Swimming, 50 meters or yards, men
Enter best time ever:
Minutes Seconds
Age at best time ever

The above calculations use the swimming age factors in Table 3 in Fair (2004). They are based on pooling all the 50 meter and 50 yard swimming events for men. See the discussion in the paper. The age factors are:

AgeFactorAgeFactorAgeFactor
35 1.000 60 1.112 85 1.481
36 1.004 61 1.117 86 1.527
37 1.009 62 1.121 87 1.577
38 1.013 63 1.126 88 1.632
39 1.017 64 1.131 89 1.692
40 1.021 65 1.136 90 1.757
41 1.026 66 1.141 91 1.827
42 1.030 67 1.145 92 1.904
43 1.035 68 1.150 93 1.988
44 1.039 69 1.155 94 2.079
45 1.043 70 1.160 95 2.179
46 1.048 71 1.165 96 2.287
47 1.052 72 1.172 97 2.404
48 1.057 73 1.180 98 2.533
49 1.061 74 1.191 99 2.672
50 1.066 75 1.204 100 2.825
51 1.070 76 1.219
52 1.075 77 1.237
53 1.079 78 1.257
54 1.084 79 1.280
55 1.089 80 1.306
56 1.093 81 1.335
57 1.098 82 1.366
58 1.102 83 1.401
59 1.107 84 1.439