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If I'm converting feet to inches

Fri Mar 26, 2010 1:13 am

I'm trying to create as smaller scaled blueprint map of my bedroom and I'm stuck at the math part.

My conversion is 1ft is equal to 1in on the paper. I get that my 10ft wall is 10in on the paper. The part I got stuck at was when I came across a wall that 6' 2.5" and I realized how and what do I convert those inches. All I have is a basic ruler that has both inches (divied up into 16ths) and mm and cm on the other side. I'd appreciate any help!

Re: If I'm converting feet to inches

Wed Mar 31, 2010 1:04 am

LeahT wrote:I'm trying to create as smaller scaled blueprint map of my bedroom and I'm stuck at the math part.

My conversion is 1ft is equal to 1in on the paper. I get that my 10ft wall is 10in on the paper. The part I got stuck at was when I came across a wall that 6' 2.5" and I realized how and what do I convert those inches. All I have is a basic ruler that has both inches (divied up into 16ths) and mm and cm on the other side. I'd appreciate any help!


I hate working scale measurements with a standard 12" ruler, broken into 8ths or 16ths, for the reasons you're finding. It would make your project a lot easier if you go to an office supply store, such as Staples, Office Depot, etc., and purchase an Architect's Rule. This is a triangular 12" rule with 6 different scales, one of which is 1" broken into 12 inches, not 16ths. A plastic rule will cost around $3.

To use a standard 16ths ruler for feet and inches, divide only the inches by 12, multiply by 16, then add the result to the feet.

Using your 6' 2.5" as an example:
Ignoring the 6' momentarily, divide the inches by 12: 2.5" / 12 = 0.208333
As there are 16/16ths to the inch, multiply 0.208333 * 16 = 3.33 16ths of 1 inch, or 3 1/3 16ths. You'll have to guess at the 1/3 of a 16th
Add the 6' back, so your scale measurement will be 6 3/16"

Even if your measurement is in feet only, to insure accuracy, simply write the measurement adjacent to or on the line showing the wall. A linear scale is also recommended, because if you make copies, they are not usually 1:1 and the scale will be a little off.

More info

List of all units you can convert online
Metric conversion
Convert pounds to gallons
Convert grams to cups
Grams to milliliters
Imperial vs US Customary
History of measurement