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Circle Rulers

Circle rulers are great tools for measuring circles. They come in various sizes and shapes, but they all have two things in common: they measure circles, and they are made of plastic. If you are looking for a cheap circle ruler, then you might not get what you pay for. We've compiled a list of the best circle rulers available online today, and we hope that you enjoy reading our review as much as we enjoyed writing it.

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Buyer's Guide

How to choose the
best circle rulers

What is the Purpose Of A Circle Rulers?

Circle rulers are useful tools for measuring circles. They allow you to measure distances around a circle. There are many different types of circle rulers available today. Some are designed specifically for drawing circles while others are meant for measuring angles. Most circle rulers include a center point which allows you to draw a perfect circle.

How To Use Circle Rulers

To use a circle ruler, hold it firmly between two fingers. Place the tip of the ruler where you wish to start the measurement. Then rotate the ruler clockwise until you reach the desired distance. Rotating the ruler counterclockwise will give you the opposite measurement. For example, if you wanted to measure 10 inches, you would begin rotating the ruler clockwise until you reached 10 inches. Once you've reached the correct distance, stop turning the ruler and mark the spot using a pen or pencil. Repeat this process for each side of the circle.

Types of Circle Rulers

There are several different types of circle rulers available today. Here are some examples:

Ruler - Used to measure straight lines.

Angle Ruler - Used to measure angles.

Tape Measurer - Used to measure lengths.

Dial Gauge - Used to measure diameters.

Dot Grid - Used to measure areas.

Circles & Squares - Used to measure circular objects.

Drawing Tools - Used to draw circles.

Compass - Used to determine direction.

Calculator - Used to calculate circumference.

Measuring Tape - Used to measure length.

Pencil Sharpener - Used to sharpen pencils.

Pens - Used to write.

Scissors - Used to cut paper.

Stapler - Used to staple paper together.

Tweezers - Used to remove lint from clothing.

Washcloth - Used to wash clothes.

Wood Chisel - Used to carve wood.

The Importance of Purchasing Quality Circle Rulers

Circle rulers are essential tools for anyone who needs to draw circles. Whether you are drawing circles around objects or measuring distances between two points, circle rulers are indispensable. There are many different types of circle rulers available today. Some are designed specifically for artists while others are meant for engineers and architects. Regardless of which type you decide to purchase, there are several features that you must be aware of before making your decision.

Features To Look For

There are three main categories of circle rulers; those that measure angles, those that measure diameters, and those that measure both diameter and angle. Angles are measured using protractors, compass, and dividers. Diameters are measured using calipers, micrometer, and dial indicators. Both diameter and angle measurements require special instruments called goniometers. Goniometers allow you to measure angles and diameters simultaneously.

Types of Circle Rulers

Rulers are generally divided into four categories based on the size of the ruler. Small circle rulers measure approximately 1 inch (2.5 cm) in diameter. Medium circle rulers measure 2 inches (5cm). Large circle rulers measure 3 inches (7.6 cm), and extra large circle rulers measure 4 inches (10 cm). Each category has its own advantages and disadvantages. For example, small circle rulers are easy to carry around and store away. However, they are difficult to read due to their smaller scale. Medium circle rulers are easier to read and hold larger amounts of information. Extra large circle rulers are ideal for professionals who need to take accurate measurements. They are very durable and can withstand heavy loads.

How To Use Them

Once you've chosen the right type of circle ruler for your application, you must learn how to use it correctly. First, set the correct measurement unit. Most circle rulers include metric units as well as imperial units. Next, align the center line of the ruler with the object being measured. Finally, press firmly on the ruler and rotate it clockwise until the desired number appears on the face of the ruler. Once you've completed these steps, you can begin taking precise measurements.

Where To Purchase Circle Rulers

While most manufacturers sell circle rulers online, you may find it cheaper to purchase them locally. Many hardware stores and department stores carry circle rulers. Online retailers typically charge higher prices for circle rulers compared to local retailers. However, you may find that the convenience of shopping online outweighs the price savings.


Features To Look For When Buying A Circle Rulers

Circle rulers are essential tools for anyone who needs to measure angles, circles, arcs, etc. There are many different types of circle rulers available today. Some are designed specifically for measuring circles while others are general purpose instruments. Here we’ll discuss some features to look for when purchasing a circle ruler.


The size of the circle ruler determines its usefulness. Most circle ruesters are between 1/4 inch (6 mm) and 3 inches (76mm). However, there are larger models available too. Larger circle rulers are useful for making large measurements. Smaller ones are ideal for smaller jobs. Remember that the larger the radius of the circle being measured, the longer the ruler must be.


There are two main materials used to manufacture circle rulers – plastic and metal. Plastic circle rulers are lighter weight and cheaper than metal ones. Metal circle rulers are stronger and last longer. Both types of circle rulers are suitable for most applications. But remember that metal circle rulers are heavier and harder to hold steady during long periods of measurement. So if you plan to take frequent readings, opt for a plastic circle ruler.


Most circle rulers are accurate enough for most purposes. However, accuracy varies depending on the type of material used. Plastic circle rulers are generally more accurate than metal ones. Because plastic has fewer internal stresses, it tends to remain flat and true throughout the length of the ruler. While metal circle rulers are typically manufactured using high precision manufacturing techniques which result in greater accuracy. As a rule of thumb, metal circle rulers are more accurate than plastic ones.


Plastic circle rulers are easier to maintain than metal ones. They are also more likely to survive rough handling. Metal circle rulers are tougher and more durable. They are also more resistant to corrosion. So if you intend to leave your circle ruler outside where it will be exposed to moisture, humidity, dust, dirt, etc., go for a metal circle ruler.


As mentioned earlier, price depends on the type of circle ruler you select. Generally speaking, the higher quality the circle ruler, the pricier it will be. So if you are planning to invest in a good quality circle ruler, expect to pay more money. However, if you are willing to compromise on quality for lower prices, you can still find plenty of options.

Circle rulers are very useful tools for measuring circles. There are many different kinds of circle rulers available today. Some are designed specifically for drawing circles while others are meant for general usage. Here we discuss three common types of circle rulers.

Drawing Circle Ruler

This type of ruler has two parallel lines which intersect each other at right angles. One line represents the diameter of the circle being measured and the other line indicates the radius of the circle. To measure a circle using this kind of ruler, draw a straight edge along the diameter line and mark the point where the radius meets the diameter line. Then connect these points together to form a perfect circle.

General Use Circle Ruler

These rulers are generally used for measuring circular objects. Most of these rulers are made of plastic material and have a large scale marked on its face. For example, there could be 100 mm (4 inches) written on the face of the ruler. Such rulers are commonly found in hardware stores and departmental stores. However, most of these rulers are too small to be able to measure larger circles.

Ruler With Scale

The last category of circle rulers includes those with scales. These rulers are ideal for measuring larger circles. Usually, these rulers include a set of numbers printed on its face. For instance, there could be 1 inch, 2 inches, 3 inches etc. written on the face of the ruler. Using these rulers, you can measure circles with diameters ranging between 1 inch and 10 feet.

How to Measure Circles

To measure a circle, start by marking the center of the circle. Mark the center by placing a pencil dot at the intersection of the diameter line and the radius line. Next, extend the radius line outward from the center. Draw another arc connecting the endpoints of the radius line. Now, trace around the circumference of the circle with a pen or pencil. Finally, divide the length of the traced circle into equal parts. Each part corresponds to a number on the ruler. Thus, the distance between the center and the outermost point of the circle equals the diameter of the circle.

There are many different types of circle rulers available today. Depending upon your needs, you can select the

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