Age Grading Calculator
Age grading levels the playing field across ages and sexes. Convert your running time into a percentage of the open-class standard and see your open-age equivalent.
Your performance
Running distances (5K to marathon).
Unlock your personalised fuelling plan + Hexis carb targets
Enter your email for a personalised race-day fuelling plan, plus your carb targets from our nutrition partner Hexis.
Unsubscribe anytime. We respect your privacy.
We earn a commission if you buy through this link, at no cost to you. Learn more
How this calculator works
Your equivalent open-age time is your finish time multiplied by an age factor interpolated from a representative WMA-style curve. Age grade is the open-class standard divided by that equivalent time. Standards are set near current world-best times.
Assumptions
- • Representative age-factor curve and open standards
- • Standard road-race distances
Limitations
- • Approximation — not the official WMA factor tables
- • Triathlon-specific age-grading is not yet supported
Who this is for
- • Runners comparing performances across ages
- • Masters athletes tracking relative performance over time
Who this is not for
- • Official record or championship qualification (use WMA tables)
- • Triathlon overall times (running distances only for now)
References
Related Articles
Continue exploring our comprehensive triathlon resources
Age Grading Calculator FAQ
Scientific References
Source of the official age-grading methodology this tool approximates