Background: Kidney stones, also known as renal calculi, are hard mineral and salt deposits that form within the kidneys. The present study was conducted to assess cases of kidney stones using USG. Materials & Methods:54 cases with kidney stones of both gendersunderwent colordoppler USG performed using Toshiba machine using transmit frequency of 2.5 to 6.0 MHz. The gray-scale US appearance of urinary stones was determined for size, echo difference between stone and adjacent tissue, and posterior acoustic shadowing. Results: Out of 54 patients, males were 24 and females were 30. Size <4 mm stones were seen in 28 and >4 mm in 26 patients. Echo findings found to be marked in 26, slight in 20 and indistinct in 8. The difference was significant (P< 0.05). Conclusion: Echo findings found to be marked, slight and indistinct. The colordoppler improves the detection, confidence and overall accuracy of diagnosis for renal and ureteral stones with minimal loss of specificity.