Average Running Finish Times

What does this calculator do?

This page shows an Endurometry seed median for a distance, age and sex: a recreational baseline at age 30, scaled by our approximate age factors (the same curve as age grading — not official WMA). “Faster” and “slower” rows are 0.85× and 1.18× sketches, not percentiles from a race field.

Default: 10K, age 40, male. Optional own time is compared with that seed median. The dedicated average-times articles and data page use the same seed; live submissions only dominate those article pages after enough verified results (see /data/).

How does it work?

Seed at 30: men 5K 27:00, 10K 55:00, half 2:00:00, marathon 4:00:00; women 32:00, 1:05:00, 2:20:00, 4:30:00 (plus 15K / 10 mile seeds on this tool only). Median(age) = seed₃₀ × f(30) / f(age). f is the Endurometry 5-year knot table. Top sketch = 0.85 × median; bottom = 1.18 × median.

If you type a time, the page reports how many percent it sits from that median (faster if your clock is shorter). It does not change the seed.

Formula

median = seed_30[sex, distance] × f(30) / f(age)
faster sketch = 0.85 × median
slower sketch = 1.18 × median

vs own time: 100 × (median / yours − 1)   // % faster if yours < median

Times to a second. Age 20–80. Optional time 1 min–8 h.

Worked example

How to interpret the result

A 40-year-old man seeing 0:56:27 is looking at our toy recreational scale, not Boston qualifying data. If your 10K is 50:00 you are “faster than this seed,” which is a weak claim. Use /data/ to see when real submissions outvote the seed on article pages.

To convert your clock toward open class, the age grading calculator uses the same f(age) and the same “not WMA” warning.

Assumptions and limitations

Assumptions

• The age-30 seeds are Endurometry recreational round numbers, not a federation table.
• Sex is a two-option seed split, not a physiology paper.
• Live mixing described on /data/ applies to generated average-times articles, not this calculator’s in-browser seed.

Limitations

• Not official statistics. Until live n is large on /data/, treat every number as a model.
• 0.85× / 1.18× are not 20th/80th percentiles of any race.
• Age factors are the Endurometry approximation, not WMA.
• 15K and 10 mile exist only on this tool’s seed, not on the 72 article pages.
• Age outside 20–80, or optional time outside 1 min–8 h, rejected.

Methodology and sources

Method type: Endurometry approximation

In-browser medians are Endurometry seed baselines at age 30 scaled by Endurometry age factors. Faster/slower rows are 0.85× and 1.18× sketches. This is an approximation, not World Athletics or WMA statistics. Article pages at /average-times/ may blend the same seed with submissions as documented on /data/.

• Methodology: Average finish-time seeds
• Methodology: Age grading (Endurometry approximation)
• Methodology: Rounding and displayed precision

Sources: Endurometry seed benchmarks · Endurometry age factors

Last reviewed: October 5, 2026