"Mcewen, Brian T" wrote:

> The formula used to be well-known (but is easy to remember):
>
> Imperial Time X (.9941) = Metric Conversion
>
> It doesn't take into account any slowing down over the slightly longer
> distances, but it works for the:
>
> 440/400m, 880/800m, 1320/1200m, Mile/1600m, 2-mile/3200m, . . . 5
> mile/8000m, 6-mile/10000m,  etc., etc.
>

Actually the factor ought to be .9942 (400/(440x3x.3048).  The exact conversion
is obtained by Imperial Time/1.00584 = Metric Conversion.  440x3x.3048/400 =
1.00584.

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