Shadbala calculator, planetary strength Vedic astrology, rupas, Sthana Bala
Shadbala: the six-fold measure of planetary strength
A planet can be well placed and still underdeliver if it is weak. Shadbala is the classical way to put a number on how much power a planet actually has.
What Shadbala is
Shadbala means six strengths. It quantifies a planet's total power by combining six different sources of strength, expressed in a unit called rupas. As a rough guide, a planet at or above about five rupas is considered strong.
It turns a vague sense of a planet being good or bad into a comparable, numeric measure.
The six sources of strength
The six balas are Sthana Bala, positional strength from dignity and placement, Dig Bala, directional strength by house, Kala Bala, temporal strength from time of birth, Cheshta Bala, motional strength, Naisargika Bala, the planet's natural fixed strength, and Drik Bala, strength from aspects.
Each contributes a portion, and the total tells you whether a planet can deliver on its promise.
Why strength changes the reading
Dignity tells you the quality of a placement; Shadbala tells you the force behind it. A planet that rules a great house but is weak in Shadbala often promises more than it delivers, while a strong planet pushes its results through.
Reading dignity and strength together is far more reliable than judging a placement by sign alone.
How PI computes Shadbala
PI computes the full six-fold Shadbala in rupas for every planet, with the sub-components broken out, and presents it as bars and a radar in the strength view. Because it is computed deterministically, the AI can quote a planet's exact rupa value rather than guessing whether it is strong.
That keeps strength claims grounded: every number traces back to the computed Shadbala.