In Hinduism, are Durga and Kali the same goddess? Yes, same. Par Brahman has two forms Purush and Prakriti. Prakriti further 3 major forms Mata Saraswati , Lakshmi and Shakti (Parvati). Goddess Uma (Parvati/Sati) took birth as Goddess Sati and then as Goddess Parvati. Goddess Parvati then slayed demon Durgamasur and got the name Durga. Durga Mata has 9 forms, in that Kaalratri is 7th form. Kaalratri has further more divisions. She manifested into Mahakali , Bhadrakaali , Dakshin Kaali . Kaali Maa whom we know as the destroyer of Raktabij , Shumbh , Nishumbh , Chanda and Munda etc., is Mahakaali . Kaali is Mahakaali basically. She is the wife of Mahakaal (Lord Shiva). Now you might think that how many wives Lord Shiva have because Durga Mata and Kaali Mata are his wives? The answer is that he has only one wife i.e. Goddess Shakti who has different names and forms. Her most common name is Parvati because he took birth as Daughter of King Himavat (Himalaya is Parvat ), so she got the name Parvati. Her original form in which she resides at Kailash with Lord Shiva (also known as Shankar, Rudra, Mahadev etc.).. is Gauri. Goddess Parvati got the name Gauri because of her fair skin. So that's why Sati, Parvati, Uma, Gauri, Kaali / Mahakaali /Bhadra Kaali / Chamunda / Chandika , Durga/Bhavani/ Jagdamba /Amba/Ambika/ Mahishasur Mardini, Rudrani , Shivani, Shiv Patni, Mahadevi, Sheetala , Maheshwari, Shailputri , Kaushiki , Chandraghanta , Skandmata , Kushmanda , Ganesh Janani, Shakti/Adi Shakti/Adi Para Shakti these all are same. Only forms/appearance are different.