Age-Grading Calculator

An 80% age grade means the age standard is 80% of your actual time, so your actual time is 125% of that standard. The calculation is age standard divided by actual time, multiplied by 100. The customary 90%/80%/70%/60% labels describe percentage bands, not verified competition standing or record eligibility.

Your age-graded percentage is the age standard (open standard divided by your age factor) divided by your actual time. Your age-graded equivalent time is your actual time multiplied by the age factor, which is 1.0 in the open-class years and decreases with age — so a masters runner's equivalent time is faster than their actual time.

They are as accurate as their factor tables. This calculator uses exact published per-age WMA factors — the WMA 2015 track tables for 100m-3000m and the 2025 WMA/USATF road tables for 5K through marathon — not interpolated five-year approximations. Factors are statistical models of world-best performances, so treat results as a strong benchmark rather than a guarantee.

Most runners consider anything over 60% solid (local class) and over 70% strong (regional class). Dedicated competitive masters athletes often target 80%+ (national class), while 90%+ is world class and typically requires near-elite training history.

That is the whole point of age grading: the factor removes the effect of aging. Multiplying a 60-year-old's time by their age factor (well below 1.0) estimates what that same performance would have been worth in their open-class prime.

Track events (100m, 200m, 400m, 800m, 1500m, Mile, 3000m) use the WMA 2015 factors as published in Howard Grubb's WMA lookup tables. Road events (5K, 10K, half marathon, marathon) use the 2025 WMA/USATF road factors from the canonical Alan Lytton-Jones tables. The edition is shown with every result.