Home & DIY calculator
Calculate fabric widths and cut drops from pole width, fullness, hems and pattern repeat.
A 2 m pole at double fullness needs 4 m of finished width. With 140 cm fabric and 8 cm for side hems, each width gives 1.32 m, so 4 widths. A 2.2 m drop plus 30 cm of hems is cut at 2.5 m: 10 m, or 11 m with a 10% allowance.
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Measure the finished drop and the total track or pole width.
A 2 m pole at double fullness needs 4 m of finished width. With 140 cm fabric and 8 cm for side hems, each width gives 1.32 m, so 4 widths. A 2.2 m drop plus 30 cm of hems is cut at 2.5 m: 10 m, or 11 m with a 10% allowance.
| Input | Value |
|---|---|
| Pole width | 2 m |
| Finished drop | 2.2 m |
| Fullness multiplier | 2 |
| Usable fabric width | 140 cm |
| Header and hem allowance | 30 cm |
| Pattern repeat | 0 cm |
| Side hems per width | 8 cm |
| Extra allowance | 10 % |
| Pack size | 1 m |
| Result | Value |
|---|---|
| Fabric widths | 4 |
| Cut drop | 2.5 m |
| Required quantity | 11 m |
| Packs to buy | 11 |
| Purchase quantity | 11 m |
| Left over | 0 m |
No. Measure the track or pole's working width and multiply by the chosen fullness. The curtain fabric must also accommodate seams and any required overlap. The fullness ratio is an editable design assumption; the heading style and fabric instructions determine a suitable choice.
Drops may need to start at matching positions in the pattern. The calculator rounds cutting lengths to the stated repeat before counting fabric. Enter the actual cloth width and repeat, and confirm how joins and hem allowances fit your intended curtain construction.
Use the field's stated measurement and keep the extra fabric for hems and headings explicit. The finished drop and the cutting length are different quantities. Before purchasing, check how your heading style, hem depths and any pattern repeat change each drop, then count the widths needed for the chosen fullness.
Calculation/content reviewed 4 October 2026. Source: Babushka Market’s displayed formulas, units and labelled editable assumptions. How the estimates work
