# How do architectural scales work?

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An Architect’s or scale ruler is designed for use in determining the actual dimensions of a distance on a scaled drawing. … For example, 1/8 on the ruler is in fact a scale that converts 1/8 inch on the drawing to 1 foot. This would represent a drawing with a scale of 1/8″ = 1 foot.

## How do you read scales on architectural drawings?

Architect scales have numbers that run incrementally both from left to right and from right to left. A whole number or fraction to the left or right of the number line indicates the scale those numbers represent. Engineer scales have numbers that run incrementally from left to right.

## How do architects use scale factor?

If a plan was drawn full scale, or 1 to 1, the paper would be too big for a contractor to use or an architect to produce. Most floor plans are drawn so 1/8 or 1/4 inch on paper equals 1 foot in reality. This makes the average door, which is 3-feet wide, show as 3/8- or 3/4-inch wide in the drawing.

## How is architectural scale calculated?

Set the ratio as the size of the design on the paper to the size of the design in real life. In the example, 1.5 feet to 40 feet. Evaluate the ratio to find the scale. In the example, 1.5 feet divided by 40 feet equals 0.0375, so the scale of the object is 0.0375 to 1.0.

## Why does an architectural scale have so many scales?

Because the scale of such drawings are often smaller than life-size, an architect’s scale features multiple units of length and proportional length increments. For accuracy and longevity, the material used should be dimensionally stable and durable.

## What is the most common architectural scale?

The 1/4 inch = 1 foot scale is the most common in the U.S. and is also referred to as 1/48 size because there are 48 units of 1/4 inch in 12 inches. Shown below are two different U.S. customary scales. The 1/4 inch scale on the left indicates that for every 0.25 inches measured there is 1 foot of real distance.

## Is the scale 1/25 an architectural scale or an engineering scale?

Engineering scales are read left to right, and should have scales of 1:20, 1:25, 1:50, 1:75, 1:100 and 1:125. Architectural scales can be read both left to right, and right to left, and are likely to be labeled with 3/32, 3/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1-1/2, 3 and 16 scales.

## What is the appropriate scale for plot plan?

The Unit Plot Plan is usually drawn to small scale, such as 1″=10′, 1″=20′, or 1″=30′.

## What is a 1/4 inch scale?

A 1/4″ scale means that each 1/4″ (inch) on the plan counts for 1′ (feet) of actual physical length. To scale a blueprint in imperial units to actual feet. multiply the measurement on the drawing (in inches decimal equivalent) with the denominator.

## How do you read architectural measurements?

How to Read an Architecture Ruler

1. Lay out the blueprint or drawing that you want to read with the architectural ruler.
2. Locate the scale on the drawing or blueprint. …
3. Locate the corresponding scale on the architectural ruler, i.e. 1/4″ = 1′ (1/4 inch = 1 foot).
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## What does a 1/100 scale mean?

Ratio scales

If the scale of the plan is 1 : 100, this means the real measurements are 100 times longer than they are on the plan. So 1 cm on the plan represents a real length of 100 cm (1 metre)