi is worth 5. Another example, if you were born on a Tuesday that falls on Wage, the total comes to 7, since Tuesday is worth 3 and Wage is worth 4.
If You Would Rather Skip the Manual Calculation
For those who find manual calculation a bit confusing, there are now many online weton calculators that only require your birth date, and the result appears instantly along with an explanation of character traits and other recommendations based on traditional almanacs.
Frequently Asked Questions
Is the weton calculation the same across all regions in Java?
Generally, the neptu values used for days and market days are fairly consistent across regions. Differences usually appear in how the final result is interpreted, not in the calculation method itself.
What exactly is neptu?
Neptu is the numerical value attached to each day and market day, used as the foundation for various calculations within Javanese traditional almanacs.
Can the calculated weton differ between sources?
It can, usually due to an incorrect birth date input or differences in the neptu reference values used. Because of this, it is important to make sure the birth date entered is accurate.
Does calculating weton require any special skill?
No. Anyone can calculate it as long as they know the neptu values for days and market days, or simply use an online weton calculator to speed up the process.
How is weton used to check compatibility between a couple?
The method involves adding the weton neptu of both individuals, then comparing the result against a traditional almanac table to see which compatibility category applies.
Is there a dedicated app for calculating weton?
Yes, there are now many apps and websites offering free weton calculators, requiring only a birth date to produce an instant result.
What does the total weton neptu represent?
The total weton neptu is the combined value of a person's day of birth and market day, later used for various interpretations within Javanese traditional almanacs.
Is weton calculated using the regular calendar or the Hijri calendar?
Weton is calculated based on the regular calendar birth date, which is then matched with the Javanese market day cycle, rather than being derived directly from the Hijri calendar.
What if I do not know my exact birth date?
If the exact birth date is unknown, calculating weton accurately becomes difficult, so it is recommended to check official documents such as a birth certificate first.
Does the weton calculation apply to any birth year?
Yes, as long as the birth date is known, weton can be calculated for any birth year, since the Javanese market day cycle runs continuously without interruption.
What should be done after finding the total weton neptu?
Once the total neptu is known, the number is usually matched against a traditional almanac table to determine character traits, compatibility, or auspicious days as needed.
Is there a difference between individual weton and combined couple weton?
Yes. Individual weton reflects a person's own character and neptu, while combined couple weton is calculated by adding both individuals' neptu values to assess compatibility.
Can neptu values differ depending on the almanac source?
The basic neptu values are generally standard, though some almanac sources may offer slight variations in how the final result is interpreted.
Do children born at different hours on the same day have different weton?
No. Weton is calculated based on the day and market day, not the hour of birth, so children born on the same day share the same weton regardless of the exact time.
How can I check the accuracy of an online weton calculator?
The best way is to cross check the calculator's result with a manual calculation using the day and market day neptu tables, to make sure there is no input or system error.
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