Prokerala offers a robust free calculator that includes Lahiri Ayanamsa by default. Its "extra quality" feature is the graphical representation of each Bala, allowing you to see at a glance which planet is deficient. It also calculates the crucial Shadbala Ratio, which is often missing from entry-level tools.
For beginners, AstroVed offers a "lite" but high-quality free calculator. It simplifies the six strengths into a speedometer-style gauge (0-100%). While not as granular as J-Hora, its interpretation quality is excellent, explaining exactly what to do if a planet is weak (e.g., "Recite the Vishnu Sahasranama for low Jupiter Bala"). shadbala calculator free extra quality
Even with an extra quality tool, users make errors. Avoid these: Prokerala offers a robust free calculator that includes