Because you cannot draw the actual size of a house, you must draw it to a smaller scale. This means assigning a smaller measurement to represent a larger measurement. In the U.S., a standard scale is ¼ inch represents 1 foot. This way, you can fit even the largest building on a piece of paper. Different countries have different units of measurement. In America, we use feet and inches, and most everywhere else in the world they use meters and centimeters. The way to write one foot and two inches on paper is 1'- 2". The way to write one meter and two centimeters is 1.02m. On this Web site, each square in your floor plan represents 3' by 3'.