Age grading answers the question a finish time leaves open: how good was that run for someone your age and sex? It compares your time with a standard for your exact age, sex and distance and reports the result as a percentage, so a 70-year-old and a 30-year-old in the same race can compare their runs on one scale. The same calculation gives an age-graded time, the open-class time your run is worth.
This age graded running calculator uses the 2025 road standards by Alan Jones, which are published as open data on GitHub and approved by the USATF Masters Long Distance Running Council, together with the performance levels on the USATF Masters age grading page. It shows the age factor and both standards behind your score, plus the time each level takes, so you can check every number by hand.
How the age grading calculator works
Every result comes from two numbers in the 2025 tables. The open standard is the 100% time for your distance and sex at the open-class ages. The age factor is a number at or below 1 for your age, and it falls as the standard slows with age. In his description of the method, Jones (2024) defines it so that your time multiplied by the factor is "a time that this person should be able to run as an open athlete." Four steps turn those two numbers into your results.
- Convert your time to seconds. A 5K in 25:00 is 1,500 seconds.
- Look up your open standard and age factor. For a woman of 45 in the 5K, the open standard is 13:54 (834 seconds) and the factor is 0.9078.
- Work out your age standard. Divide the open standard by the factor: 834 ÷ 0.9078 = 918.7 seconds, or 15:19. That is the 100% time for a woman of 45.
- Divide the age standard by your time. 918.7 ÷ 1,500 = 0.612, an age grade of 61.2%. For the age-graded time, multiply your time by the factor: 1,500 × 0.9078 = 1,361.7 seconds, or 22:42.
The two results agree: the open standard divided by the age-graded time gives the same 61.2% (834 ÷ 1,361.7). The factor is 1 only through the open-class ages, and that span depends on sex and distance. In the 2025 tables it runs from 19 to 29 for men in the 5K and from 22 to 35 in the marathon, while the women's marathon factor is 1 only at 26 and 27. Inside that span your age does not change your score.
What is a good age grade percentage?
The USATF Masters age grading page gives five levels for reading a score. They are the levels the calculator shows.
| Age grade | Level |
|---|---|
| 100% | Approximate world-record level |
| 90% and up | World class |
| 80 to 89.9% | National class |
| 70 to 79.9% | Regional class |
| 60 to 69.9% | Local class |
| Under 60% | No level named |
The levels mean the same at every age, which is the point of age grading: 70% at 70 is as strong, compared with the best runners of that age, as 70% at 30. For a 45-year-old woman in the 5K, local class starts at 25:31, regional class at 21:52 and national class at 19:08. A 60-year-old man needs 26:27, 22:40 and 19:50 for the same three levels.
The scale names no level under 60%, and a score there is not a failing grade. The levels say how close you came to the best runners of your age and sex, not whether your running is good for your health.
Age grade chart: 5K times for each level by age
This age grade chart gives the 5K time that reaches local class (60%), regional class (70%) and national class (80%) at each age, from the 2025 tables. Run the time shown or faster to reach the level. For other distances and ages, use the calculator above.
| Age | Women 60% | Women 70% | Women 80% | Men 60% | Men 70% | Men 80% |
|---|---|---|---|---|---|---|
| 25 | 23:10 | 19:51 | 17:23 | 21:22 | 18:19 | 16:01 |
| 30 | 23:16 | 19:56 | 17:27 | 21:22 | 18:19 | 16:01 |
| 35 | 23:39 | 20:17 | 17:45 | 21:45 | 18:38 | 16:18 |
| 40 | 24:23 | 20:54 | 18:17 | 22:33 | 19:19 | 16:55 |
| 45 | 25:31 | 21:52 | 19:08 | 23:25 | 20:04 | 17:33 |
| 50 | 26:58 | 23:07 | 20:13 | 24:21 | 20:52 | 18:15 |
| 55 | 28:35 | 24:30 | 21:26 | 25:21 | 21:44 | 19:01 |
| 60 | 30:24 | 26:03 | 22:48 | 26:27 | 22:40 | 19:50 |
| 65 | 32:28 | 27:50 | 24:21 | 27:39 | 23:42 | 20:44 |
| 70 | 34:50 | 29:52 | 26:08 | 29:03 | 24:54 | 21:47 |
| 75 | 37:35 | 32:13 | 28:11 | 31:12 | 26:44 | 23:24 |
| 80 | 41:05 | 35:12 | 30:48 | 34:30 | 29:34 | 25:53 |
Between 25 and 30 the times barely move, because the factor is at or near 1. From 40 to 70 the regional-class time slows by 45 to 72 seconds every five years for men and by 58 to 122 seconds for women. After 70 the steps grow to about two to three minutes.
The 100 percent times: open standards for every distance
The open standard is the 100% time for the open class, and it is the same at every age; your age standard is the open standard divided by your age factor. At the 5K, 10K, half marathon and marathon, the open standard is the road world record when the 2025 tables were built. At the other distances Jones adjusted a record by eye so that pace changes smoothly with distance, so those standards are smoothed values rather than records.
| Distance | Women | Men | Where it comes from |
|---|---|---|---|
| 1 mile | 4:13 | 3:47 | Smoothed record, with its own age curve |
| 5K | 13:54 | 12:49 | Road world record when the tables were built |
| 6K | 16:50 | 15:30 | Smoothed record, factors interpolated |
| 4 miles | 18:07 | 16:40 | Smoothed record, factors interpolated |
| 8K | 22:45 | 20:55 | Smoothed record, factors interpolated |
| 5 miles | 22:55 | 21:04 | Smoothed record, factors interpolated |
| 10K | 28:46 | 26:24 | Road world record when the tables were built |
| 7 miles | 32:30 | 29:50 | Smoothed record, factors interpolated |
| 12K | 34:44 | 31:55 | Smoothed record, factors interpolated |
| 15K | 43:49 | 40:15 | Smoothed record, factors interpolated |
| 10 miles | 47:12 | 43:15 | Smoothed record, factors interpolated |
| 20K | 59:17 | 54:20 | Smoothed record, factors interpolated |
| Half marathon | 1:02:52 | 57:31 | Road world record when the tables were built |
| 25K | 1:15:00 | 1:08:30 | Smoothed record, factors interpolated |
| 30K | 1:30:50 | 1:23:00 | Smoothed record, factors interpolated |
| Marathon | 2:09:56 | 2:00:35 | Road world record when the tables were built |
Records set after the tables were built are not in them, so a new record can grade above 100% until the next edition. Jones and Bernhard (2024) note that Jones has produced new road standards every five years since 2005.
How the 2025 standards were built
The tables start from single-age bests: the fastest road time run at each age, at each distance. Tom Bernhard compiles them now; earlier tables used lists from Ken Young of the Association of Road Racing Statisticians, who died in 2018. Jones fits one smooth curve per distance through the bests. It is built from five pieces (a curve for the youngest ages, a straight line, a flat open-class section, another straight line and a final curve) joined so that the slope never jumps. The aim is that no best grades over 100%, with as many ages as possible at exactly 100%.
Only four distances get their own fit: the 5K, 10K, half marathon and marathon, which Jones chose because they are raced far more often than the rest. Every distance between them takes its factors from the two nearest of those four, weighted by where it falls on a logarithmic distance scale. The 8K, for example, sits 0.678 of the way from the 5K to the 10K, so its factor at each age is 0.322 times the 5K factor plus 0.678 times the 10K factor. We checked every interpolated factor in the published files against that rule, and all but one (the men's 12K at age 80) match it to the fourth decimal place, within rounding.
The road mile has its own curve. For women its records cover masters ages only, and with no youth road mile records the men's youth values were estimated from the 5K. The men's mile standards were revised on July 27, 2025, after 2025 road mile results graded above 100%, and this calculator uses that revision. Past the marathon, the published tables reuse the marathon factor at every age for every distance up to 200 km. They say nothing new about ultra running, so this calculator stops at the marathon.
The shape of the factors matches what physiologists see in masters athletes. In a review in the Journal of Physiology, Tanaka and Seals (2008) describe peak endurance performance holding to about age 35, declining modestly until 50 to 60 and then falling more steeply. In the 2025 men's marathon table the factor is 0.978 at 40, 0.896 at 50, 0.814 at 60, 0.732 at 70 and 0.622 at 80. Tanaka and Seals also report a larger decline in women than in men, while noting that fewer older women race, and the women's marathon factor at 70 is 0.686 against 0.732 for men.
Age grading takes that decline out of the comparison, so an age grade that holds steady over the years means you are slowing no faster than the standard for your age. If you are over 50 and want to add strength training to your running, our comparison of the best fitness apps for over 50 ranks the options on how they treat joints and balance.
Is this a WAVA or WMA age grading calculator?
Not exactly, and the difference matters when you compare scores between calculators. The first age-graded tables were compiled in 1989 by WAVA, the World Association of Veteran Athletes, with National Masters News, for ages 30 and up; a 1994 update extended them to ages 8 to 19. WAVA is now World Masters Athletics (WMA).
According to the history of the tables, Alan Jones began building new tables with a curve-fitting method in 2002, working with Rex Harvey, and their first set was called the WMA 2002 tables. The 2010 and 2015 road tables were approved by both WMA and USA Track & Field (USATF). The 2020 and 2025 road tables list approval by the USATF Masters Long Distance Running Council only, on May 20, 2020 and January 10, 2025. That is why this page calls them the 2025 USATF road standards rather than WMA or WAVA tables.
Calculators labeled WMA 2023 use a different set of factors. Howard Grubb's age-grading calculators, for example, use 2023 WMA factors for track and field and the 2025 USATF factors from Alan Jones for road races. If two calculators disagree, check the year of the table and whether it is a road or a track table.
How accurate is this age grade calculator?
The arithmetic is exact. The standards behind it are estimates, and four limits are worth knowing before you compare scores.
100% is a fitted curve, not a list of records
Because each curve is drawn at or under every single-age best, the fastest runner at a given age rarely scores exactly 100%. In Jones and Bernhard's October 2024 evaluation of the proposed men's 5K standard, the single-age bests scored exactly 100.0% at five ages (7, 20, 41, 75 and 88) and between 93.5% and 99.7% at every other age from 16 to 77. Two runners with the same score at different ages can therefore sit at slightly different distances from the best run at their ages.
The oldest and youngest ages are the least certain
Records thin out past 85. In the same evaluation, the women's 10K best at age 90 scored only 52.6%, and the women's half marathon table had no single-age best at all for ages 88 to 92, so the curve there is set by the ages around it. Near 100 the curves run past the data altogether: the 2025 women's marathon standard is 6:12:12 at 90 and 34:38:56 at 100. The youth curves were refitted in 2025 after a poor fit in 2020, and the road mile has no youth records behind it. The calculator flags ages under 18 and from 85 up.
Only four distances are fitted to records
The 6K to the 30K are interpolated from the 5K, 10K, half marathon and marathon curves, so a score at 8K or 15K leans on records from other distances. The evaluation found the interpolated 8K curve almost identical to the 2020 one except at the youth ages, where the 2025 interpolation fixed a poor fit.
Standards change between editions
The October 2024 evaluation scored the newest single-age bests against both editions at the 5K, 10K, half marathon and marathon. Against the 2020 standards, the women's 5K bests scored over 100% at 12 ages, up to 103.7%, and the women's marathon bests did so at 13 ages, up to 107.4% at age 77. Against the 2025 standards, the only bests over 100% at those four distances were ones the authors set aside as outliers: the women's 5K at 68 and the women's marathon at 63, 77 and 82. Women's standards moved most because women's records improved most, and the men's single-age bests changed less. Running the same results through both editions shows what that does to a score.
| Runner | Race | 2020 tables | 2025 tables |
|---|---|---|---|
| Woman, 45 | 5K in 25:00 | 62.7% | 61.2% |
| Woman, 35 | 10K in 50:00 | 60.3% | 58.4% |
| Woman, 70 | Marathon in 4:30:00 | 74.6% | 70.2% |
| Man, 60 | 5K in 22:00 | 72.1% | 72.1% |
| Man, 50 | Half marathon in 1:40:00 | 65.0% | 64.9% |
| Man, 45 | Marathon in 3:30:00 | 62.2% | 61.3% |
Compare scores only within one edition. A drop of a point or more between a 2019 result and a 2025 result can come from the new table rather than from you.
What age grading cannot correct for
A standard cannot see your course or your day. Hills, heat, wind, altitude, a net-downhill course or a short course all move your time without changing your factor, and the standards come from road races, so a track time is not directly comparable. An age grade also compares one race with one standard. It does not tell you what you would run at another distance; the race time predictor does that with the Riegel formula.
Worked examples: age grades for eight runners
Each row is a calculation from the 2025 tables, so you can check the calculator against it.
| Runner | Race | Age factor | Age-graded time | Age grade | Level |
|---|---|---|---|---|---|
| Woman, 45 | 5K in 25:00 | 0.9078 | 22:42 | 61.2% | Local class |
| Man, 30 | Marathon in 3:30:00 | 1.0000 | 3:30:00 | 57.4% | Under 60% |
| Man, 40 | 1 mile in 6:00 | 0.9289 | 5:34 | 67.9% | Local class |
| Man, 50 | Half marathon in 1:40:00 | 0.8860 | 1:28:36 | 64.9% | Local class |
| Woman, 55 | 10 miles in 1:30:00 | 0.8268 | 1:14:25 | 63.4% | Local class |
| Man, 65 | 5K in 19:00 | 0.7725 | 14:41 | 87.3% | National class |
| Woman, 70 | Marathon in 4:30:00 | 0.6859 | 3:05:12 | 70.2% | Regional class |
| Woman, 80 | 10K in 1:05:00 | 0.5745 | 37:21 | 77.0% | Regional class |
Three rows show how the scale works. The man of 30 is in the open-class ages, so his factor is 1 and his age-graded time equals his real time. The woman of 70 reaches regional class with 37 seconds to spare, since 70% at her age is 4:30:37. And the man of 65 scores 87.3%, national class, with a 19:00 5K that would score 67.5% at age 30.
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Age grading compares road race times. In these cases the score will mislead you, or another tool fits better.
- Track races and race walks. These are road running standards. Track events and race walking have their own age-grading factors, so use a calculator built on those.
- Trail races and ultramarathons. Trail courses vary too much for a road standard, and the 2025 tables carry no separate ultra factors.
- Unusual courses or conditions. A net-downhill or short course, a hot day or high altitude changes your time without changing the standard.
- Runners under 18 or 85 and over. The standards are least certain at these ages, so read small differences in score loosely.
- A time for another distance. Use the race time predictor. An age grade only scores a race you have run.
- A health question. An age grade rates performance, not health. If you have a heart condition, chest pain or dizziness when you run, or have been told to limit hard exercise, talk to your doctor before racing all-out.
Related reading
References
- Jones A. Road age-grading standards 2025: FemaleRoadStd2025.xlsx (as uploaded May 25, 2025) and MaleRoadStd2025.xlsx (version 2025-07-27), with the 2025 Readme. Age-Grade-Tables repository, GitHub, CC0-1.0. Approved by the USATF Masters Long Distance Running Council on January 10, 2025. github.com/AlanLyttonJones/Age-Grade-Tables, 2025 Files
- Jones A. "Creating Road Running Age-Grade Tables." October 23, 2024. Age-Grade-Tables repository, Docs. PDF on GitHub
- Jones A, Bernhard T. "Evaluating Proposed 2024 Age-Grade Standards Against 2020 Rankings." October 27, 2024. Age-Grade-Tables repository, Docs. PDF on GitHub
- Jones A. "Age-Grade Tables," a history of the tables from 1989. July 25, 2025. Age-Grade-Tables repository, 2025 Files. PDF on GitHub
- Jones A. Road age-grading standards 2020: FemaleRoadStd2020.xlsx and MaleRoadStd2020.xlsx. Approved by the USATF Masters Long Distance Running Council on May 20, 2020. github.com/AlanLyttonJones/Age-Grade-Tables, 2020 Files
- USATF Masters. "Age Grading." 2018. usatfmasters.org/age-grading
- Tanaka H, Seals DR. "Endurance exercise performance in Masters athletes: age-associated changes and underlying physiological mechanisms." J Physiol. 2008;586(1):55-63. doi:10.1113/jphysiol.2007.141879, PMC2375571
- Grubb H. Age-grading calculators for road, track and field and walks. howardgrubb.co.uk/athletics
How this calculator differs from typical age grading calculators
Many online age grading calculators print a percentage without saying which edition of the tables they use, or whether the factors are for the road or the track. Few show the age factor or the standards behind the score, the time each level takes at your age, or what the standards cannot do. Fewer still say that the numbers move between editions, by more than four points for some older women.
This calculator embeds the 2025 USATF road tables exactly as published: factors to four decimals for women and men, ages 5 to 100 and 16 road distances. It shows the factor, the open standard, the age standard and the time for every level, and its source line says whether your distance is fitted to records or interpolated. It flags the ages where the standards are least certain and will not print a score for a time that grades above 100% or an impossible input. It also stops at the marathon, because the published ultra factors only repeat the marathon's.
Frequently Asked Questions
How do you calculate an age grade?
Divide the age standard for your age, sex and distance by your finish time. The age standard is the open standard divided by the age factor from the tables. For a 45-year-old woman in the 5K, the 2025 tables give an open standard of 13:54 (834 seconds) and a factor of 0.9078, so her age standard is 834 ÷ 0.9078 = 918.7 seconds, or 15:19. If she runs 25:00 (1,500 seconds), her age grade is 918.7 ÷ 1,500 = 61.2%. Her age-graded time is 1,500 × 0.9078 = 1,361.7 seconds, or 22:42.
What is a good age grade percentage?
On the scale USATF Masters publishes, 60% is local class, 70% regional class, 80% national class, 90% world class and 100% is about world-record level for your age. The levels mean the same at every age, which is what makes them comparable. For a 45-year-old woman in the 5K, local class starts at 25:31, regional class at 21:52 and national class at 19:08. For a 60-year-old man, the same three levels start at 26:27, 22:40 and 19:50.
How accurate is an age grade calculator?
The arithmetic is exact, but the standards are estimates fitted to records. The 2025 tables draw each curve at or under the fastest time on record at every age, so even those record runs rarely score 100%: in Jones and Bernhard's October 2024 evaluation of the men's 5K standard, they scored exactly 100.0% at five ages and 93.5% to 99.7% at every other age from 16 to 77. Only the 5K, 10K, half marathon and marathon are fitted to records; the distances between them are interpolated. Standards also change between editions: a 45-year-old woman's 25:00 5K scores 62.7% on the 2020 tables and 61.2% on the 2025 tables.
What is an age-graded time?
It is your time multiplied by your age factor: the open-class time your run is worth. A 45-year-old woman's 25:00 5K has an age-graded time of 22:42, because her factor is 0.9078. The open standard divided by the age-graded time gives the age grade again, since 13:54 is 61.2% of 22:42. The factor is 1 only through the open-class ages, and the span depends on sex and distance: 19 to 29 for men in the 5K, but only 26 and 27 for women in the marathon.
Is this the WAVA or WMA age grading table?
It is the 2025 road table that grew out of them. WAVA, now World Masters Athletics (WMA), compiled the first age-graded tables with National Masters News in 1989. Alan Jones and Rex Harvey built new tables from 2002, first called the WMA 2002 tables, and the 2010 and 2015 road tables were approved by both WMA and USA Track & Field. The 2020 and 2025 road tables, which this calculator uses, list approval by the USATF Masters Long Distance Running Council only.
Why do age grading calculators give different results?
Most differences come from the edition of the tables. Jones has produced new road standards every five years since 2005, and women's records have moved the most since 2020: the same 25:00 5K by a 45-year-old woman scores 62.7% on the 2020 tables and 61.2% on the 2025 tables, and a 70-year-old woman's 4:30:00 marathon drops from 74.6% to 70.2%. Track tables and rounding add smaller differences. Check which table a calculator uses before you compare scores.
Can I age grade a track race, trail race or ultramarathon?
Not with this calculator. These are road standards, and track events have their own tables: Howard Grubb's age-grading calculators, for example, apply 2023 WMA factors to track and field. Trail courses vary too much for a road standard. For ultras, the 2025 road tables reuse the marathon age factor at every age for every distance from 50 km to 200 km, so they add nothing beyond the marathon, and this calculator stops there.