What this result means
World Masters Athletics factors let you compare a clock time with a statistically elite standard for your age. Percent is standard ÷ (clock × factor). Age-graded time is clock × factor — the equivalent open-class time. The open standard is the tabulated 100% time for the distance and category.
How Good Is My Running Time? uses the same tables and emphasises the performance band. Use this page when you want the intermediate values, not only “regional class.”
A 50-year-old man’s 20:00 5K has a factor below 1, so age-graded time is faster than 20:00 and the percent is higher than a 25-year-old’s 20:00. A 3:30 marathon at 55 is a different percent from 3:30 at 25.
Unsupported distances (15K, trail 10 mile) are refused. The site does not invent factors.
Calculation method
Percent = open standard ÷ (clock × interpolated WMA 2015 factor) × 100. Age-graded time = clock × factor. Distances: 5K, 10K, half, marathon. Male/female as the table split, not a statement about identity.
Cite: World Masters Athletics age-grading factors, 2015 tables. Interpolated subset only.
Not an official ranking, not a qualifying standard. Downhill courses and wind are not in the table. Reverse age grading answers “what clock hits 70%?”
Frequently asked questions
What is age-graded time?
Clock time multiplied by the age factor. It is the equivalent open-class time on this table.
How is this different from How Good Is My Time?
Same WMA subset. That page leads with a friendly band. This page leads with percent, age-graded time, and the open standard.
Which distances work?
5K, 10K, half marathon, and marathon only.