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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  • 6" Engineer Select-A-Scale 6" Engineer Select-A-Scale

    6" Engineer Select-A-Scale

    Alumicolor
    $11.85
    Alumicolor Engineer Select-a-Scale are an ultra convenient and functional drafting tool that allows engineers to select multiple scales all in one product. The unique design incorporates a...
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    $11.85
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  • 6" Flat Pocket Engineering Scale 6" Flat Pocket Engineering Scale

    6" Flat Pocket Engineering Scale

    Alvin Drafting
    $6.70

    (2)

    The Alvin Drafting 6" Plastic Engineer Scale is a professional-grade ruler ideal for students and professionals in engineering and architecture, featuring six different scales for accurate...
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  • 6" Four-Bevel Aluminum Architectural Scale 6" Four-Bevel Aluminum Architectural Scale

    6" Four-Bevel Aluminum Architectural Scale

    Alumicolor
    $7.20

    (2)

    Alumicolor Architect6" Four Bevel Scales are precision measuring and drawing devices. Alumicolor's photo anodizing process make the calibrations a part of the aluminum providing a smooth, tick-free...
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  • 6" Four-Bevel Architect Joist/Truss Scale 6" Four-Bevel Architect Joist/Truss Scale

    6" Four-Bevel Architect Joist/Truss Scale

    Alumicolor
    $7.20
    Alumicolor Joist/Truss Scales are accurate, quality 4 bevel scales, which will be a BIG hit with architects, builders, roofers, framers and lumber yards. The (3/16", 3/32") scales are used frequently...
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    $7.20
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  • 6" Pocket Aluminum Combination Scale 6" Pocket Aluminum Combination Scale

    6" Pocket Aluminum Combination Scale

    Alumicolor
    $5.45

    (1)

    Alumicolor 6" Pocket Scales are a smaller version of the 12" professional solid scale. The pen-size, lightweight design provides professionals and students with a scale that can be taken anywhere...
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    $5.45
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  • 6" Pocket Aluminum Engineers Scale 6" Pocket Aluminum Engineers Scale

    6" Pocket Aluminum Engineers Scale

    Alumicolor
    $5.45

    (2)

    Alumicolor 6" Pocket Scales are a smaller version of the 12" professional solid scale. The pen-size, lightweight design provides professionals and students with a scale that can be taken anywhere...
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    $5.45
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  • Architect Drawing Tool Set Architect Drawing Tool Set

    Architect Drawing Tool Set

    Alumicolor
    $30.40

    (1)

    Alumicolor’s® Architect Drafting Sets offer a convenient, cost-effective package that combines essential drafting tools. Each product is made from solid aluminum, with calibrations that are photo...
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    $30.40
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  • Engineer Drawing Tool Set Engineer Drawing Tool Set

    Engineer Drawing Tool Set

    Alumicolor
    $30.40
    Alumicolor's Engineers Drawing Sets combine key products in one easy-to-purchase, cost-effective package. All products are made from solid aluminum and calibrations are photo anodized. The anodizing...
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    $30.40
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  • Scale Template

    Scale Template

    Pickett
    $8.85
    Pickett templates have been designed to conform to the exacting demands of the professional architect, draftsperson and engineer.Features: Handy pocket rule with six printed scales in 1/10",...
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    $8.85
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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