Title: Age Grading Calculator | runbundle
Headings: The Calculator
The Calculator
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Description
What is an age-grading percentage?
Using the calculator
How It Works
Judging quality
Description of terms
Athlete time
Senior athlete
Open-class-standard
Age-standard
Age-factor
Age-graded time
Age-grading percentage
Deriving factors
Road
Track
Non-standard distances
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The challenge
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parkrun age-grading percentages

Content: It is determined by dividing the age-standard time by the athlete time and converting the resulting proportion to a percentage: age-grading percentage = age-standard time / athlete time * 100
Deriving factors
The factors that are used to calculate age gradings are determined in different ways for track, road, and non-standard distances: Road
We calculate age gradings for road events using the tables maintained by Alan Jones. His web site contains detailed information about how the factors are derived and the tables are compiled and there are links to download the age-grading tables as spreadsheets. Track
Age gradings for track events are calculated using a mix of techniques. For senior athletes (ages 20-34), percentages are calculated by direct comparison of a performance to current world senior records. For athletes aged 35-100, the factors provided by WMA (formally WAVA) are applied to current senior world records to determine age standards, from which percentages are calculated. For athletes aged 5-19, we derive our own factors using the age-group world records, compiled by Dominique Eisold and then apply these to current senior world records to compile a table of age-standards, which can be used to calculate percentages. Non-standard distances
Our calculator allows you to enter any distance between 10 metres and 500 miles (804.67 kilometres). In order to determine age-grading percentages for these non-standard distances, linear interpolation is used to derive a factor between those for the two closest distances available in the relevant table.