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Original Message
 Author: Why don't you Subject: RE: How long is the outside lane of a 400m track?

Message:
use the search function. We ended up having a very in depth discussion a couple of months ago.

The formula you want to use to get the closest approximation to the distance is:

D = 400 + (400-2S)*pi*w*(L-1)

D is the Distance in lane L
S is the length of the straight
w is the width of the lane (1.22m on a standard track, as per IAAF regulations, I think 1.21m and 1.23m are also acceptable).

Remember to use a measurement for the length of the straight that has at least as many significant figures as the lane width eg 96.7m if using 1.22m width etc

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