Calculators
Net income for remote workers
Full-year 2026 estimate for a local employee with constant pay; excludes self-employment and cross-border tax treaties.
Use tool
Calculators · Free
Bolt circle coordinate planner
Generate numbered X/Y centers for evenly spaced holes, with a diagram and CSV.
01Enter your values
Runs in your browser02Bolt circle coordinate planner
Runs in your browser
How it works
Generate numbered X/Y centers for evenly spaced holes, with a diagram and CSV.
θᵢ = θ₀ ± i × 360°/n; Xᵢ = X₀ + D/2 × cos(θᵢ); Yᵢ = Y₀ + D/2 × sin(θᵢ)
Runs in your browser
Discovery source
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Generate numbered X/Y centers for evenly spaced holes, with a diagram and CSV.
For machinists laying out a complete circle: enter diameter, hole count and starting angle; optionally move the center. All lengths are mm. Zero degrees points along +X; +Y points up. Coordinates use sine and cosine. This is geometry, not G-code, tolerances or structural approval.
How to use it
- Enter your values
Pitch circle diameter · Hole count · Starting angle · Numbering direction · Center X · Center Y
- Calculate / generate
Generate numbered X/Y centers for evenly spaced holes, with a diagram and CSV.
- Result
90°
Calculation method
θᵢ = θ₀ ± i × 360°/n; Xᵢ = X₀ + D/2 × cos(θᵢ); Yᵢ = Y₀ + D/2 × sin(θᵢ)
Bolt circle coordinate planner
- Pitch circle diameter
- 100 mm
- Hole count
- 4
- Starting angle
- 0 °
- Numbering direction
- Counterclockwise
- Center X
- 0 mm
- Center Y
- 0 mm
Result
90°
Frequently asked questions
Can I run this CSV on a machine?
No. These are hole-center coordinates only. Check the drawing, datum, units, clearances and machining program independently.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.