GDTP (Y14.5) - Geometric Dimensioning and Tolerancing Professional Certification

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Demonstrate the critical skills and knowledge needed for dimensional engineering. Stand out in your field and design with confidence.
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Apply today to become GDTP Senior Level
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Start your Geometric Dimensioning and Tolerances Professional (GDTP) journey today.

Ready to take your engineering career to the next level? As a skilled user of GD&T you can ensure your design functional and quality requirements will be met by clearly communicating maximum allowable tolerances to manufacturers. Demonstrate your mastery of GD&T by achieving a GDTP certification. Gain a competitive edge by joining an elite group of engineering professionals who excel at dimensional engineering.

Two engineers with hard hats and safety goggles examining papers papers

Drive Your Career Forward.

Enhance your career potential with a GDTP certification. A GDTP certification lets the world know that you have the skills to reduce costly rework, and meet scheduling commitments while improving product quality through proper application of GD&T.

To become certified, you must know how to select the appropriate geometric characteristic symbols, calculate tolerances, select meaningful datum features, use material condition modifiers, and apply form controls, orientation controls, and location controls. As a certified master of these concepts, others will know that you are able to ensure proper fit and function of parts and assemblies, reduce errors and rework, and enhance product quality.

Professional Certificate Success Stories 

Leading global manufacturers rely on ASME’s GDTP certification.  
There are over 1300 of ASME Certified GDTP Professionals worldwide.  

Invest in Your Company

Avoid costly mistakes and reduce manufacturing re-work and inspection through proper GD&T application and interpretation. Reduce production delays, safety issues and improve customer satisfaction. 
Accelerate the product lifecycle by reinforcing uniform engineering drawing and documentation interpretation in your company, from design to manufacturing to inspection.  Avoid confusion and missteps throughout your extended supply chain. 
ASME GDTP certification sets the industry standard for dimensional engineering and is respected by employers, customers, and peers. A GDTP certified team can increase revenue, win new contracts, and fulfill government contract requirements. Showcasing your GD&T program earns customer trust for precise and efficient product delivery.
Precisely convey design intent and improve the quality and consistency of your products with the help of internationally recognized and accepted standards. Improve drawing translation and communication of product designs among your staff, suppliers, and customers. 

How do I get certified?

The payment for the examination must be submitted prior to submitting an application. Payment by credit card may be submitted on or via phone. Please visit the FAQ section for payment options.
Within 24 hours of making your GDTP application purchase, you will receive a confirmation by email. This email will contain instructions for accessing ASME-PC Connect, ASME’s certification management system, to submit your application.
Once your application has been accepted, you will receive an email with instructions on how to schedule your exam. Exams are conducted at a conveniently-located Prometric Testing Center. You have 180 days to schedule your exam from the time your application is approved. 
Even if you have used GD&T in the past, you will need to review the specific details in ASME Y14.5 - 1994 or ASME - Y14.5 2009 depending on which exam you register for.  Previously GDTP certified professionals have used study guides, training courses and mentoring to prepare for the exam.  Check out the FAQ for additional ASME resources.
ASME will notify you of your test results. If your test was successful, you will be notified via email and have the ability to download a digital copy of the certificate and you will be entered to certificate holder's listing on ASME-PC Connect. If your test was not successful, you will be provided with instructions for a retest. 
An applicant who passes the GDTP exam will be issued a certificate. Certificates will identify the Y14.5 Standard revision the certification is based on, and the level of certification. The certificates will have an expiration date of three years from the date of issuance. Visit the FAQ section for information on re-certification. 

Which Certification is right for me?

Are you responsible for creating or understanding engineering drawings in your role? Whether you're a Quality Inspector, Manufacturing Engineer, CAD Designer, or any other technical professional, GDTP certification can help you master the precise language of geometric dimensioning and tolerancing, to improve your company’s bottom line and reduce manufacturing-related headaches. ASME offers two levels of GDTP certification, tailored to the widely used Y14.5-2009 or Y14.5M-1994 standards. 

Technician Level

Demonstrate competencies in reading & interpreting engineering drawings.

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Senior Level

Measures your ability to select & apply geometric controls to drawings.

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Technologist Levels (ASME Y14.5M-1994 or ASME Y14.5-2009)

The Technologist level examination emphasizes the applicant’s knowledge of GD&T principles, concepts, and practices in accordance with. ASME Y14.5M-1994 or ASME Y14.5-2009. Certification indicates that the individual has demonstrated competencies in the understanding of the symbols, modifiers, and relationships of Geometric Dimensioning and Tolerancing (GD&T) as applied to engineering drawings and related documentation.

In order to be certified as a Technologist GDTP, applicants must successfully pass the Technologist GDTP Examination. There is no experience requirement. 

Who should get certified: 
Design (CAD Designers and Engineers, Design Engineers, Product Engineers, Draftsperson, Engineering Managers) Tooling (CNC Operators and Machinist, Tooling Engineers, Manufacturing Engineers) Production (Manufacturing and Production Managers, Engineers, Technicians) Quality & Inspection (CMM Operator and Metrology Specialist, Quality Managers, Engineers, Technicians, and Inspectors, Supplier Quality Engineers)

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Take the first step, purchase your application today.


Certification Name


Technologist Level


GDTP – 1994 Technologist level


GDTP – 2009 Technologist level


Senior Level


GDTP – 1994 Senior level 


GDTP – 2009 Senior level 


Please note that by purchasing the exam package, you are purchasing the right to take the exam. Your eligibility to take the exam will be evaluated, and if you do not qualify, the package price will be refunded to you.

Senior Levels (ASME Y14.5M-1994 or ASME Y14.5-2009)

The Senior level examination emphasizes knowledge, selection, and application of the dimensioning and tolerancing principles, concepts, and practices contained in ASME Y14.5M-1994 or ASME Y14.5-2009, including appendices.  Certification indicates that the individual has demonstrated competencies in the understanding of geometric tolerancing and related principles, tolerance calculation, datum feature selection, application of modifiers in feature controls and composite tolerances. Requirements are as follows:

  • Applicants must have five years (60 months) of documented experience in the field of GD&T in the recognized use of the system in both application and understanding 
  • Successfully pass the Senior GDTP Examination. 
  • Note: It is not required to be a certified GDTP Technologist to qualify for Senior Level certification. ASME membership is not an exam requirement. 

Who should get certified:
Product Design Engineers, Manufacturing Engineers, Tooling Engineers, Draftspersons.  If you work in product design, manufacturing, or tooling engineering, or as a draftsperson in industries that design and manufacture complex products or systems, operate global supply chains, face strict regulatory requirements, involve multiple sites or locations, work with distributed teams, or manage projects that require precision in their design and manufacturing processes, GD&T is critical to achieving first-time right success. 

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