Background:Oral submucous fibrosis (OSMF) is always associated with juxtaepithelial inflammatory reaction followed by fibroblastic changes in lamina propria, with epithelial atrophy leading to stiffness of oral mucosa and causing trismus and inability to eat. Mid upper arm circumference (MUAC) is a useful tool for a fast assessment of the nutritional status.Aims:The study was undertaken to evaluate the correlation of MUAC as a nutritional status indicator in OSMF patients.Patients and Methods:The study group comprised 50 clinically diagnosed and histopathologically confirmed cases of OSMF. MUAC was recorded using a plastic measuring tape. The right upper arm was measured at the midpoint between the tip of the shoulder and the tip of the elbow (olecranon process and the acromium).Results:Out of 50 subjects, 76% (38) were having MUAC value <23 cm, which shows an inverse relation between MUAC and clinical staging. The relation of MUAC with clinical staging was significant.Conclusion:The patient with OSMF becomes unable to eat due to burning, ulcers, and inability to open mouth, which affects the health of the individual. Thus, it is crucial to access the nutritional status to improve the survival rate of patients.