Scale Calculator
Quick Overview:
This page is set up to allow you to work with a regular ruler and come up with scale sizes of things. For example, if you have an HO scale (1:87.1) box car that is 6 in. long, the program will convert that measurement to its actual size (43 ft. 641/64 in.) Conversely, if you know that your 1967 Chevy Impala is 16 ft. 2 in. long, you can find out it would be 17/32 in. long in N Scale (1:160).
Example:
You have a large O Scale (1:48) train layout with a 54 foot 1157/64 inch mainline run, and you want to know how long that is in real feet. Type in the 54 in the Scale Size (Model) section Feet box, 11 in the Inches box, and 57/64 in the Fraction box. Then choose [1:48  O] from the Scale box. Now, click on the Convert to Actual button and you'll see 2639 ft. 1113/16 in. appear in the Actual Size (Real World) section. This would make your O scale (1:48) mainline roughly 1/2 mile long.
Need More Help?
Specifics:
Actual Size (Real World):
This is the size something is in the real world (scale  1 ft:1 ft). Type in the feet, inches and fractions of an inch (in the form 1/8)
Scale Size (Model):
This is the size of your model in the real world (scale to be selected from the Scale list). Type in the feet and inches.
Fraction:
For inputing a fraction of an inch (ie. 1/2 or 3/32).
Scale:
Chose a scale from the list of available choices for your conversions. Included are all the scales listed by the NMRA (National Model Railroad Association).
Convert to Actual:
This button will convert the Scale Size (Model) to Actual Size (Real World) using the scale you have chosen from the Scale list. The default is N Scale (1:160).
Convert to Scale:
This button will convert the Actual Size (Real World) to Scale Size (Model) using the scale you have chosen from the Scale list. The default is N Scale (1:160).
Clear Boxes:
This button will clear out all of the Feet and Inches boxes and reset the scale to N Scale (1:160).
Print Page:
This button will send the entire page to the printer.
Railroad Scale Speed Calculator For Your LayOut.
Railroad Scale Speed Calculator
Welcome To My Model
Railroad Speed Calculator. This Is For Almost Any Scale Of RailRoad. 
 Select your Scale
 Select distance your consist has (or will) travel
 Use the timer, or enter number of seconds to travel this
distance
 Click the Calculate button

