Shop drafting triangles for technical drawing, engineering layouts, architectural drafting, geometry, and precision line work. Drafting triangles are essential tools for creating accurate verticals, angles, parallel lines, and layout alignments in manual drafting and technical drawing applications.
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Smoke Triangles - Inking Edge
Alvin Drafting$2.30 - $7.70The Alvin inking edge triangles are made of molded 0.10" thick polystyrene and feature a transparent non-glare smoke tint for easy visibility.Features: 30º/60º and 45º/90º trianglesAvailable in multiple sizes ranging from 4" to 14"Inking-Edge... -
Drafting Triangle Set
Westcott$6.45Westcott Drafting Triangle Set delivers precision and quality for technical drawing, architectural drafting, and geometric design work. This professional-grade triangle set combines durability with innovative design features, making it an essential tool... -
Academic Transparent Triangles
Alvin Drafting$2.00 - $5.40These Academic Drafting Triangles have a double-taper cutout center for easy lifting, enhancing efficiency. Made from durable, extra-heavy acrylic, they resist discoloration and warping. Ideal for students, hobbyists, and professionals, these tools... -
10" Fluorescent Triangles - Inking Edge
Alvin & Co.$2.80 - $3.80BulletsFeatures: 30º/60º and 45º/90º trianglesAvailable in multiple sizes ranging from 4" to 14"Inking-Edge Triangles0.10" thickFluorescent orange color reflects light along the drawing edgeEdges are double beveled with handy finger-lifts for quick... -
2-Piece Aluminum Triangle Set
Alumicolor$12.00 - $14.70Alumicolor Calibrated Triangles are made of tempered aluminum. Photo anodized calibrations are a part of the finish and resist cleaning or rubbing off. Ultra smooth finish won't mark your work surface. Available in 45/90 or 30/60-angles with calibrations... -
3" Triangle Stainless Steel Ruler
Alvin Drafting$6.10Made of durable stainless steel with etched inch graduations, this drafting triangle ruler is ideal for hobby and craft projects, drawing, drafting, and more. Its high strength and hardness make it perfect for woodworking, ensuring long-lasting use. The... -
8" 45/90 Acrylic Cutting-Edge Triangle
Art Alternatives$13.30These clear acrylic triangles features grid markings including centering lines to facilitate scaled drawings, geometric compositions, and detailed linework. These are multi-use tools, handy for measuring, drawing and cutting. Two edges are beveled for... -
Aluminum Calibrated Triangles
Alumicolor$5.95 - $13.45BulletsFeatures: Available in 45/90 or 30/60-anglesSizes 6" to 12" with calibrations in inches and centimetersNow featuring calibrations on the holesTempered aluminumDescriptionAlumicolor® Calibrated Aluminum Triangles are made of tempered aluminum... -
Aluminum Triangles
Fairgate$22.40 - $45.60Lightweight, durable aluminum with matte-satin finish that resists stains and tarnishing. Features 1/16" graduations on the 90 angle. May also be used as a template for circles from 1/16" to 1 3/8".Made in the USA -
Clear Acrylic Professional Triangles - Straight Edge
Pacific Arc$2.90 - $45.95The Pacific Arc Clear Professional triangles will not discolor or warp with age and handling. Features: 30º/60º and 45º/90º professional clear trianglesAcrylic that will not feather with ageAvailable in multiple sizes ranging from 4" to... -
Clear Acrylic Triangles - Straight Edge
Alvin Drafting$5.70 - $58.80The Alvin Clear Professional triangles will not discolor or warp with age and handling. Features: 30º/60º and 45º/90º professional clear trianglesAvailable in multiple sizes ranging from 4" to 24"Straight-Edge Triangles1/8" thickWill not discolor... -
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 -
Computing Adjustable Triangle - Inking Edge
Alvin Drafting$20.40 - $33.75The Alvin Drafting Computing Adjustable Triangles are ideal for calculating length and distance in classrooms and professional applications, this tool features an optically clear acrylic body for easier and more accurate measuring. The thumbscrew lock... -
Fluorescent Triangles - Straight Edge
Alvin Drafting$6.10 - $25.80The Alvin Professional Fluorescent triangle is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangles edge.Features: 30º/60º and 45º/90º professional fluorescent trianglesAvailable in... -
Fluorescent Triangles - Straight-Edge
Pacific Arc$3.40 - $52.25The Pacific Arc Professional Fluorescent triangle is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangles edge.Features: 30º/60º and 45º/90º professional fluorescent... -
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... -
Professional Adjustable Triangle - Inking Edge
Pacific Arc$18.60 - $27.30Professional-quality adjustable triangle with inking edges.Features: 8", 10" or 12" adjustable triangleInking edge is compatible with any writing utensilMarked with rise in tangent, seconds, and degreesClear Acrylic -
Professional Adjustable Triangles - Straight Edge
Staedtler$26.35 - $43.75Clear acrylic with smooth edges. Protractor section is graduated in 1/2 degree increments from 0 to 90 degrees. Available in even sizes from 8" to 12". Features: .118" thick clear acrylic prevents warping and provides maximum stiffnessMagnifier... -
Scholastic Fluorescent Triangles - Inking Edge
Pacific Arc$2.00 - $8.95The Fluorescent Scholastic Triangle is a durable and versatile tool designed for both students and professionals. Made from 0.08” thick polystyrene, this drafting triangle features a precision inking edge that ensures clean, smudge-free lines, making it... -
Scholastic Triangle Set
Pacific Arc$2.60 - $4.80One of the best value triangles on the market! Designed specifically for students, crafters, and professionals on a budget.Available in: 8", 10", 12"Features: Set of two triangles. 1 each 30/60 & 45/90 degree trianglesIncludes reusable caseInch/Metric...
Types of Drafting Triangles
Drafting triangles are precision measuring and layout tools used to create accurate angles, straight lines, perpendiculars, and parallel lines for technical drawing and design work. These tools remain widely used in architecture, engineering, drafting education, fabrication layouts, geometry instruction, and manual drafting workflows where repeatable accuracy is critical.
- 45° Drafting Triangles: Create verticals, horizontals, and 45-degree angles commonly used in engineering and technical drawing layouts
- 30°/60° Drafting Triangles: Draw 30-degree, 60-degree, and vertical angle layouts used in architectural and isometric drafting applications
- Adjustable Drafting Triangles: Support variable-angle layouts and precision drafting applications requiring custom angle settings
- Professional Drafting Triangles: Feature durable acrylic construction, beveled edges, inking edges, and precision graduations for professional drafting work
- Metric Drafting Triangles: Include metric graduations for engineering, technical drawing, and international drafting standards
- Transparent Drafting Triangles: Improve visibility and drawing alignment during layout, tracing, and technical drawing work
- Combination Triangle Sets: Pair 45-degree and 30°/60° triangles for complete drafting and geometry coverage
- Classroom & Student Triangles: Support STEM education, geometry instruction, drafting courses, and technical drawing fundamentals
Why Drafting Triangles Still Matter
Even in modern CAD environments, drafting triangles remain valuable for classroom instruction, concept sketching, fabrication layouts, field work, geometry education, overlays, and manual drafting applications. Many architects, engineers, designers, and students still use drafting triangles to develop accurate layout techniques and foundational drafting skills.
High-quality drafting triangles are engineered for precise alignment, smooth edge movement, accurate angle layouts, and long-term durability in technical drawing environments. Professional drafting triangles help reduce layout errors while improving line accuracy and drawing consistency.
Choosing the Right Drafting Triangle
When selecting a drafting triangle, consider the angle configuration, size, edge style, and type of drawing work being performed. Standard 45-degree and 30°/60° triangles cover most drafting applications, while adjustable triangles provide additional flexibility for custom layouts and advanced technical drawing work.
Complete Your Drafting Workspace
Pair drafting triangles with related drafting instruments and drawing tools to create accurate layouts, technical drawings, and engineering plans.
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