Multi-Window Wall Curtain Planner
Enter each window width, each gap between windows, the wall run, the rod height to floor, the panel width you want to buy, the fullness ratio you choose, and your heading and length styles. The plan gives one continuous rod length, panel count, panel width, stated fullness, gap coverage from the gaps you enter, and length style together.
How the plan is worked out
Single-window calculators compared
On live desktop search on 28 Oct 2026, no page 1 result for the curtains terms checked gave a whole-run plan with rod length, panel count, panel width, stated fullness, and length style together. The calculators below give part of a plan, for one window at a time.
| Calculator | What you enter | What it gives | What it does not give |
|---|---|---|---|
| Pepper Home curtain size calculator | One window width and rod height | Panels for that one window. In a check on 27 Oct 2026, 72 inches wide and 90 inches high gave 2 panels, 75 inches each, 90 long | One continuous rod for several windows, gap coverage, or a whole-run plan |
| OmniCalculator curtain size calculator | One window or rod | A single-window size calculation | One continuous rod for several windows, gap coverage, or a whole-run plan |
| This planner | Three window widths, two gap widths, wall run, rod height to floor, panel width wanted, fullness ratio, heading, and length style | One continuous rod length, windows plus gaps, panel count, panel width, stated fullness, and length style together | A spacing allowance, a bracket allowance, or a finished panel length, because those numbers are still to verify |
Guides that feed this tool: how to measure curtains, curtain fullness explained, curtain length guide, curtain heading styles.
One continuous rod length = the wall run you enter. This test tool adds no extension, bracket, return, or spacing allowance, because those numbers are still to verify against manufacturer documents.
Windows plus gaps = the three window widths you enter plus the two gap widths you enter. The wall run must not be smaller than that sum.
Total panel width = one continuous rod length times the fullness ratio you enter.
Panel count = total panel width divided by the panel width you want to buy, rounded up to the next whole panel.
Panel width = total panel width divided by panel count, so the panels share the total evenly.
Stated fullness = the fullness ratio you enter. Length style = the length style you choose. Heading choice is recorded only. No finished panel length is calculated in this test build, because length drops are still to verify.
Limits and sources: This test tool covers several windows on one wall only from the numbers you enter. It does not state a spacing rule or a bracket position, because no manufacturer source is on file yet, beyond the single-window brand checks below, for spacing rules, bracket positions, heading effects, or length drops.
Brand checks: Umbra and IKEA
Use these as a check on a single window, not as a rule for this tool. The two brands differ, so neither one replaces the wall run you enter above. This planner still uses the wall run you enter as the rod length.
| Brand check | What the brand says | Source |
|---|---|---|
| Umbra rod width | Measure the window including the frame, then add 8 inches in total to the width. | Umbra curtain rod guide |
| Umbra rod height and weight | Mount about 4 inches above the window frame, or halfway between the frame and the ceiling. Umbra rods in this guide are for light to medium curtains, up to about 22 pounds. | Umbra curtain rod guide |
| IKEA VIDGA width, fabric curtains | Add at least 15 centimetres, about 6 inches, on each side of the window, so curtains can open fully without blocking the window. | IKEA measuring guide |
| IKEA VIDGA width, panel curtains | Add 60 centimetres on each side, because panels need more space to open fully. | IKEA measuring guide |
| IKEA VIDGA height and depth | Mount the rail 15 centimetres above the window frame. VIDGA wall fittings are sold in 6 centimetre and 12 centimetre depths, so the depth you get is the fitting you buy, not a universal return number. | IKEA VIDGA guide |
For several windows on one wall, neither check above gives a gap or spacing rule. Gaps in this planner are exactly what you enter, and this planner does not add a spacing, bracket, or extension allowance.
Worked examples
Three windows, 144 inch wall run
Windows 36, 48, 36, gaps 12 and 12, wall run 144, fullness 2, panel width wanted 50.
Rod 144, total 288, 6 panels, 48 inches each, windows plus gaps 144
Three windows, 120 inch wall run
Windows 30, 36, 30, gaps 12 and 12, wall run 120, fullness 1.5, panel width wanted 40.
Rod 120, total 180, 5 panels, 36 inches each, windows plus gaps 120
Related tools
Bay Window Curtain Planner
Plan curtains for a bay window from your own widths and wall run: whole-run rod length, panel count, panel width, stated fullness, and length style together.
Sliding Door Curtain Planner
Plan curtains for a sliding door from your own door width, wall run, and stack spaces you enter: rod or traverse length, stack space, panel count, panel width, stated fullness, and length style together.
Disclaimer: Planning aid only. Results come only from the numbers you enter. This test tool uses the wall run you enter as the rod length and adds no extension, bracket, return, or corner allowance. The brand checks below are single-window starting points from Umbra and IKEA, and those two brands differ, so they are a check, not a rule for a bay, sliding door, or multi-window wall. Corner, bracket projection, and length-drop numbers still depend on the exact hardware you buy, so check that product's sheet before you buy or drill.