Neptu is the traditional numeric weight primbon jawa assigns to every weekday and Pasaran day. Here's how the numbers combine and what they were historically used for.
Weekday Neptu Values
- Senin = 4
- Selasa = 3
- Rabu = 7
- Kamis = 8
- Jumat = 6
- Sabtu = 9
- Minggu = 5
Pasaran Neptu Values
- Legi = 5
- Pahing = 9
- Pon = 7
- Wage = 4
- Kliwon = 8
Combining the Two
Add your weekday value to your Pasaran value, and you get your weton's combined neptu.
Across all 35 wetons, combined neptu ranges from 7 (Selasa Wage) up to 18 (Sabtu Pahing).
Traditionally, this number was used for timing decisions and matchmaking calculations — comparing two people's combined neptu was one input into weighing compatibility.
What Neptu Is Not
Neptu is a traditional cultural framework, not a scientific measurement. It's best understood as one layer of a much larger system, alongside the Pancawara personality reading, rather than a standalone score to optimize.