Thread pitch is the axial spacing between adjacent thread crests.
Thread Pitch Calculator
Form
Results
Threads per inch (TPI)
0
Thread pitch (P)
0
Table of Contents
1
What is Thread Pitch?
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How to Use This Calculator
- Enter or select Thread length (L), Total number of threads (n).
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Pitch = measured axial length/number of pitches
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Variables Explained
| Input | What it means |
|---|---|
| Thread length (L) | The measured end-to-end distance of the section being calculated. |
| Total number of threads (n) | The number to test or transform; use the integer or real-number domain stated in the formula. |
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Worked Example
Ten full pitch intervals across 15 mm give a pitch of 1.5 mm.
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Why Use This Calculator?
Use the result to put measurements on a common basis before comparing them or estimating quantities. The original measurement precision still limits the precision of the answer.
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Common Mistakes
- Count intervals rather than just visible crests; 11 crests span 10 intervals.
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Frequently Asked Questions
When should I round a measurement?
Carry the measured values and conversion factors through the calculation first. Round the final result to a precision justified by the original measurements.
Why can a supplier’s quantity differ?
Measurement conventions, nominal sizes, density assumptions and purchase rounding can change a practical quantity. Compare the units and assumptions before comparing the numbers.
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Sources & References
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