Plans, paces & PBs Choose 5K or 10K
Select the distance of the result. The underlying standards and factors differ between the two events.
Age Grade Calculator
Running Age Grade Calculator
Put a 5K or 10K result into age and sex context with an age-grade percentage and age-adjusted time.
How to use it
Compare like with context.
Use a genuine race or hard time-trial result. Similar courses and conditions make comparisons more meaningful.
Enter Your Details
Add sex, age and finish time. Use the comparison age if you want to translate the same performance level to another age.
Read the Percentage
Track the score over time or compare performances while remembering that weather, course profile and fitness history still count.
Worked example
A 20-minute 5K at age 45.
This example follows the calculator’s current male 5K factor table.
| Measure | Example result | What it means |
|---|---|---|
| Race time | 20:00 | The entered 5K result |
| Age factor | 0.9136 | The table factor for a 45-year-old male runner |
| Age standard | 14:12 | The reference performance after applying the factor |
| Age-grade score | 71.0% | Regional-class band in this calculator |
| Age-adjusted time | 18:17 | A comparison against the open standard |
From standard to percentage
Open standardThe fastest reference time in the selected table
Age factorThe adjustment associated with the selected age and sex
Age standardOpen standard ÷ age factor
Age-grade scoreAge standard ÷ your time × 100
Age-adjusted timeThe score translated back against the open standard
A comparison tool, not a crystal ball.
Age grade is useful for tracking how your performances develop over time and comparing results across age groups. It does not erase differences in training, injury history, course profile, surface or weather.
Factor tables can also vary between systems and editions. For consistent tracking, compare results using the same calculator and broadly similar race conditions.
Performance bands
How this calculator labels the score.
| Age grade | Band |
|---|---|
| 100% or more | Record level |
| 90%–99.999% | World class |
| 80%–89.999% | National class |
| 70%–79.999% | Regional class |
| 60%–69.999% | Local class |
| Below 60% | Below local class |
Next steps
Turn the result into useful training.
Frequently Asked Questions
Age grading questions
What is age grading in running?
Age grading compares a race result with a reference performance for the runner’s age and sex. It produces a percentage that makes performances from different age groups easier to compare.
What is a good age-grade percentage?
This calculator labels 60% and above as local class, 70% regional class, 80% national class and 90% world class. Treat the bands as useful context rather than a verdict on your running.
How is the age-grade percentage calculated?
The calculator uses an open standard and an age factor from its 5K or 10K table to calculate an age standard. The age standard is then divided by your race time and expressed as a percentage.
What does age-adjusted time mean?
Age-adjusted time translates the percentage back against the open standard. It is a comparison figure, not a prediction of the time you would literally have run at another age.
Can I compare runners of different ages or sexes?
Yes. Age grading is designed to put performances into age and sex context. Course, weather, fitness history and race conditions still matter, so comparisons are most useful when the events were broadly similar.
Why does this calculator only cover 5K and 10K?
RunningFastr currently provides complete factor tables for 5K and 10K only. Factor systems and editions can differ, so the calculator deliberately avoids inventing unsupported results for other distances.