学位 (xuéwèi) refers specifically to an academic degree conferred by a university (e.g., bachelor's, master's). 学历 (xué lì) is broader — it means your educational background or the level of schooling you completed (e.g., high school, college). 程度 (chéng dù) is unrelated; it means 'degree' as in level or extent of something (e.g., proficiency).