by **areibel** » Tue Sep 13, 2011 9:44 am

Hello!

The conversions usually aren't too hard, are there certain plans you want to convert?

Converting feet and inches to metric (mm and cm) are easy, 25.4 mm is one inch. And there are 12 inches in one foot, so 304.8 mm is one foot. For example, if you look at a drawing and it's marked 9' 6" that is 9 feet and 6 inches- the single mark (') is for feet, double (") for inches. So to convert you take 9 feet times 304.8 (equals 2743.2 mm) PLUS 6 inches times 25.4 (152.4 mm) the total is 2895.6 mm. A TT model is 1:120, so divide 2895.6 by 120 and you get 24.13 mm, that's the size the model needs to be. Smaller numbers might just be in inches, like a freight car wheel. It will say 33", that's 33 inches or 838.2 mm after you convert, divide by 120 and it's just about 7 mm in TT scale (6.985 mm to be exact!)

I'm not sure where you live, but you might be able to find a good pocket calculator that will do the conversion automatically. My son has one that you can enter the size in feet and inches, push a button and it will give you the size in mm (or meters). If you have other questions just ask, we can help!