Calculators
Uses the 2025 road age-grading tables (Alan Jones, approved by USATF)
How does this work?What is Performance by Age?
Performance by Age allows you to compare your race times against other runners of different ages and sexes. It essentially answers the question, 'How good was my run compared to the world record for someone of my age and sex?'
We use the 2025 road age-grading tables by Alan Jones, approved by USATF — the current road racing standards. A score of 100% matches the world record for your age and sex, 90%+ is international elite, and 80%+ is a pro-level run.
For most recreational runners, a run scores between 40% and 60%. Above 60% is an excellent run, above 70% a high-level one, and above 80% the pace of professional runners your age. The score describes one run, not you: the same runner can score 48% one day and 58% on another. Use it to track your progress over the years — many runners find their Age Grade actually improves into their 40s and 50s as they train smarter.
Performance by Age is particularly useful when comparing performances across years of your own running history. A 45-minute 10K at age 55 may represent a higher Age Grade than a 40-minute 10K you ran at age 30 — acknowledging that you are running at a higher level relative to your physiological peak.
How does this work?
Why should I use Performance by Age?
As we age, our physiological peak changes. Performance by Age keeps you motivated by showing your relative performance. It's a great way to compete in a virtual field where a 50-year-old's performance can be compared fairly against a 20-year-old's.
How can I improve my Age Grade score?
The same principles that improve raw race times also improve your Age Grade: consistent training volume, structured interval sessions, and adequate recovery. Masters runners (40+) benefit especially from strength training, which helps counteract the loss of fast-twitch muscle fibres that comes with age.
Does Performance by Age work for track distances?
The age-grading tables used in our calculator are calibrated specifically for road races (5K, 10K, half marathon, marathon). Track events and ultramarathons have separate tables. If you enter a track time, the result is an approximation and may be less accurate than it would be for an equivalent road race.