Running Age-Grading Calculator
Score your race against the world standard for your age and sex.
What an age grade tells you
An age-graded percentage expresses your time as a fraction of the world-best standard for your sex and exact age. It lets athletes of very different ages compare performances fairly: an 80% run at 60 is a stronger result than a faster raw time from a 25-year-old at, say, 70%.
How it is worked out
Each event has an open (prime-age) standard time, S. An age factor F (at most 1.0) scales that standard to your age. Your age grade is S ÷ (F × your time) × 100, and your age-graded time is your time × F — what an open-age athlete would have run for the same quality of performance.
The class bands
As a rough guide: 100% is world-record class, 90%+ is world class, 80%+ national class, 70%+ regional, and 60%+ local class. They follow the spirit of the World Masters Athletics tables that parkrun and clubs use.
A note on accuracy
For simplicity this tool uses one age-factor table for both sexes — an acceptable approximation that the sex-specific open standards already partly correct for. Official WMA tables use separate factors and are revised periodically, so treat the percentage as a close estimate.
Questions
What is an age-graded percentage?
It expresses your time as a percentage of the world-best standard for your exact age and sex. It lets a 60-year-old and a 25-year-old compare performances fairly: 80%+ is national class, 90%+ is world class, and 100% equals the standard itself.
What is the age-graded time?
It is your time adjusted to what an open-age (prime) athlete would run for the same quality of performance — useful for tracking your own progress as you age, since your raw times will naturally slow but your age-graded time can hold or improve.
How accurate is this?
It uses age factors and open standards in the spirit of the World Masters Athletics tables that parkrun and clubs use. Treat the percentage as a close estimate; official tables are updated periodically and vary slightly by source.