Age Grading Calculator
Age grading compares your race time with the best expected time for your age and sex. This page uses the 2025 road-running age-grading standards approved by USA Track & Field's Masters Long Distance Running council on January 10, 2025. It supports road events only (road mile, 5 km to marathon) — not track, field or race walking.
Before you start
Method : Published age factors (USATF MLDR 2025 road age-grading standards) applied to your time.
Checked : Factors imported from the official 2025 spreadsheets and spot-checked on 2026-10-05; tests cover peak-age 100% cases, a worked masters case and invalid input.
Review : not reviewed by USATF, WMA or the table authors; not affiliated with them.
Your entries stay in this browser tab; nothing is sent or stored.
How to Use This Calculator
- Choose sex category and road event.
- Enter your age on race day and your finish time.
- Press Age-grade.
Methodology & assumptions
Standard: USATF MLDR 2025 road age-grading standards (version 2025-07-27 (approved 2025-01-10)), ages 5–100, events: Road mile, 5 km, 8 km, 10 km, 15 km, 10 miles, Half marathon, Marathon. Factors are copied exactly from the published spreadsheets.
Age standard = open-class standard ÷ age factor. Age grade = age standard ÷ your time × 100. Age-graded time = your time × factor (the open-age equivalent).
Worked examples
Man, 55, 5 km in 20:00: factor 0.8425; age standard 769 ÷ 0.8425 = 912.8 s (15:13) → 76.1%; age-graded time 16:51.
Man, 25, 5 km in 12:49 (the open standard): factor 1.0000 → 100.0%.
Woman, 30, marathon in 2:09:56 (open standard): factor 0.9983 → 100.2%.
Understanding your result
Use the percentage to compare performances across ages or distances. It isn't a fitness or health measure.
Sources & further reading
- A. Jones & T. Bernhard. 2025 road age-grading standards (MaleRoadStd2025.xlsx, FemaleRoadStd2025.xlsx), CC0.Age factors for ages 5–100; approved January 10, 2025 by USATF Masters Long Distance Running. Checked October 5, 2026.
Frequently Asked Questions
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