Unlock precision in your projects with our versatile Thread Calculator. Easily determine essential screw thread dimensions including Major Diameter, Minor Diameter, Pitch Diameter (Effective Diameter), Pitch, and approximate Tap Drill Size for both metric and imperial units. Ideal for engineers, machinists, and hobbyists.
Formula:
For standard 60° V-threads (e.g., ISO Metric, Unified), given Major Diameter (D) and Pitch (P):
- Fundamental Triangle Height (H) = 0.866025 × P
- Pitch Diameter (D2 or E) = D - 0.649519 × P
- Minor Diameter (D1) = D - 1.082532 × P
- Approximate Tap Drill Size = D - P (for internal threads)