SCALE command in AutoCAD - Step-by-Step Guide

Introduction

The SCALE command in AutoCAD lets you resize objects bigger or smaller. This helps when you need to adjust drawings to fit a specific size or scale without redrawing everything.

When you want to make a floor plan twice as big to fit a larger paper size

When you need to shrink a mechanical part drawing to fit on a presentation slide

When you want to match the size of a new object to existing objects in your drawing

When you receive a drawing in the wrong scale and need to correct it

When you want to create a smaller version of a design for a quick overview

Steps

Step 1: Click

- Home tab > Modify panel > Scale button

Command line shows SCALE prompt asking to select objects

💡 You can also type SCALE and press Enter to start the command

Step 2: Select

- Drawing area

Selected objects highlight and command line asks for base point

💡 Select all objects you want to resize in one go

Step 3: Click

- Drawing area to pick base point

Base point is set; command line asks for scale factor

💡 Choose a base point that stays fixed while scaling

Step 4: Type

- Command line

Objects resize according to the scale factor entered

💡 Enter a number greater than 1 to enlarge, less than 1 to shrink

Before vs After

Before

A rectangle is 10 units wide and 5 units tall

After

After scaling by 2 with base point at bottom-left corner, the rectangle is 20 units wide and 10 units tall

Settings Reference

Base Point

📍 During SCALE command prompt

The fixed point around which the object scales

Default: Point clicked by user

Scale Factor

📍 During SCALE command prompt

Determines how much the object size changes

Default: 1 (no change)

Common Mistakes

Choosing a base point in the middle of the object

The object will scale outward from the center, which may move it unexpectedly

Pick a base point at a corner or fixed reference point to keep the object positioned as desired

Entering a scale factor of 0 or negative number

Scale factor must be positive; zero or negative values cause errors or unexpected results

Always enter a positive number greater than zero

Summary

The SCALE command resizes objects by a chosen scale factor around a base point

Use a base point that keeps your object positioned correctly after scaling

Enter a positive scale factor: greater than 1 to enlarge, less than 1 to shrink

Practice

1.

What does the SCALE command do in AutoCAD?

easy

A. Changes the size of an object by a scale factor

B. Rotates an object around a point

C. Moves an object to a new location

D. Deletes an object from the drawing

Solution

1. Step 1: Understand the purpose of SCALE command

   The SCALE command is used to change the size of objects in AutoCAD by applying a scale factor.

2. Step 2: Compare with other commands

   Rotation changes orientation, Move changes position, Delete removes objects. Only SCALE changes size.

3. Final Answer:

   Changes the size of an object by a scale factor -> Option A

4. Quick Check:

   SCALE changes size = A [OK]

Hint: SCALE changes size, not position or rotation [OK]

Common Mistakes:

• Confusing SCALE with MOVE or ROTATE
• Thinking SCALE deletes objects
• Assuming SCALE changes object color

2.

Which of the following is the correct syntax to start the SCALE command in AutoCAD?

SCALE

easy

A. Type SCL and press Enter

B. Type SCAL and press Enter

C. Type S and press Enter

D. Type SCALE and press Enter

Solution

1. Step 1: Recall the exact command name

   The correct command to scale objects is SCALE.

2. Step 2: Verify command abbreviations

   AutoCAD does not recognize SCL, SCAL, or S as SCALE command shortcuts.

3. Final Answer:

   Type SCALE and press Enter -> Option D

4. Quick Check:

   Correct command name = C [OK]

Hint: Use full command SCALE to avoid errors [OK]

Common Mistakes:

• Using incomplete command names
• Assuming abbreviations work without confirmation
• Typing commands with typos

3.

You select a square with side length 10 units and use the SCALE command with a scale factor of 0.5 and base point at one corner. What will be the new side length?

medium

A. 10 units

B. 5 units

C. 15 units

D. 20 units

Solution

1. Step 1: Understand scale factor effect

   A scale factor less than 1 reduces size proportionally. Here, 0.5 halves the size.

2. Step 2: Calculate new side length

   Original side length 10 units x 0.5 = 5 units.

3. Final Answer:

   5 units -> Option B

4. Quick Check:

   10 x 0.5 = 5 [OK]

Hint: Multiply original size by scale factor [OK]

Common Mistakes:

• Using scale factor as additive instead of multiplicative
• Ignoring base point effect on size
• Confusing scale factor greater than 1 with reduction

4.

What is wrong with this sequence when using the SCALE command?
SCALE -> Select object -> Specify base point -> Enter scale factor as 0 -> Press Enter

medium

A. Scale factor cannot be zero

B. Base point must be at origin

C. Object must be selected after scale factor

D. Scale factor must be negative

Solution

1. Step 1: Check scale factor validity

   Scale factor zero means object size becomes zero, which is invalid in AutoCAD.

2. Step 2: Review other options

   Base point can be anywhere, object selection order is correct, scale factor must be positive (not negative).

3. Final Answer:

   Scale factor cannot be zero -> Option A

4. Quick Check:

   Scale factor > 0 required = A [OK]

Hint: Scale factor must be positive and not zero [OK]

Common Mistakes:

• Using zero or negative scale factors
• Assuming base point must be origin
• Selecting objects after scale factor

5.

You want to enlarge a circle by 150% but keep its center fixed. Which steps correctly use the SCALE command?

Choose the correct sequence:

1. Select the circle
2. Specify base point
3. Enter scale factor

hard

A. Select circle -> Specify any point as base point -> Enter 1.5 as scale factor

B. Select circle -> Specify any point as base point -> Enter 0.5 as scale factor

C. Select circle -> Specify center as base point -> Enter 1.5 as scale factor

D. Select circle -> Specify center as base point -> Enter 0.5 as scale factor

Solution

1. Step 1: Identify base point to keep fixed

   To keep the circle center fixed, specify the center as the base point.

2. Step 2: Use correct scale factor for enlargement

   150% enlargement means scale factor 1.5 (greater than 1).

3. Final Answer:

   Select circle -> Specify center as base point -> Enter 1.5 as scale factor -> Option C

4. Quick Check:

   Center fixed + scale 1.5 = D [OK]

Hint: Use center as base point and scale >1 to enlarge [OK]

Common Mistakes:

• Using scale factor less than 1 to enlarge
• Choosing wrong base point causing shift
• Confusing scale factor percentage with decimal