Age-Grade Calculator
Compare your race time to the world record for your age group. Age-grading accounts for the natural decline in performance with age, giving a fair comparison across runners of different ages.
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How the Age-Grade Calculator works
Age-grading uses World Masters Athletics (WMA) age factors - performance coefficients for each age group - to convert your actual time to an equivalent time for an open-category runner. This calculator uses the WMA 2015 road factors. A score above 60% is club level; above 80% is national class.
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Frequently asked questions
What is age-grading?
Age-grading adjusts your race time to account for how physiological performance changes with age. It lets you compare performances across different age groups on a fair basis - and compare your own performances over time.
What is a good age-grade score?
Under 50%: recreational. 50–59%: good club runner. 60–69%: club level. 70–79%: regional class. 80–89%: national class. 90%+: world class. Most recreational runners land between 45% and 60%.
Do age-grade factors change over time?
Yes. World Masters Athletics revises the age factors periodically, and the open-division world records the scores are measured against change whenever a record falls. This calculator uses the WMA 2015 road factors, against road world records last verified in August 2026.