| Hole | Angle | X Coordinate | Y Coordinate |
|---|
| Hole | Angle | X Coordinate | Y Coordinate |
|---|
Enter the number of equally spaced holes and either the bolt-circle radius or diameter.
The calculator divides 360° by the hole count and calculates each position using:
X = R × cos(θ)
Y = R × sin(θ)
Change the starting angle when Hole 1 needs to begin somewhere other than the positive X axis.
Good paid features for a public version of this site:
✓ DXF export
✓ G-code output
✓ Multiple bolt circles
✓ Custom center offset
✓ Saved jobs
✓ Hole diameter / drill callouts
✓ No ads
Payment processing is not connected in this demo. Stripe can be added after the site is hosted.