Age Graded Running Calculator
Calculate your age-graded percentage and open-age equivalent time to compare performances across ages and sexes.
63.2%
Age-graded performance
41:24
open-age equivalent time
0.920
age factor
Note: Age grading compares your time to an age- and sex-adjusted world standard. 100% is world-record level; 90%+ is world class, 80%+ national class, 70%+ regional class. These factors are an approximation of the WMA tables.
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About the Age Graded Running Calculator
Learn more about the calculator and its creator
Jonas
I have been a runner for over 10 years and I built this calculator to help runners like you and me with training and racing.
The age-graded running calculator answers a question raw finish times cannot: how good is your performance once you account for your age and sex? It compares your time to an age- and sex-adjusted world standard and returns a percentage, letting a 55-year-old and a 25-year-old compare results on a level field.
How Age Grading Works
Age grading, developed by World Masters Athletics (WMA), is built on two pieces of data for each distance: the open-class world standard (an approximate best time) and an age factor that adjusts that standard for the slowing that comes with age. The percentage is:
Open-age equivalent = Your time × Age factor
The age factor is 1.00 for an open-age athlete and falls below 1.00 as you get older, reflecting the decline in performance capacity.
Approximate Age Factors (Distance Running)
| Age | Factor | Age | Factor |
|---|---|---|---|
| 30 | 1.000 | 55 | 0.806 |
| 35 | 0.966 | 60 | 0.753 |
| 40 | 0.929 | 65 | 0.697 |
| 45 | 0.888 | 70 | 0.638 |
| 50 | 0.849 | 75 | 0.575 |
What the Percentage Means
- 100%: world-record-equivalent for your age and sex.
- 90%+: world class.
- 80–90%: national class.
- 70–80%: regional class.
- 60–70%: local class — a strong club runner.
Why It Is Useful
Age grading lets you track improvement even as your raw times slow with age — your percentage can keep climbing through your 40s and 50s if your fitness relative to your peers improves. It also enables fair competition: many races award prizes by age-graded score so masters athletes compete on equal terms with the open field.
Note: The factors here approximate the official WMA tables, which are revised periodically and differ slightly by distance. Use this as a guide; for sanctioned results consult the current official age-grading tables. Informational only, not medical advice.
Frequently Asked Questions
Over 90% is world class, 80–90% national class, 70–80% regional class, and 60–70% a strong local runner. 100% equals an age-group world record.
Your time is compared to an age- and sex-adjusted world standard, then expressed as a percentage so runners of any age can be compared fairly.
These approximate the official World Masters Athletics tables, which are revised periodically and vary slightly by distance. Use them as a guide.
What is a good age-graded score?
How does age grading work?
Are these the official WMA factors?
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