Pitch Diameter Calculator
Calculate pitch diameter for external and internal threads based on thread dimensions and class fit.
Thread Type
Type of thread to calculate
Thread standard
Thread Dimensions
Nominal thread diameter
Number of threads per inch
Thread pitch in millimeters
Fit tolerance class
Pitch Diameter
0.0000
in
Minor Diameter
0.0000
in
Height of Thread
0.0000
in
Thread Type
External
Thread Standard
Unified
Thread Class
2A / 2B
Pitch (in)
0.0000 in
Major Diameter
0.0000
in
TPI
0
threads per inch
Class Fit
2A
selected
For Unified threads: Pitch Diameter = Major Diameter - 0.649519 × (1/TPI)
E = D - 0.649519 × P (external)
P = 1/TPI (inches)