Age-Grading calculations take into account your Age and Sex to produce a percentage score for your run. You can find out more about this by reading our advice article on Age Grading.
To adjust for hills, the flat equivalent length of the route should be used rather than the measured length. The Flat Equivalent Distance is shown on the Route Map page for any mapped route on the site.
The calculation uses data collated by the World Association of Veteran Athletics, to adjust your performance for age and sex. It takes World Record performances for each age and disatance, for men and women, and uses these as benchmarks. So, for example: if the World Record for a 40 year old man running 10 miles is 46:31 and another 40 year old man runs 10 miles in 58:30, he has an Age-Graded performance of 79.5% (46:31 divided by 58:30).