Calculators & Converters

Metric Thread Profile Calculator

Determine precise metric thread dimensions by inputting thread size, pitch, and tolerances. The metric thread profile calculator helps you ensure that components fit correctly, comply with standards, and meet design and manufacturing requirements.

Calculate Your Metric Thread Profile

The calculations are based on the following standards:

  1. ISO 965-1:1998 – Provides the general dimensions and tolerances for metric threads, including thread profiles and pitch.
  2. ISO 68-1:1998 – Specifies the general specifications for thread forms, including the design of metric threads.
  3. ASME B1.13M-2005 – Offers standards for the dimensions and tolerances of metric threads, ensuring compatibility with U.S. standards and practices.

Metric ISO thread basic concept and dimension

Model Used

  1. D = basic major diameter of internal thread
  2. D2= basic pitch diameter of internal thread
  3. D3= basic minor diameter of internal thread
  4. d = basic major diameter of external thread
  5. d2= basic pitch diameter of external thread
  6. d3= minor diameter of external thread
  7. P = pitch

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