The purpose of this study was to determine the validity of the 6-minute arm ergometry test (6MAT) in predicting peak oxygen consumption (VO 2 peak) in individuals with chronic spinal cord injury (SCI). Fifty-two individuals with chronic SCI (age 38±10 years; American Spinal Injury Association Impairment Scale A-D, neurological level of injury C1-L2, years post-injury 13±10 years) completed an incremental arm ergometry VO 2 peak test and a submaximal 6MAT. Oxygen consumption data from both tests were used to create a predictive equation with regression analysis. Subsequently, a cross-validation group of an additional ten individuals with SCI (age 39±13 years; AIS A-D, NLI C3-L3, YPI 9±9 years) were used to determine the predictive power of the equation. All participants were able to complete both the VO 2 peak and 6MAT assessments. Regression analysis yielded the following equation to predict VO 2 peak from end-stage 6MAT VO 2 : VO 2 peak (mL·kg −1 ·min −1 ) = 1.501(6MAT VO 2 ) -0.940. Correlation between measured and predicted VO 2 peak was excellent (r=0.89). No significant difference was found between measured (17.41±7.44 mL·kg −1 ·min −1 ) and predicted (17.42±6.61 mL·kg −1 ·min −1 ) VO 2 peak (p=0.97). When cross-validated with a sample of ten individuals with SCI, correlation between measured and predicted VO 2 peak remained high (r=0.89), with no differences between measured (18.81 ± 8.35 mL·kg −1 ·min −1 ) and predicted (18.73 ± 7.27 mL·kg −1 ·min −1 ) VO 2 peak (p=0.75). Results suggest that 6MAT VO 2 can be used to predict VO 2 peak among individuals with chronic SCI. The 6MAT should be used as a clinical tool for assessing aerobic capacity when peak exercise testing is not feasible.