The Army Physical Fitness Test (APFT), consisting of timed sit‐ups, push‐ups, and run, is the Army's method for measuring physical performance. The Army uses height and circumference measurements (HCM) to calculate percent body fat (%BF). Study objectives were to: 1) determine relationships between APFT results and %BF and 2) compare accuracy of body fat assessment methods: air‐displacement plethysmography (ADP), bioelectrical impedance analysis (BIA), and body mass index (BMI). Subjects were Reserve Officer Training Corps (ROTC) cadets (n=11M, 2F, 21.6±3.5y) from a Midwestern university. At a single visit, %BF was assessed using HCM, BIA, ADP, and BMI. The ROTC director provided APFT results. HCM, ADP, and BIA were strongly correlated (r>0.7, p<0.01). Composite APFT score was not correlated with any body fat assessment method. Push‐up number was negatively correlated with %BF by HCM, ADP, and BIA (r>‐0.7, p=0.001). Run time was positively correlated with %BF by HCM, ADP, and BIA (r>0.6, p<0.05). No correlations were found between %BF by HCM, ADP, or BIA and sit‐up number. BMI was not correlated with any variable. For this young, active population very strong correlations between HCM, ADP, and BIA suggest that HCM is a reasonable tool to estimate %BF of ROTC cadets. As %BF increases, number of push‐ups performed decreases and run time increases. However, the limited sample size may have impeded detection of other relationships between %BF and physical fitness, and did not allow for examination of sex differences.