# How to use an architect's scale ruler

Written by heather orr
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Scale rulers are used by architects and engineers to calculate dimension in a blue print or building plan without the use of time-consuming and complicated math equations.

Skill level:
Easy

### Things you need

• blue prints or building plans, scale ruler

## Instructions

1. 1

Determine the scale of your plans. It will be labelled on the plans and should be found in the bottom corner.

2. 2

Turn the ruler to the corresponding scale factor. For instance, if the plans read ¼ inch equals one foot, you will use the ¼ inch scale on the ruler.

3. 3

Measure the desired line starting from zero on the correct scale. In this case, you would need to use the ¼ inch scale.

4. 4

The measurement you calculate equals how many feet the line actually is at full scale dimensions.

5. 5

Try it out several times until you get the hang of it. This will increase your understanding of the scale ruler so you can use it with ease.

#### Tips and warnings

• Be sure you are using the correct scale on the ruler. If you use the wrong scale on the ruler, all your measurements will be incorrect.

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