An age-grading percentage is a means of identifying the quality of a performance, adjusting for distance, age and sex.
Age gradings are a good way of comparing your own performances across various distances. They can also be used to compare your own performances against those of other runners.
The higher the percentage, the better the performance.
Age gradings are calculated with reference to tables compiled by considering a range of performances by different types of athletes.
This age-grading calculator uses the tables maintained by Alan Jones
To use the calculator simply enter your age, sex, distance and time.