30K Age-Graded Calculator
Thirty kilometres is the classic marathon tune-up distance, and it has its own factor table. Enter the time, your sex and your age on race day and see what it is worth without converting it to something else first.
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 30K 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 30K time for my age?#
A 40-year-old man reaches 70% at 2:02:05 and 80% at 1:46:50. A 40-year-old woman needs 2:14:36 for 70% and 1:57:46 for 80%. The 30K standards page lists every age from 18 to 99.
Does a 30K age grade predict my marathon age grade?#
Roughly. Most runners hold a similar percentage from 30K to the marathon if the marathon goes to plan, and drop a few points if it does not. The marathon is the distance where the plan matters most.
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.