SplitLab

Age Grade Calculator

58.7%

3:25:27AG / open

Developing · factor 0.9783

yr
Whole years, 5 through 99, matching the WMA 2025 road tables.
Finish as h:mm:ss. Default marathon is 3:30:00.
mi
Miles or kilometers from the header toggle. Custom interpolates between 5K, 10K, half, and marathon.
Age standard
2:03:15
Open standard
2:00:35
Factor
0.9783

Age grade 58.7% is the age standard divided by your time. Age-graded time and open equivalent are your finish multiplied by the factor — same number. Developing is the usual masters label for that percentage (world ≥90, national ≥80, regional ≥70, local ≥60), not a ranking of the runner.

WMA 2025 road tables (Alan Jones / USATF MLDR, CC0). Road, not track. Men and women have separate factors. This is not a training plan.

Pace calculator · Marathon pace · Race time predictor · Half marathon pace · 10K pace · Fueling / gels.

Worked examples

  • Male 40 · marathon 3:30:00

    58.7% · AG 3:25:27 · factor 0.9783

  • Male 40 · marathon 3:00:00

    68.5%

  • Female 45 · half 2:00:00

    56.7%

  • Male 50 · 10K 45:00

    66.0%

  • Male 35 · 5K 20:00

    65.2%

Formulas

WMA 2025 road method (Alan Jones tables, CC0). Age standard is the open world standard divided by the single-age factor. Age grade is that standard divided by your finish. Age-graded time — also the open-class equivalent — is finish × factor. Other road distances interpolate those age standards on a log-distance scale between 5K, 10K, half, and marathon.

  • age_standard = open_standard / age_factor
  • AG% = (age_standard / actual_time) × 100
  • age-graded time = actual_time × age_factor
  • Men marathon open = 2:00:35 · age-40 factor = 0.9783

Alan Jones, Age-Grade-Tables, 2025 Files. Approved 2025-01-10 by the USATF Masters Long Distance Running Council. Road tables, not the 2023 track set. Pace · marathon · predictor · half · 10K · fueling · Boston qualifier · critical speed.

FAQ

How does age grade work?

Age grade % is the WMA age standard divided by your finish time. The age standard is the open world standard for that road distance divided by your single-age factor. A Male 40 marathon in 3:30:00 is 58.7% on the 2025 road tables (open 2:00:35, factor 0.9783). Age-graded time is finish × factor. There is no Calculate button — the percent updates live.

What is a good age grade?

Masters statisticians often label 90%+ world class, 80%+ national, 70%+ regional, and 60%+ local. Those bands describe the percentage, not the person. A 3:30 marathon at 40 is 58.7% on this page — developing on that scale, and still a real marathon.

WMA 2025 vs older tables?

This page uses the 2025 road revision (Alan Jones, approved 2025-01-10 by USATF MLDR). Earlier road sets were 2015 and 2020. Open men’s marathon is now 2:00:35. Older calculators will not match these percents.

Do men and women use the same tables?

No. WMA publishes separate male and female road factors and open standards. Women’s marathon open is 2:09:56. Switch Male / Female to load the matching table.

Road vs track — which tables are these?

Road only: 5K, 10K, half, marathon, with log-distance interpolation for custom road distances. Track age factors are a different WMA set and are not on this page.