Count formula
The calculator subtracts both edge insets, rounds the required number of intervals up so the maximum spacing is never exceeded, then adds one end mark.
ceil((width - 2 × inset) / max spacing) + 1Curtain hardware planner
Curtain Ring Spacing Calculator
Find how many curtain rings or hooks each panel needs, then mark every position evenly from the left edge.
Panel measurements
Measure one curtain panel
Measure the finished panel flat. The inset is the distance from each fabric edge to the first and last ring or hook.
Hardware plan
12rings or hooks per panel
- Total hardware
- 24
- Exact spacing
- 4.73 in
- Span between end marks
- 52 in
Exact layout
Mark positions from the left edge
Measure each position from the same edge instead of adding the spacing repeatedly; this prevents small errors from accumulating.
The preview shows relative positions. Use the numbered measurements above for installation.
How the curtain ring count is calculated
Practical marking sequence
- Mark the first and last positions using the chosen edge inset.
- Use the calculated spacing to mark every position from the same starting edge.
- Check the hardware count and hang one panel before marking the remaining panels.
Spacing guidance and hardware instructions
Four to six inches is a common starting range for clip rings, but curtain weight, pleats and hardware systems vary. Keep the spacing editable and follow the curtain or track manufacturer when its instructions differ.
Curtain ring spacing FAQ
How many curtain rings do I need per panel?
Enter the finished panel width, maximum spacing and edge inset. The calculator rounds the interval count up, so the final spacing will not exceed your limit.
How far apart should curtain rings be?
Four to six inches is a common starting range for clip rings. Heavier fabric, pleated headings and proprietary tracks may require different spacing.
Why is the adjusted spacing smaller than my maximum?
The maximum is a limit, not a fixed gap. The calculator divides the usable span into equal intervals that fit within that limit.
Should I measure each mark from the previous mark?
No. Measure every mark from the same panel edge to avoid accumulating rounding and tape-measure errors.