Scale rulers also allow you to use the HO plans in model magazines, for example, to build O scale items. Measure the length on the HO plan using the HO ruler. Then, transfer that number of actual feet and inches to your work using the O scale ruler.
Many scale rulers come with multiple scales for this purpose.
When you get used to using the scale ruler, you will find yourself thinking in terms of scale feet and inches instead of actual inches. You will be thinking, let me cut that scale 2x4 to 4'6" in length instead of to 1-1/8".
Also, if you want accurate dimensions, stay away from the downloadable versions that you print out yourself. They are OK for rough estimates, but you can't beat a good metal scale ruler with multiple scales if you intend to do any amount of model building.
You can go to Staples and buy a three sided plastic ruler used for Engineering. It will have aregular scale in inches and also 1/8, 3/16. 1/4. 3/8 and 1/2" per foot graduated scales on it.It is a relatively cheap item to purchase and you will be all set.
Originally posted by dkdkrd: One point, though...HO is not 1/8" to the foot in scale. It's close. But 3.5mm to the foot is the more precise definition of HO scale as employed by most quality manufacturers. That will be a subtle difference found in model railroad scale rules but not on an architectural rule.
Exactly, O is 6.35mm to the foot, learn to work in millimeters and you only need one ruler.
So I bought this SS scale ruler off eBay. Looking forward to scratch building trestles, buildings etc...
MODEL RAILROAD STAINLESS STEEL FLEXIBLE TEMPLATE RULER, ETCHED in SCALE GRADIATION for MODELING.
Ideal item to quickly verify the size of all types of lumber and small plastic stock.
Convert Drill sizes and direct measure in Scale feet.
A Necessary Addition to HO or N Scale or O Scale LAYOUT for Quicly and Acccurately Sizing Scale Lumber and dimensions in scale feet directly off the Etched Gradiants without having to do conversions.
Slotted Ruler Template etched into the steel in HO Scale, O Scale and N Scale foot dimension allowing you to simply read the scale foot length directly off the ruler.
A must for making Quality Scale Models.
12 inch Gradiated Ruler Flexible Stainless Steel Front Side features HO Scale foot measure from 1 to 86 scale feet O Scale foot measure from 1 to 47 scale feet S Scale foot measure from 1 to 64 scale feet
Back Side Features N Scale foot measure from 1 to 80 Scale feet 1/64th inch measure from 1 to 5 inches by 64th of an inch Millimeter measure from 1 to 100 millimeters Screw, Tap and Drill sizing Chart from 11-90 to 6-32 Decimal Equivalent Chart for Numbered Drill Bits Bit size displayed from #1 to #80 bit Good impact resistance Can be used to Check parts dimensions