Studio Matrx Monthly · Volume 1 · Issue 1 · June 2026
Amogh N P
 In loving memory of Amogh N P — Architect · Designer · Visionary 
Drapery Calculator

Curtain Fabric Quantity Calculator

Work out exactly how many metres of fabric a window needs — track width, drop, heading fullness, roll width and pattern repeat. This is the proper drapery calc tailors actually use.

Your window

At 2× fullness, this window needs 3 fabric widths of 137 cm cloth. No pattern repeat, so each drop is cut to the exact length.

Fabric required

0.0 m

Buy about 8.7 m with a ~10% buffer for squaring, shrinkage and matching.

Widths needed

3

at 2× fullness

Cut length / drop

265 cm

2.65 m each

Roll width

137 cm

Pattern-repeat wastage

0.00 m

no repeat

Honest note: a pattern repeat adds real wastage — every drop is rounded up so prints align, and the offcuts are usually unusable. Always buy ~10% extra. Roll widths vary: standard drapery is often 137 cm, while wide-width sheers can be 280 cm and may need fewer widths.

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