Drafting Scales

Shop drafting scales for architecture, engineering, mechanical drafting, technical drawing, design layouts, and professional measurement applications. Drafting scales, triangular rulers, and triangular scale rulers are precision measuring tools used to create and read scaled drawings, construction plans, engineering layouts, and technical illustrations.

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  • 12" High-Impact Plastic Architect Scale

    12" High-Impact Plastic Architect Scale

    Pacific Arc
    $6.50
    The slender core Premium Plastic Triangular Architect Scale is a step up from the Scholastic architects scale.  This professional quality scale is made from high-impact plastic with yellow, non-reflecting dull-matte faces and tapered edges...
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    $6.50
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  • 12" High-Impact Plastic Engineer Scale

    12" High-Impact Plastic Engineer Scale

    Pacific Arc
    $6.50
    The slender core Premium Plastic Triangular Engineer Scale is a step up from the Scholastic architects scale.  This professional quality scale is made from high-impact plastic with white, non-reflecting dull-matte faces and tapered edges...
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  • 12" Hollow Aluminum (Left to Right) Architect Scale 12" Hollow Aluminum (Left to Right) Architect Scale

    12" Hollow Aluminum (Left to Right) Architect Scale

    Alumicolor
    $9.15
    Alumicolor triangular Drafting Scales are made of extruded aluminum. Alumicolor's photo anodizing process makes the calibrations a part of the aluminum, providing a smooth, tick-free finish and markings which are resistant to cleaners and solvents...
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  • 12" Hollow Aluminum Architects Scale 12" Hollow Aluminum Architects Scale

    12" Hollow Aluminum Architects Scale

    Alvin Drafting
    $10.60
    This hollow architectural aluminum scale from Alvin is a durable, high-quality scale made of extruded aluminum. Photo anodized calibrations are a part of the aluminum, providing a smooth, tick-free finish. Hollow Scales are lightweight for easy...
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  • 12" Hollow Aluminum Combination Scale 12" Hollow Aluminum Combination Scale

    12" Hollow Aluminum Combination Scale

    Alumicolor
    $9.15
    Alumicolor triangular Drafting Scales are made of extruded aluminum. Alumicolor's photo anodizing process makes the calibrations a part of the aluminum, providing a smooth, tick-free finish and markings which are resistant to cleaners and solvents...
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  • 12" Hollow Aluminum Engineer Scale 12" Hollow Aluminum Engineer Scale

    12" Hollow Aluminum Engineer Scale

    Alumicolor
    $9.15
    Alumicolor triangular Engineer Drafting Scales are made of extruded aluminum. Alumicolor's photo anodizing process makes the calibrations a part of the aluminum, providing a smooth, tick-free finish and markings which are resistant to cleaners and...
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    $9.15
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  • 12" Professional Architect Scale

    12" Professional Architect Scale

    Alvin Drafting
    $11.70
    Get accurate, easy-to-read measurements with this professional-grade multipurpose scale, designed for architects, engineers, and mechanical drafting. Whether you're a student learning the fundamentals or a seasoned professional refining detailed plans,...
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  • 12" Professional Engineer Scale

    12" Professional Engineer Scale

    Alvin Drafting
    $11.70
    Built specifically for engineers and mechanical drafting professionals, this triangular scale delivers crisp readability, reliable accuracy, and long-lasting performance. With machine-engraved graduations and a thoughtfully designed matte finish,...
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  • 12" Scholastic Architect Scale 12" Scholastic Architect Scale

    12" Scholastic Architect Scale

    Pacific Arc
    $4.95

    (1)

    Economy Scholastic Triangular Architect Scales offer a budget-friendly option for students and those with limited resources. These white scales are ideal for situations where budgets are tight, providing essential functionality without compromising...
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  • 12" Scholastic Color-Coded Architect Scale 12" Scholastic Color-Coded Architect Scale

    12" Scholastic Color-Coded Architect Scale

    Pacific Arc
    $5.90
    The Scholastic Architects Triangular Scale features color-coded markings for simplified usage.Architect Graduations 3/32", 1/8", 3/16", 1/4", 3/8", 1/2", 3/4", 1", 1-1/2", 3", 16" Features: 12" Architect ScaleHigh quality - Hard PlasticColor-Coded...
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  • 12" Scholastic Color-Coded Engineer Scale 12" Scholastic Color-Coded Engineer Scale

    12" Scholastic Color-Coded Engineer Scale

    Pacific Arc
    $5.90

    (1)

    Scholastic Engineers Triangular Scale - Color Coded Scholastic triangular scale are color coded for easy use.Engineer GraduationsFully divided: 10, 20, 30, 40, 50, & 60 parts to the inchFeatures: 12" Engineer ScaleHigh quality - Hard PlasticColor-Coded...
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  • 12" Scholastic Combination Scale 12" Scholastic Combination Scale

    12" Scholastic Combination Scale

    Alvin Drafting
    $6.10
    Our top-selling 12" triangular scales are perfect for school and vocational use, combining affordability with high quality. Made from durable high-impact plastic with a smooth satin finish and tapered edges, they provide comfort and longevity. The clear,...
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  • 12" Scholastic Combination Scale-1764130199 12" Scholastic Combination Scale-1764130199

    12" Scholastic Combination Scale-1764130199

    Alvin Drafting
    $6.10
    Our top-selling 12" triangular scales are perfect for school and vocational use, combining affordability with high quality. Made from durable high-impact plastic with a smooth satin finish and tapered edges, they provide comfort and longevity. The clear,...
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    $6.10
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  • 12" Scholastic Combination Scale-1764372305 12" Scholastic Combination Scale-1764372305

    12" Scholastic Combination Scale-1764372305

    Pacific Arc
    $5.00
    The Economy Scholastic Inch/Metric Scales provide budget-friendly options for students and those on tight budgets. Despite their affordable price, these white scales maintain durability and quality with their sturdy plastic construction. Designed for...
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  • 12" Scholastic Engineer Scale 12" Scholastic Engineer Scale

    12" Scholastic Engineer Scale

    Pacific Arc
    $4.95

    (1)

    The Economy Scholastic Triangular Engineer Scales present a cost-effective solution tailored for students and individuals with constrained budgets. These white scales are optimal for scenarios requiring frugality, offering indispensable functionality...
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  • 12" Scholastic Engineering Scale 12" Scholastic Engineering Scale

    12" Scholastic Engineering Scale

    Alvin Drafting
    $6.10

    (3)

    Our most popular series of 12" triangular scales is highly recommended for scholastic and vocational use due to its budget-friendly pricing and exceptional quality. Crafted from high-impact plastic with a satin finish and tapered edges, these scales...
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  • 12" Scholastic Mechanical Drafting Scale 12" Scholastic Mechanical Drafting Scale

    12" Scholastic Mechanical Drafting Scale

    Alvin Drafting
    $5.50
    Our 12" mechanical drafting triangular scales are ideal for school and vocational use, blending affordability with durability. Crafted from high-impact plastic with tapered edges and sharp, easy-to-read graduations, they ensure comfort and precision...
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  • 12" Scholastic Mechanical Engineer Scale 12" Scholastic Mechanical Engineer Scale

    12" Scholastic Mechanical Engineer Scale

    Pacific Arc
    $4.95
    Economy triangular scales are white and ideal when budgets are at a minimum.   High quality plastic promises strength and demonstrates long-lasting calibers.Mechanical Engineer GraduationsOpen divided: 1/8, 1/4, 1/2, and 1 inch to the foot;...
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  • 12" Two-Bevel Mechanical Engineer Scale 12" Two-Bevel Mechanical Engineer Scale

    12" Two-Bevel Mechanical Engineer Scale

    Pacific Arc
    $9.30

    (1)

    Classic 12" plastic two bevel plastic scale. Finely etched graduations for years of use. Scales: 1/16 and 1/32 size, Fully DividedMechanical Engineer Graduations Combo Fully Divided: 1/16 (192 ft) & 1/32 (384 ft) Features: Etched graduations...
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  • 15cm Aluminum Metric Architect Pocket Scale 15cm Aluminum Metric Architect Pocket Scale

    15cm Aluminum Metric Architect Pocket Scale

    Alumicolor
    $5.45
    The Alumicolor Metric Architect pocket scale, compact and lightweight like a pen, offers portability and convenience for both students and professionals alike. Crafted from high-quality extruded aluminum, it ensures durability and precision in...
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Types of Drafting Scales

Drafting scales are specialized measuring tools designed for reading, creating, and transferring scaled measurements in technical drawings and design layouts. This category includes architect scales, engineering scales, combination scales, mechanical drafting scales, metric scales, triangular rulers, ruler triangular designs, and triangular scale rulers used by architects, engineers, designers, students, and drafting professionals.

  • Architect Scales: Support architectural floor plans, elevations, blueprints, and building design layouts using fractional scale systems
  • Engineering Scales: Use decimal graduations for civil engineering, surveying, infrastructure layouts, and technical drawing applications
  • Combination Scales: Combine multiple drafting scale systems into a single measuring tool for flexible drafting workflows
  • Mechanical Drafting Scales: Provide specialty graduations and precision measurement systems used in mechanical and technical drawing applications
  • Metric Scales: Support metric drafting, engineering layouts, international standards, and STEM education applications
  • Triangular Rulers: Offer multiple scale graduations on a compact three-sided ruler design for efficient drafting and measurement work
  • Triangular Scale Rulers: Help users quickly switch between multiple drafting scales while maintaining accurate layout measurements

Understanding Drafting Scales

Drafting scales are essential tools used to convert real-world dimensions into scaled technical drawings and layouts. Architects, engineers, designers, and drafters use scale rulers to accurately read and create drawings that represent buildings, infrastructure, machinery, products, and technical systems at reduced or enlarged sizes.

Triangular rulers remain one of the most popular drafting scale formats because they allow multiple scale graduations to be combined into a compact and efficient measuring tool. A triangular scale ruler helps streamline drafting workflows by allowing users to switch quickly between different scale systems without changing tools.

Drafting Scales in Architecture & Engineering

Different drafting disciplines rely on different scale systems. Architect scales commonly use fractional measurements found in building plans and construction drawings, while engineering scales use decimal graduations often preferred for civil engineering and technical layouts.

Mechanical drafting scales and metric scales support additional technical applications requiring specialized graduations and international measurement standards. Using the proper drafting scale improves layout accuracy, readability, and consistency throughout technical drawing workflows.

Choosing the Right Triangular Scale Ruler

When selecting drafting scales, consider the drafting discipline, graduation system, material, edge style, and intended application. Triangular rulers are popular because they provide multiple scale systems in a single compact tool, while flat drafting scales may offer larger graduations and easier readability for specific workflows.

Professional drafting scales are designed with accurate graduations, durable materials, and clear markings that remain readable during repeated technical use. Choosing the correct scale ruler helps improve measurement accuracy and workflow efficiency in drafting, architecture, engineering, and design environments.

Complete Your Drafting Workspace

Pair drafting scales with drafting pencils, technical pens, triangles, templates, and drafting paper for accurate technical drawings and professional layout applications.

Shop Drafting Pencils & Leads | Shop Technical Pens | Shop Drafting Triangles | Shop Drafting Templates | Shop Drafting Paper