Translating lengths into time

[SniperSB23]

Originally Posted by rocknrowl

I have a newbie question.

Is there a rule of thumb when translating how far back a horse is in lengths to time?
For example if a horse A is 2 lengths back at the first call and then 1 length back at the second call and it takes the leaders 24 seconds what time did horse A run the distance in?

I use 6 lengths = 1 second some use 5 lengths = 1 second. So that horse would have gone in roughly 23 4/5ths.