All other running (2018)
Enter best time ever:
Hours Minutes Seconds
Age at best time ever


These calculations use the updated running age factors in Fair and Kaplan (2018). See 2018 Updated Age Factors. They are based on world single age records for men compiled by ARRS: World Single Age Records. Four road races were pooled---5km, 10km, half marathon, marathon---along with two outdoor track events---5000 meters and 10000 meters. The data are as of June 2, 2017. As with the 2007 age factors, these age factors should be used for all running events except 100, 200, and 400 meters. They can also be used for women. However, since the swimming results in Fair (2007) suggest that women slow down a little faster than men, these age factors may be a little too low for women.

The results in Fair and Kaplan (2018) begin with age 40 rather than age 35 and end with age 95 rather than age 100. The following age factors thus begin with 40 and end with 95, where the factor for age 40 is 1.0000. This means that any decline between ages 35 and 40 is not accounted for. It is just assumed that decline begins at age 40. There is probably some decline between 35 and 40, but it is quite modest, possibly about one percent total over the five-year period. Although this possible decline is ignored here, the user can if desired just increase each factor by about one percent to get factors with a starting age of 35. The age factors are:


AgeFactorAgeFactorAgeFactor
40 1.0000 61 1.2292 82 1.5769
41 1.0099 62 1.2414 83 1.6274
42 1.0199 63 1.2536 84 1.6870
43 1.0299 64 1.2660 85 1.7565
44 1.0401 65 1.2785 86 1.8371
45 1.0504 66 1.2911 87 1.9300
46 1.0607 67 1.3039 88 2.0365
47 1.0712 68 1.3168 89 2.1585
48 1.0818 69 1.3298 90 2.2981
49 1.0925 70 1.3429 91 2.4575
50 1.1033 71 1.3562 92 2.6397
51 1.1142 72 1.3696 93 2.8480
52 1.1252 73 1.3831 94 3.0865
53 1.1363 74 1.3968 95 3.3598
54 1.1475 75 1.4106
55 1.1588 76 1.4245
56 1.1703 77 1.4386
57 1.1818 78 1.4532
58 1.1935 79 1.4733
59 1.2053 80 1.5004
60 1.2172 81 1.5347