Quick answer: a 50-year-old man who runs a 25:00 5K has an age grade of 58.42%. His age-graded time is 21:56, and the 2025 road tables put the standard for a 50-year-old man at 14:36 for the 5K. A 45-year-old woman with a 4:00:00 marathon scores 57.68%, with an age-graded time of 3:45:16.
How to use the calculator
Choose the table (male or female), type your age on race day in whole years, pick the road distance and enter your finish time as m:ss or h:mm:ss. The big figure is your age grade. The tiles give the age-graded time, the standard for your age, the open standard and the factor used. The table below the result shows what the same percentage means at every other road distance for the same age, from the road mile to 100K.
How age grading works
The tables give one age factor for each sex, age (5 to 100) and distance. The factor is 1 or less. Three figures come from it:
- Age standard = open standard / age factor: the time the tables expect from the best runner of that age.
- Age grade = age standard / your time, as a percentage.
- Age-graded time = your time x age factor: the equivalent time for an open-class runner.
According to the tables' documentation, 100% means you matched the open time for your age, and 50% means you took twice as long as a 100% runner. The tables do not define level names, so this page gives none.
Worked example by hand
Man, 50, 5K in 25:00 (1,500 seconds). The male 5K open standard is 12:49 (769 seconds) and the factor at age 50 is 0.8775. Age standard: 769 / 0.8775 = 876.35 seconds, or 14:36. Age grade: 876.35 / 1,500 = 58.42%. Age-graded time: 1,500 x 0.8775 = 1,316.25 seconds, or 21:56. At the same 58.42% he would run about 50:51 for the 10K, 1:51:07 for the half and 3:50:16 for the marathon.
Where the factors come from
Alan Jones builds the road tables from single-age best performances collected by Tom Bernhard. Standards are fitted for the 5K, 10K, half marathon and marathon, where the open standard is the world record; the other distances are interpolated on the log of the distance. The 2025 edition was approved on 10 January 2025 by the USATF Masters Long Distance Running Council, and the male mile standards were revised in July 2025. This calculator uses the version dated 27 July 2025.
Limits
These are road tables only: do not use them for track races, which have their own factors. Ages are whole years, so a birthday changes your factor in one step. A course that is short, downhill or wind-assisted will flatter the result, and a score over 100% usually points to a wrong distance or time. The equal-grade table is a comparison across distances at your age, not a race prediction.
Next: predict your other race times with the race time predictor, set training paces from the same race, or turn a finish time into pace with the pace calculator.
Age factors: Alan Jones, 2025 road age-grading tables (CC0), approved by the USATF Masters Long Distance Running Council. Tables on GitHub; USATF. Older runners comparing heart rate formulas can read the max heart rate formulas guide.
Sources: Alan Jones, Age-Grade-Tables: 2025 road age-grading tables (CC0-1.0); Alan Jones, Creating Road Running Age-Grade Tables (method document). Rules checked . Found a problem? Tell us.
Questions
What is an age grade in running?
It is your time compared with the standard for your age and sex at that distance, as a percentage. The standard is the open-class standard divided by your age factor, so 100% means you matched the table's standard for your age.
What is an age-graded time?
Your finish time multiplied by your age factor. It is the time an open-class runner would need to run to match your performance. A 50-year-old man's 25:00 5K age-grades to 21:56.
Which age-grading tables does this calculator use?
The 2025 road age-grade tables by Alan Jones, approved by the USATF Masters Long Distance Running Council on 10 January 2025 (version dated 27 July 2025, which updated the male mile).
Can I use this for track races?
No. The factors here are for road races only, from the road mile to 100K. Track events use different tables.
Why can my age grade be over 100%?
A score above 100% means a time faster than the table's standard for that age and distance. It usually means the course was short or the distance or time was entered wrongly.