Uses the 2025 road tables approved by the USATF Masters Long Distance Running Council. Age grade = open standard ÷ (finish time × age factor) × 100.
The source tables are released under CC0.
2025 road age-grading source tablesThe published open standard divided by your age-adjusted time.
Use the 2025 road tables approved by the USATF Masters Long Distance Running Council to calculate an age-grade percentage, published factor, open standard, and equivalent open-age time.
Age grading combines a published open standard with a one-year factor for age, sex category, and event. This calculator uses the 2025 road tables approved by the USATF Masters Long Distance Running Council.
The calculator first multiplies finish time by the age factor to produce an age-adjusted equivalent. It then divides the event's open standard by that adjusted time and multiplies by 100. The percentage is a comparison with the published table—not a prediction of what the athlete would run at another age.
Select age on race day, the table's male or female category, and the matching road distance. This tool supports integer ages 30 through 99 and the four distances developed directly in the source tables: 5K, 10K, half marathon, and marathon. It does not interpolate other events or extrapolate unsupported ages.
Age grading is useful for personal trends, masters competition context, and broad comparisons. Course measurement, elevation, weather, competition depth, injury, and training still matter. A value above 100% means the entered result is faster than the published open standard, so the event, category, course, and time should be checked carefully.
Age grade equals the open standard divided by finish time multiplied by the age factor, then multiplied by 100: open standard ÷ (finish time × factor) × 100.
The calculator uses the CC0 2025 road tables developed by Alan Jones with single-age bests from Tom Bernhard and approved on January 10, 2025 by the USATF Masters Long Distance Running Council.
It is the entered finish time multiplied by the published age factor. It is a standardized comparison value, not a replacement for the official race result or a guaranteed open-age performance.