Curtain Width Calculator
Find the flat width and the number of equal panels or fabric widths, without calculating drop or yardage.
Calculator
Calculated in your browser. These measurements are not sent to the server.
Result
- Total flat width
- 160 in (406.4 cm)
- Count per side
- 2
- Total fabric widths
- 4
This page stops at flat width and panel or width count. It does not calculate drop, pattern repeat, or yardage.
A pair uses the same count on the left and the right.
Returns are entered per side and added twice. Center overlap is the total overlap, added once.
Width plan
Yardage is not calculated on this page.
Flat width160 in (406.4 cm)
Divisor54 in (137.16 cm)
Per side2
Total4 fabric widths
| Flat width | Divisor | Per side | Total |
|---|---|---|---|
| 160 in (406.4 cm) | 54 in (137.16 cm) | 2 | 4 fabric widths |
How this calculation works
Required flat width uses the same fullness, return, and overlap inputs as the fabric calculator.
Fabric-width mode divides by the usable cloth width. Panel-width mode divides by the flat width you want each panel to be.
Pair mode rounds each side up separately. This page stops there. Cut length and yardage stay on the curtain fabric calculator.
Worked example
80 in rod at 2× on 54 in fabric
The pair needs 160 in of flat fabric, 80 in on each side.
Each side needs two fabric widths.
The total is four widths, not three.
Assumptions and limitations
- Returns are per side and are added twice. Center overlap is a single total.
- A pair is symmetrical.
- No pattern repeat, hem, heading allowance, or purchase length is calculated here.
- Asymmetric panels are not supported.
Common questions
When should I use this instead of the fabric calculator?
Use it when you only need the width count or panel count. Open the fabric calculator when you also know the drop.
What is panel-width mode?
It divides the flat requirement by a finished panel width you choose, instead of by the width of the cloth.