Age-Grade Calculator

An age-grade calculator produces a percentage score for your race time by comparing it to the world-best time for your age and gender at that distance. For example, a score of 62% means your time is 62% as fast as the world record equivalent for your age group. It lets runners of different ages and genders compare performances on a level playing field.

Your age-grading percentage is calculated by dividing the age-standard time (the world-best time adjusted for your age and sex) by your actual finish time, then multiplying by 100. A higher percentage means a better performance relative to your peers worldwide. Each distance produces a different score, so a 70% at a 5K and a 70% at a marathon represent similar quality performances.

The percentages map to approximate performance levels: 100% equals the world record, 90%+ is world class, 80%+ is national class, 70%+ is regional class, and 60%+ is local class. Anything above 60% is a solid performance by competitive running standards.

Age-grading gives you a fairer benchmark for your fitness level by accounting for natural age-related decline in performance. Whether you're a 25-year-old or a 65-year-old, your score reflects how well you're performing relative to the best runners your age, making it a great way to track improvement over time or compare yourself with runners of different ages and genders.

The age-graded time is calculated by multiplying your actual finish time by the age-factor for your age and gender. This produces the equivalent time you would have run as a peak-age open-class athlete. It's useful for comparing performances across different events and age groups.

Yes, but with some caution. Age-grading percentages are designed to be comparable across distances, so a 70% score at a 5K and a 70% score at a half marathon represent similar levels of performance relative to world bests. However, most runners naturally excel at some distances more than others, so differences in scores across events also reflect event-specific strengths.

Yes. The open-class world standards (the benchmark times) are different for men and women, and the age-related adjustment factors also differ by sex. The calculator applies the correct standard and factor for your selected sex, ensuring your percentage accurately reflects your performance within your gender category.

Age-grading tables are periodically updated by organizations like World Masters Athletics as world records are broken and statistical models are refined. The tables used in this calculator are based on widely accepted standards. Slight differences may exist between different calculators depending on which version of the tables they reference.