Background: Pulmonary aspiration of gastric contents is possibly associated with high morbidity and mortality. The current Indian Society of Anesthesiologists (ISA) fasting and feeding guidelines recommend oral intake of clear fluids safely until 2 hours before induction of general anesthesia (GA). This study compared residual gastric volume (RGV) and contents in patients following overnight fasting with those allowed oral fluids until 2 hours before surgery by ultrasonographic measurement. Materials and methods: The study was conducted on 60 patients aged 18–50 years, belonging to the American Society of Anesthesiologists Physical Status (ASA PS) I and II. Patients were allocated into two groups of 30 each, as group O, who fasted for a minimum of 8 hours overnight, and group F, who were allowed 350 mL clear fluids until 2 hours before surgery. Ultrasonography was done in both supine and right lateral decubitus (RLD) positions before surgery to measure antral cross-sectional area (CSA) and estimate RGV by using Perla's formula. Results: The mean CSA in group O was 3.73 ± 1.23 cm², and it was 3.87 ± 1.17 cm² in group F (p > 0.63). The mean RGV in mL/kg body weight was 0.74 ± 0.32 mL/kg BW (95% CI: 0.64–0.85) with a range of 0.22–1.54 in group O, compared to 0.57 ± 0.18 mL/kg BW (95% CI: 0.51–0.63) with a range of 0.34–1.29 in group F (p < 0.006), which is statistically significant. All the patients had clear fluid as gastric content, and none had any solid content. Conclusion: We conclude that, in patients posted for elective surgery who were allowed clear fluids up to 350 mL until 2 hours before surgery, the RGV is lesser than in the overnight fasted patients.