Metric Screw Pitch Diameter Calculator

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Calculates the pitch diameter of a metric screw thread, given its nominal diameter and pitch.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Nominal Diameter (mm) and Pitch (mm) in the units shown.

Step 2

Read Pitch Diameter (mm) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Nominal Diameter (mm): 10 mm; Pitch (mm): 1.5 mm

Pitch Diameter (mm): 8.559265 mm

Nominal Diameter (mm): 8 mm; Pitch (mm): 1.25 mm

Pitch Diameter (mm): 6.7993875 mm

Nominal Diameter (mm): 6 mm; Pitch (mm): 1 mm

Pitch Diameter (mm): 5.03951 mm

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