The purpose of this study was to determine the similarities of international certification standards for ice hockey helmets. The American Society for Testing and Materials (ASTM), Committee European de Normalization (CEN), Canadian Standards Association (CSA) and International Organization for Standardization (ISO) protocols were compared. Only the impact testing methods at ambient temperatures were examined. Four helmet models, currently available to consumers, were used for testing. No significant differences (p<0.05) were found between the standards in a rank order comparison. Further analysis of differences, with peak accelerations separated by impact locations showed significant differences (p<0.05) between all standards, at four of the six defined impact sites, with no differences being found between standards at the side and front sites. Post-hoc pairwise multiple comparisons also showed significant performance differences (p<0.05) between helmet models.