Age-Graded Running Score Calculator

About this calculator

Age-grading compares a runner’s time against the world-record-level standard for their exact age and sex at that distance, expressing the result as a percentage. It’s the tool masters running relies on to compare performances fairly across ages, using the World Masters Athletics age-grading tables, since raw times naturally decline as athletes get older.

Running clubs, masters competitions, and runners tracking their own fitness over the years all use it — a 90% age-graded performance from a 55-year-old represents the same relative quality of effort as a 90% performance from a 25-year-old, even though the actual clock times are very different.

This calculator takes your age, sex, race distance and time, and returns your age-graded percentage and score.