imperial question - inch confusion

[Ken.thai]

Something that does my head in for a metric guy like myself is the imperial system.
Whole inches I can understand, but let's say a measurement in the plan says 1.7" - How do I get the correct measurement?
My ruler has 8 and 16 substeps like attached picture. It seems wrong to just count 1" and 7 substeps (or whatever its called) ? If the plan wrote 1" 7/8 I would get it, but I assume its not the same? Sorry, I iz confused

[JRPizza]

It's called decimal inches. We used them at Boeing and just have special rulers that have tenths and hundreds of an inch increments. Very common in machining too. You just need a better ruler . You can also do a web search for decimal to fraction conversion charts and go that way.

[Ken.thai]

It's called decimal inches. We used them at Boeing and just have special rulers that have tenths and hundreds of an inch increments. Very common in machining too. You just need a better ruler . You can also do a web search for decimal to fraction conversion charts and go that way.

Haha, alright I see - thanks for that information. I can't find one of those rulers here I reckon so I guess I will have to do a number crunch every time lol

[JRPizza]

Fortunately for most of the oven building there is very little difference between 1.7 and 1 3/4.