Best Protractors & Set Squares of 2025

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Protractors and set squares are essential tools for anyone working in the field of mathematics or engineering. These precision instruments are used to accurately measure angles and distances, allowing for precise calculations and designs. Whether you're a student, a professional, or a hobbyist, having high-quality protractors and set squares can greatly improve the accuracy and efficiency of your work. With a variety of sizes and materials available, there is a protractor and set square to suit every need.
At a Glance: Our Top Picks
Top 10 Protractors & Set Squares
Helix R36011 Oxford 31cm Set Squares
The Helix Oxford Set Squares are essential tools for precision in your measuring tasks. With a 31cm size and angles of 45 and 60 degrees, they allow you to draw accurate angles easily. The tinted blue design enhances clarity, making it simple for you to read the markings. The single colour print ensures that you can focus on your work without distraction. Additionally, the inclusion of both metric and imperial graduations guarantees that you can measure accurately, no matter your preference.
Helix Oxford 15cm Geometry Set with Protractor
The Helix Oxford Geometry Set is an essential tool for anyone needing accuracy in their measurements. It includes a 15cm ruler, perfect for precise lengths, and a 180-degree protractor to assist you in drawing perfect angles. The set squares, featuring 45 and 60 degrees, help you create accurate shapes and designs. With both metric and imperial graduations, you can easily switch between measurement systems, making it convenient for various projects.
SZXMDKH 10-Pack Clear Plastic Protractors
The SZXMDKH Plastic Protractors are designed for easy angle measurement in your studies. Made from high-quality plastic, their transparent colour allows you to see the numbers and patterns on your paper clearly, which enhances accuracy. The smooth surface ensures effortless movement across your work, making it easier to position your protractor. Additionally, the clear scale with marking lines at 10° intervals helps you to draw precise angles, streamlining your mathematical tasks.
Ashton and Wright Lightweight 180 Degree Protractors
The Ashton and Wright Protractors are lightweight and durable, making them ideal for classroom use. Their slim design ensures easy handling, while the clear markings allow for precise angle measurements, helping you achieve accuracy in your work. The protractors feature smooth edges, which provide safety and comfort, especially for children. With both ascending and descending degree markings, you can easily measure a range of angles, making these protractors a valuable tool for learning and creativity.
Westcott 22 cm Transparent Set Square
The Westcott Set Square is a versatile tool perfect for your drawing and measuring needs. With a large hypotenuse of approximately 23 cm, it allows you to draw and measure angles, perpendiculars, and plumb lines with ease. The clear scale divisions in millimetres and special markings for common angles make it easy for you to achieve precise results. Additionally, the eye-catching red angle scale enhances readability, ensuring you can work efficiently on your technical drawings.
360 Degree Protractor Set for Students
The MEKEET Protractor Set is a practical tool for students and professionals alike. Crafted from high-quality plastic, its durable design ensures that the indelible black and red scales remain clear over time. You will appreciate the convenience of having two protractors in various colours for your work and study needs. Measuring 10cm, this compact protractor is easy to carry and fits perfectly in your pencil case. Its transparent design and built-in scale make measurements straightforward and reading effortless.
Helix Protractor 10cm 180 Degree (Box of 50)
The Helix 180 Degree Protractor comes in a bulk pack of 50, making it ideal for schools or offices. Its clear material allows for easy reading and accurate measurements, so you can achieve precise angles every time. The reversed scale is particularly useful for those working on complex designs, helping you to avoid any confusion when measuring. With multiple protractors in one box, you can ensure that you always have one on hand when you need it.
Westcott E-10304 Transparent Math Set (Pack of 4)
The Westcott E-10304 Math Set is a versatile collection that includes four essential tools for your mathematical needs. The transparent plastic design allows for clear visibility, making it easier to align your measurements accurately. The 12-inch ruler is perfect for drawing straight lines and measuring lengths, while the 45° and 60° set squares aid in creating precise angles for your drawings. Additionally, the 15cm protractor enables you to measure and draw angles with confidence, ensuring your work is neat and professional.
10Pcs Clear 180 Degrees Protractor Set
The XXLKVSK Protractor Set includes 10 clear 180-degree protractors, each measuring 10.2cm by 5.6cm. Made from high-quality, durable plastic, these protractors ensure long-lasting use without bending or breaking. You will appreciate the smooth surface that glides easily on paper, making it a breeze to measure angles accurately. The clear black numbers are easy to read, with dedicated markers every 5 and 10 degrees, allowing you to achieve precise measurements in your projects.
Mebamce 3 Pack Clear Plastic Protractors
The Mebamce Plastic Protractors are designed for accuracy and ease of use. Their clear and precise scales allow you to measure angles effortlessly, with lines marked for every 10 degrees. Being made from high-quality plastic, they are lightweight and portable, making them perfect for students and professionals alike. The transparent design ensures that measuring and reading angles is straightforward, enhancing your efficiency whether in the classroom or at work.
Frequently Asked Questions (FAQs)
1. What is a set square used for?
A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline.
2. What is set square scale?
Set Squares - Technical Drafting Rulers are combination of 8" and 10" professional triangles made of clear plastic . Set Squares are used in conjunction with straightedge of drawing board to draw accurate angles. Thickness - 2.9 mm Markings on both side in mm/inch.
3. What is the shape of set squares?
Set squares, in the shape of right-angled isosceles triangles, are more than just a common tool in geometry class: they are also frequently used in the field of technical drawing.
During our protractors & set square research, we found 306 protractors & set square products and shortlisted 10 quality products. We collected and analyzed 13,150 customer reviews through our big data system to write the protractors & set squares list. We found that most customers choose protractors & set squares with an average price of £4.15.
The protractors & set squares are available for purchase. We have researched hundreds of brands and picked the top brands of protractors & set squares, including Helix, SZXMDKH, Ashton and Wright, Westcott, MEKEET.

Jordan Akthar owns one stationery store in Bradford, and another in Derby. He started with a corner bookshop, and now the rest is history. He is often found in his stores taking count of inventories of books and stationery. Jordan also likes to write, and this drove his passion for writing articles on stationery maintenance. He owns a blog, where in his free time, he would write DIY tips on how you can recycle and refine your stationeries.