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Central
VA - Railroad Research
Study
guide:
Railroads -
Trains
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Trains, Model
Railroads
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Scale to Scale
The following conversion chart is a quick reference for changing
scales. To convert from one scale to another, look up the scale
you are at across the top and read down until the row is the scale
you want. This is your multiplier. For example, to convert
measurements taken from an S scale drawing to N scale, look across
the top row for S and down to the N row to get 0.400. Multiply the
S dimension by 0.4 to get the N scale measure.
Read the chart as: FROM [top row] TO [left
column]
| . |
F (1:20.3) |
G (1:22.5) |
#1 (1:32) |
O (1:48) |
S (1:64) |
HO (1:87.1) |
TT (1:120) |
N (1:160) |
Z (1:220) |
| F |
1.000 |
1.108 |
1.576 |
2.365 |
3.153 |
4.291 |
5.911 |
7.882 |
10.837 |
| G |
0.902 |
1.000 |
1.422 |
2.133 |
2.844 |
3.871 |
5.333 |
7.111 |
9.778 |
| #1 |
0.634 |
0.703 |
1.000 |
1.500 |
2.000 |
2.722 |
3.750 |
5.000 |
6.875 |
| O |
0.423 |
0.469 |
0.667 |
1.000 |
1.333 |
1.815 |
2.500 |
3.333 |
4.583 |
| S |
0.317 |
0.352 |
0.500 |
0.750 |
1.000 |
1.361 |
1.875 |
2.500 |
3.438 |
| HO |
0.233 |
0.258 |
0.367 |
0.551 |
0.735 |
1.000 |
1.378 |
1.837 |
2.526 |
| TT |
0.169 |
0.188 |
0.267 |
0.400 |
0.533 |
0.726 |
1.000 |
1.333 |
1.833 |
| N |
0.127 |
0.141 |
0.200 |
0.300 |
0.400 |
0.544 |
0.750 |
1.000 |
1.375 |
| Z |
0.092 |
0.102 |
0.145 |
0.218 |
0.291 |
0.396 |
0.545 |
0.727 |
1.000 |
Inches to Scale
Dimensions
The following conversion charts are set up to measure from real
world increments to scale increments. Rather than convert 5 scale
inches to some number, I chose to use whole numbers that could be
measured with a ruler or calipers and let the scale inches fall
where they might. If you look up 5 scale inches and find only
4.996 and 5.015, you know that the dimension you set is either a
bit over or a bit under and the actual dimension is in between
those two settings. I just find it faster to set up to known marks
on the ruler or caliper. If you need a chart that goes the other
way, so you can look up 5 scale inches and get .057405281 (HO
scale), it is probably easier to just use a calculator for that
kind of conversion (5 div by 87.1 = .0574...).
The tables are set up as Excel spreadsheets (.xls format) or as
tab delimited text. The text should set up in columns in your word
processor. I set them up to fit on standard 8.5 x 11 in. paper,
used a narrow font, and set the first tab as a right justified tab
followed by a regular left justified tab real close to the first
tab. The rest of the tabs should then align the columns correctly.
You may have to fiddle with the tabs to get it to look right,
switch to a smaller font size, or use a percentage while printing
to reduce it a bit. Printing in landscape (horizontal) mode may
work well too if you want to use a larger font. If you have a
spreadsheet that can read in text files, the setup will be a lot
easier to do. Any word processor should work ok.
Some of the files are in multiple formats. These are the ones
that I created for myself as the need arose.
Format 1 is to convert proto inches
to scale inches, in a two column format. This is the easiest
format to store and read the info from.
Format 2 is the same information in a
single column, if you want to format it yourself another way or
print on a dot matrix printer.
Format B is for smaller increments of
conversion, to 2.65 scale inches (in N scale.)
Format C is in 0.001 increments, with
the scale equivalents in inches and feet.
Z SCALE (1:220)
N SCALE (1:160)
HO SCALE (1:87.1)
S SCALE (1:64)
O SCALE (1:48)
G SCALE (1:22.5)
F SCALE (1:20.3)
#1 SCALE (1:32)
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JP Cohen Publishing, JP
Cohen Enterprises, are owned in whole by JP Cohen, Sandston VA, 23150
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JPCohen's U. S.
Postal Research Page is a web site by JPCohen. Copyright ©
2000 - 2009 jpcohen
publishing. All Rights Reserved.
All other copyrights are that of their owners and I stake no claims
to them.
Contact me at joe.cohen@rvv.com
 ;
last updated:02/07/11.
APS
member number 210296.
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