⚙️ Bolt Circle Calculator
Find bolt circle angle and hole spacing (PCD).
How it works:
Enter pitch circle diameter (PCD) and number of holes. Angle between holes = 360° ÷ number of holes.
Results
Tips
• PCD = diameter of the circle through bolt centers. • Angle between adjacent holes = 360° ÷ n. • Bolt spacing (arc length) = π × PCD ÷ n.