Age grade calculator

Your age-graded score and equivalent time, for road races from 1 mile to 50 miles. Runs in your browser; nothing is saved or sent.

What this does: compares your race time with the best times ever run at your age and distance, as a percentage, so a 55-year-old and a 25-year-old (or your 5K and your marathon) can be compared fairly. It’s for any road runner, and especially useful for runners over 35 and anyone whose times have changed with age. Age grading adjusts a race time for age by comparing it with the fastest performances at that age and distance. Pick a set of standards, then enter your age on race day, the race and your time.

Standards to compare with

The tables are published as a men’s set and a women’s set. Pick the one you want; we show the other set’s result too.

Age on race day Race Your time h min s

How it works

Each age and distance has an age factor from the age-grading tables: 1.0000 in the peak years (roughly 20–30) and lower as age goes up. The math (Jones, 2024; World Masters Athletics, 2010):

Age-graded time = your time × your age factor. It is the time a runner in their peak years would run for the same performance.
Age standard = the open standard ÷ your age factor: the record-level time for your age, from the set of standards you chose.
Age-graded score = age standard ÷ your time × 100%. 100% is about world-record level for your age.

The open standard is the record-level time for the distance at any age; for the 5K, 10K, half marathon and marathon it is the world record, and the other distances are filled in between them (Jones, 2024). Our factors are the 2025 road age-grading factors, compiled by Alan Jones from single-age bests by Tom Bernhard and approved by the Masters Long Distance Running Council of USA Track & Field (Jones, 2025). They are public domain (CC0). Calculators built on older editions of the tables can show slightly different percentages.

The performance levels come from the World Masters Athletics explanation of the road standards (WMA, 2010):

Score	Level
Above 100%	Usually at least a record for that age and distance
About 100%	Approximately world-record level
Above 90%	World class
Above 80%	National class
Above 70%	Regional class
Above 60%	Local class

The best use of your score is tracking yourself: it lets you compare a 5K this spring with a half marathon five years ago on the same scale. For predicted times at other distances, try the pace calculator.

Sources

Jones AL. Age-Grade Tables: 2025 road running age standards (Bernhard T, single-age bests), approved by the Masters Long Distance Running Council of USA Track & Field. Public domain (CC0 1.0). Source
Jones AL. Creating Road Running Age-Grade Tables. 2024. Source
World Masters Athletics. Road Age Standards, WMA 2010: explanation of use and performance levels. Source

General information for healthy adult runners, not medical advice. If you have a medical condition or are new to running, build up gradually and talk to a doctor before racing.

Log every run and race by voice, and see each week what changed.
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Age grade calculator

How it works

Sources

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