1/8th mile to 1/4 mile calculator?

[true blue blood]

Whats the number to multiply your 1/8th mile by to get 1/4 mile?

 

[Slapyo]

1/4 Mile ET = (1/8 Mile ET + .22) / .655
1/8 Mile ET = (1/4 Mile ET * .655) - .22

got that from http://www.tciauto.com/tech_info/calculators.htm#3

 

[Slapyo]

1/4 mile ET = 1/8 mile ET x 1.5832
1/8 mile ET = 1/4 mile ET / 1.5832

i just found these on http://www.prestage.com/Car+Math/Car+Math+Formulas/default.aspx

couple different forumlas, comes out a bit different. when i convert my 14.52 i get:

9.29 from the formula in my post above
9.17 from the formula in this post

 

[JonJon]

I always read it was ~ 1/8 * 1.55 = 1/4
either way, they're guesses

 

[mustangdaren]

here you go. i have a conversion chart on my clubs website http://www.xtrememustangs.com/id24.html

 

[true blue blood]

Thanks everyone