Atorvastatin calcium is a prescribed medication for hyperlipidemia that is widely used in Indonesia, both the innovator and its generic products. The performance of each product may vary, but generic products must meet quality standards of bioequivalence with the innovator. This study aimed to reveal the in vitro equivalence of eight atorvastatin calcium generic products from various manufacturers by comparative dissolution testing. Four generic name products (labeled G1-G4) and four branded generic products (coded B1-B4) from the Indonesian market were used to study their pharmaceutical equivalence with the innovator brand (Lipitor). In vitro dissolution testing was performed in gastrointestinal pH (1.2, 4.5, and 6.8) using USP apparatus 2 with 900 mL dissolution medium at 75 rpm and 37 ± 0.5 °C. The percentage of the dissolved drug was evaluated using the similarity (f2) factor. Atorvastatin calcium content for all products was 94.08-101.10% of the labeled claim. At pH 4.5 and 6.8, all products met the criteria for rapid dissolution (85% in ≤ 30 min). Dissolution percentages at pH 1.2 were more than 80% at 60 min. Based on f2 values, the dissolution profiles did not have similarity (i.e., f2 < 50) with the innovator at pH 6.8 for product G1 and B1, at pH 4.5 for product B1, and at pH 1.2 for product B2 and B3. Therefore, in vitro bioequivalency with the innovator product was established for four out of eight generic products.