Stress Profiles From Borehole Breakout Opening Width (SFBO) is a Python toolkit for estimating and visualizing stress magnitudes with depth from borehole breakout opening widths, rock strength data, pore-pressure information, and stress-gradient models. The software applies Monte Carlo uncertainty propagation and supports the characterization of in-situ stress conditions relevant for borehole stability, geothermal systems, underground gas storage, hydrogen storage, and other subsurface energy applications.