25K Age-Graded Calculator
The 25K is rare outside a few well-known races, but it has a dedicated open standard and age curve in the Alan Jones 2025 tables. Enter the time, your sex and your age on race day and grade it directly.
Your race
Age-graded percentage
Enter your chip time and age at race to see your age-graded percentage, the open-class equivalent time, and the time you’d need today to match it.
What is a good 25K time for my age?
The standards pages list the finish time that scores 50, 60, 70, 80 and 90% at every age from 18 to 99, straight from the same tables this calculator uses.
Questions
What is a good 25K time for my age?#
A 45-year-old man reaches 70% at 1:45:28 and 80% at 1:32:17. A 45-year-old woman needs 1:55:34 for 70% and 1:41:07 for 80%. The 25K standards page has the full single-year table.
Should I grade a 25K or convert it to a half?#
Grade it. The tables carry a 25K standard, so a conversion would only add an estimate on top of a measurement. If you want to know what the same effort predicts over the half, the equivalent times page inside the app does that from your logged races.
Which tables does this calculator use?#
Road results are graded with the Alan Jones 2025 tables, approved by the USATF Masters Long Distance Running Council in January 2025. Track uses WMA 2023. Both are single-year age tables, so the result reflects your exact age on race day rather than a five-year bracket.
What counts as a good age-graded percentage?#
The usual shorthand is 60% local class, 70% regional class, 80% national class and 90% world class. In a big-city marathon field roughly one finisher in eighty reaches 80%. Anything above 70% puts you in the sharp end of most races.