Our kits use scale feet for the dimensions.  Here's how to convert the scale feet to inches. 

Let say the kit shows 20 X 30 as the size.  This is scale feet.  To get inches from this take lets start with the first number 20.  Take 20 times 12 ( which is how many inches there is in a foot)  20 X 12 = 240.  Take the 240 and divide by 87 ( for HO Scale ) and you get 2.758. That's right at 2-3/4 inches. Then take the 30 ( of the 20 X 30 ) and do the same thing.  30 X 12 = 360, then 360 divided by 87 (HO) which equals 4.137 Which is a little over 4-1/8 inch.  So the kit would be 2-3/4  X 4-1/8 inches.  

 

For N Scale divide by 160.  So the 20 X 30 kit in N Scale would be 20 X 12 = 240, 240 divided by 160 would be 1.5 or 1-1/2 inches. Then the 30 X 12 = 360, 360 divided by 160 equals 2.250 or 2-1/4 inches. The kit in N Scale would be 1-1/2  X 2-1/4 inches.

Hope that helps.

Rick

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