Shop protractors for drafting, technical drawing, geometry, classroom use, layout work, and angle measurement. This category includes clear plastic protractors, semicircular protractors, circular protractors, protractor rulers, swing arm protractors, and angle measuring tools for students, artists, engineers, and drafting users.
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6" Protractor Ruler - 20 & 40 Parts to Inch
Westcott$3.60Combination protractor/scale/ruler for fast preliminary layouts. Graduations designed for civil engineers, surveyors, and general use. Features: 180 degree protractor with 20ths and 40ths to the inch scalesTransparent plasticLaminated... -
6" Academic Semicircular Protractor
Alvin Drafting$2.50The 180° semi-circle academic protractor features a center cutout and finely beveled edges, allowing for effortless lifting and maneuvering, making writing and drawing straightforward and convenient. Constructed from durable 0.08-inch thick... -
10" Semi-Circle Protractor with Circle Cutout
Pacific Arc$7.50Professional Protractors made from pure clear acrylic to ensure long life and value. Graduations are etched onto the surface to prevent wearing off. Individually poly-wrapped. -
6" Protractor Ruler - 10 & 50 Parts to Inch
Westcott$4.00Thin plastic combination protractor/scale/ruler for fast preliminary layouts. Features:Graduations designed for civil engineers, surveyors, and general use.180 degree protractor6" rulerInch in 10ths/50ths -
12" Protractor Ruler
Art Alternatives$4.30Ideal for drafting, design, mathematics and fine art projects, this 12" light-weight, ruler features a 180º protractor for precise angles, scales in both inch and centimeter calibrations and 1/8" and 1/4" architectural scales. The ruler divided into... -
3.5" Mini Protractor
Alvin & Co.$0.95The Alvin Mini Protractor , measuring three and ½ inches, is a portable tool for measuring angles and circles.Features: Size: 3 ½ inchesGraduations clearly divided into 1° incrementsWith cut-out center for easy handlingColor: Clear -
6" Protractor Ruler
Westcott$2.10This transparent 180 protractor ruler has scales in both 1/16" and centimeter calibrations. The SW-51 also has 45 and 60 triangle cut-outs plus a French curve symbol. Features: Transparent 180* protractor ruler45* and 60* triangle cut outs plus French... -
6" Protractor Ruler - 10 & 20 Parts to Inch
Westcott$3.60Combination protractor/scale/ruler for fast preliminary layouts. Graduations designed for civil engineers, surveyors, and general use.Features: 10 & 20 Parts to Inch180 degree protractor with tenths and 20ths to the inch scalesTransparent... -
6" Protractor Ruler-1764364609
Westcott$2.40Westcott 6"/15cm Protractor Ruler 180° protractor ruler has 8ths graph, 16ths to the inch and centimeter scales. It is laminated for durability and features a translucent color to allow for viewing through to the page. Westcott Drafting & Drawing Tools... -
6" Swing Arm Protractor
Helix$2.90This 6" protractor features a swing arm for precise measuring of angles. A go-to tool for students, draftsmen and engineers.Features: Integrated arm helps draw accurate anglesBeveled edge for better accuracyTransparent plastic for easy measuringSturdy,... -
8" Semicircular Protractor
Alvin Drafting$3.80The 180° semi-circular protractor features a center cutout and finely beveled edges, allowing for effortless lifting and maneuvering, making writing and drawing straightforward and convenient. Constructed from durable 0.08-inch thick polystyrene, this... -
Angle and Circle Maker
Helix$5.60This circular protractor rotates freely, enabling you to draw angles like a protractor and circles like a compass. The center disc includes slots for drawing angles up to 360° and holes for creating circles ranging from 1/8" to 4" in diameter... -
C-THRU 7" Goniometer Quick Angle Protractor Measuring Tool
Westcott$6.35Quick Angle Protractor with 7" Rotating Arms – Measure Angles with Precision This Quick Angle Protractor features 7" arms that rotate around the center scale, allowing for fast and accurate angle measurements. The arms open up to 12" wide and include... -
Circular Protractors
Alvin Drafting$2.50 - $6.80The 360° protractor with a center cutout and finely beveled edges is designed for easy lifting and maneuvering, making writing and drawing simple and convenient. Made of durable 0.08-inch thick polystyrene, this protractor boasts long-lasting,... -
Circular Protractors - 360 Degree
Pacific Arc$2.20 - $5.90Professional Protractors made from pure clear acrylic to ensure long life and value. Graduations are etched onto the surface to prevent wearing off. Individually poly-wrapped. 360 degrees: 4", 6", 8" -
College Combination Set
Staedtler$7.40Some of Staedtlers's most popular tools all in one set! These tinted plastic tools all have inking edges. 4-Piece Set Includes: 12" ruler 6" 45°/90° triangle 8" 30°/60° triangle 6" 180° protractor -
Mini Protractor
Timely Templates$1.20This pocket-size protractor has 1° graduation clearly printed on .020 matte surface green vinyl. This material is tough and flexible. -
Plastic Math Set
Staedtler$2.60Stay prepared for math class with this essential 4-piece set, which includes a 6-inch ruler, a 4-inch protractor, a 45-degree triangle, and a 30/60-degree triangle. The transparent design of the pieces allows items to show through for enhanced precision... -
Protractor
Timely Templates$1.80Made of green, transparent vinyl, this precision protractor is tough and flexible. It will not break. -
Quarter Protractor
Timely Templates$3.10It's all you really need. Features: 3", 4", 6", 8" and 10" protractors are combined into one compact pieceFine line graduations are printed on .020 matte surface green transparent vinylThe 8 and 10 inch protractors have 1/2 degree graduationsThe...
Types of Protractors
Protractors are used to measure, draw, and transfer angles in drafting, geometry, design, engineering, and general layout work. Many drafting protractors are transparent so users can see lines, drawings, and measurements beneath the tool while working.
This category includes standard 180-degree protractors, 360-degree circular protractors, protractor rulers, swing arm protractors, quick angle measuring tools, and math instrument sets for school, studio, drafting, and technical drawing applications.
- Semicircular Protractors: Traditional 180-degree protractors for measuring and drawing angles in drafting, geometry, and classroom work
- Circular Protractors: 360-degree protractors for full-angle measurement, circular layouts, and technical drawing applications
- Protractor Rulers: Combination tools that include a ruler and protractor in one piece for quick layouts and angle measurement
- Swing Arm Protractors: Feature an adjustable arm to help measure, mark, and transfer angles more easily
- Transparent Protractors: Clear plastic, acrylic, or vinyl tools that allow users to see the drawing surface beneath the protractor
- Math & Geometry Sets: Include protractors with rulers, triangles, and other basic measuring tools for students and classroom use
Protractors for Drafting, Geometry & Layout Work
Drafting protractors are useful for creating accurate angles, checking measurements, setting up geometric drawings, and laying out technical work on paper. They are commonly used with drafting triangles, T-squares, scales, rulers, and straightedges.
Clear and transparent protractors are especially helpful for paper-based drawing because the user can align the tool with existing lines, center marks, and layout details without covering the work area.
Choosing the Right Protractor
When choosing a protractor, consider the size, shape, material, measurement range, and intended use. A 180-degree semicircular protractor is a practical choice for basic angle measurement, while a 360-degree circular protractor is useful when full rotation measurement is needed.
Protractor rulers are convenient when both angle measurement and straight-line measuring are needed in one tool. Swing arm and quick angle protractors are helpful for measuring or transferring angles during drafting, layout, and design work.
Classroom, Drafting & Technical Drawing Uses
Protractors are used in drafting courses, math classes, engineering programs, art rooms, design studios, and general technical drawing environments. They support angle measurement, geometric construction, preliminary layouts, diagrams, and scaled drawing work.
For students and classroom use, simple transparent protractors and math sets are often practical. For drafting and layout work, larger protractors, circular protractors, and combination protractor rulers may provide better visibility and more measuring options.
Complete Your Drafting Workspace
Pair protractors with drafting triangles, T-squares, rulers, scales, drafting pencils, and drawing boards for accurate angle measurement, geometry, and technical drawing work.
Shop Drafting Triangles | Shop T-Squares | Shop Drafting Scales | Shop Rulers & Straightedges | Shop Drafting Pencils & Leads
