Age & Weton Calculator
betaEnter your date of birth to see your exact age — years, months and days — along with totals (months, weeks, days, hours), the day of the week you were born, and how long until your next birthday. It also computes your Javanese weton (the pairing of the weekday with the 5-day pasaran cycle) and its neptu. Everything is calculated on your device; nothing is uploaded.
Work out an exact age — years, months and days — plus total months, weeks, days and hours, the weekday you were born, and your next birthday. It also shows your Javanese weton (weekday + pasaran) and neptu. Everything is calculated in your browser.
How to use Age & Weton Calculator
- 1 Pick your date of birth.
- 2 Leave “Age at date” on today, or set another date to compare.
- 3 Read your exact age, totals and next birthday.
- 4 Check your weton (e.g. Jumat Legi) and neptu below.
Frequently asked questions
Is my birth date uploaded anywhere?
No. The calculation runs entirely in your browser with plain date math — your date of birth never leaves your device.
How is the exact age calculated?
It counts full calendar years, then months, then days (borrowing across months and leap years), so the result matches how you would say your age out loud.
What is a weton and neptu?
A weton is the Javanese pairing of the 7-day week with the 5-day pasaran cycle (Legi, Pahing, Pon, Wage, Kliwon) — for example “Jumat Legi”. Neptu is the numeric value of each part; their sum is used in Javanese tradition.
Can I calculate age at a past or future date?
Yes. Change the “Age at date” field to any date to see the age, totals and weton relative to that day.
Does it work offline?
Yes. PDFPowerHub is a PWA, so once loaded the calculator works with no internet connection.