This randomized controlled study compared the effectiveness of pulsed electromagnetic field (PEMF) therapy and pulsed ultrasound therapy on the range of motion in 40 knee osteoarthritis patients. Divided into two groups of 20, Group A received PEMF therapy, while Group B underwent pulsed ultrasound therapy over an 8-week period. Data analysis using SPSS version 23.0 revealed significant improvements in both groups. The ultrasound group showed an increase in the range of motion from 110.1±1.651 to 113.75±0.786 degrees (p=0.001), and the PEMF group showed an increase from 109.65±1.725 to 113.75±0.786 degrees (p=0.000). Both therapies were effective in improving the range of motion in patients with knee osteoarthritis. The pre and post-operatively range of motion of the US group was 109.65±1.725 degrees and 113.75±0.786 degrees respectively with a p-value of 0.000 which is significant. When assessing range of motion, both ultrasound and pulsed electromagnetic field therapy are used.