How is the star rating calculated?
Interpretation of the test results is complex. So the overall safety assessment is expressed as a star rating to enable motorcyclists to quickly and easily identify those helmets likely to offer the highest level of protection: 5‐stars being the highest and 1‐star the lowest. The more SHARP stars a helmet has, the better the protection it can give beyond the minimum required by law.
A detailed answer to this question can be found in the document ‘SHARP rating calculation procedure‘ which can be found in the SHARP library section of this website.
