Raw time
Why the clock can mislead
A finish time tells you who crossed the line when. It does not tell you how demanding that result was for a runner's age group.
TruePace Run
Compare running performances fairly across age groups.
A 55-minute 10K does not mean the same thing at 27, 47 and 67. TruePace Run adjusts the result so you can compare the performance, not just the clock time.
Enter one race result below to calculate an age-adjusted time.
Calculate
Start with one result
Choose a standard race distance, enter the finish time, then add the runner's age and gender. For another runner or race, run the calculator again and compare the adjusted results.
Age-graded calculator
Enter one race result
Results use sourced 2025 road-running age standards and are informational estimates, not official rankings.
Age-graded result
Raw finish time55:00
Pace per km5:30
Pace per mile8:51
Age-graded percentage57.4%
Age-adjusted equivalent45:58
A 57-year-old male running 10K in 55:00 is age-adjusted to approximately 45:58. That means the performance is comparable to an open-age runner completing 10K in about 45:58.
2025 road age standards from Alan Lytton Jones' Age-Grade-Tables project (CC0-1.0); exact age 57, age standard 31:35, open standard 26:24, factor 1.196.Uses CC0 road-running age standards. Results are informational age-graded estimates, not official WMA rankings. Source files: 2025 Files/MaleRoadStd2025.xlsx, 2025 Files/FemaleRoadStd2025.xlsx at commit 4aac6737cb9f216c90a0a610355667cd3d921c61.Read the methodology
Age groups
Why age grading matters
Age grading gives older runners a way to judge the quality of a performance against open-age standards and nearby age groups.
Example
57-year-old vs 52-year-old
If both runners complete 10K in 55:00, the older runner has usually produced the stronger age-adjusted performance.
Guide
How age grading works
Age grading is a way of asking a better question than who crossed the line first. It asks how strong the performance was for that runner's age and gender.
What is age grading in running?
Age grading adjusts a running result for age and gender. It helps runners compare performances across different age groups using an adjusted time and percentage.
Why raw times are not enough
A 55-minute 10K at age 57 is not the same level of performance as a 55-minute 10K at age 27 or 37. The clock time is identical, but the age-group context is different.
How do age-graded running times work?
TruePace Run applies an age-grading factor to estimate an open-standard equivalent time. The percentage gives a simple view of how the result compares with a strong open-age benchmark.
How to use the result
Enter one result, note the age-adjusted equivalent time and percentage, then run the calculator again for another runner or race. Compare the age-adjusted result, not just the raw finish time.
Why compare age-adjusted race times?
Age-adjusted times are useful when clubmates, friends or past versions of yourself are in different age groups. They give the conversation a fairer performance baseline.
Limitations and data honesty
The calculator uses sourced 2025 road-running age standards and shows the source near each result. Results are useful estimates, not official rankings, race results or coaching advice.
Roadmap
Built for useful comparisons, then training context.
Single-result age grading for 5K, 10K, half marathon and marathon, with source notes shown near the result.
More practical guides for age-group runners, linked back to useful calculator actions.
A clear placeholder for Garmin and Strava integration so future versions can compare targets with recent training history.
FAQ
Frequently asked questions
Short answers for runners checking whether the calculator is the right tool for their result.
What does TruePace Run calculate?
TruePace Run takes one race result and shows the raw pace, an age-graded percentage and an age-adjusted equivalent time using sourced 2025 road-running standards.
Are the results official rankings?
No. The calculator is an informational guide for age-group runners. It is not an official ranking, race result, coaching plan or medical recommendation.
Which distances are supported?
The current calculator supports 5K, 10K, half marathon and marathon road distances. Unsupported ages are handled visibly rather than guessed.