Age-Graded Running Score Calculator
Turn a race time into an age-graded percentage so you can compare performances across ages and distances — a simplified WMA-style score.
How it works
age-neutral time = your time × age factor · score % = open standard ÷ age-neutral time × 100
Age grading answers “how good is this really?” by discounting your time for the slowdown that age alone causes, then comparing it to a world-class open standard. The official World Masters Athletics tables use precise per-age, per-distance factors; this simplified version applies a smooth ~0.6%-per-year decline after age 30, which tracks the real tables closely through middle age. The result is a single percentage: 100% is world-class, 90%+ is national-class territory, and 60% is a solid club runner.
Worked example
A 40-year-old man runs a 45:00 10K (2,700 s). Age factor ≈ 1 − 0.006 × 10 = 0.94, so the age-neutral time is 2,700 × 0.94 = 2,538 s. Against a 1,620 s open standard, score = 1,620 ÷ 2,538 × 100 ≈ 63.8%.
Sources: World Masters Athletics age grading
Frequently asked questions
What is a good age-graded score?
Above 60% is a strong club runner, 70% is local-class, 80% is regional/national-class, and 90%+ is genuinely elite for your age. Most dedicated recreational runners land in the 50–65% range.
How is this different from the official WMA score?
This uses a smooth age-decline model rather than the WMA’s exact age-and-distance factor tables, so it will differ by a point or two — especially for the very young or over ~75. Use it to track your own trend and compare with friends, not for record certification.
Why can two runners with different times score the same?
That is the whole point: age grading normalises for age, so a 25-year-old’s 40:00 10K and a 60-year-old’s 50:00 can earn the same percentage. It rewards performance relative to what is physiologically possible at each age.
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This calculator is for educational purposes. Double-check important results before acting on them.