DrapeCalc: Curtain Fabric

DrapeCalc is the fabric calculator for anyone who makes curtains, drapes and Roman blinds. Enter your measurements and get the widths, cut lengths and total fabric off the roll, without doing the arithmetic in your head.

CURTAINS DONE RIGHT
- Number of fabric widths from rail width, fullness and usable fabric width.
- Cut length per drop, rounded up to whole pattern repeats.
- Fullness presets for pencil, pinch (triple), wave and eyelet headings.
- Half-drop patterns handled, with the extra fabric added for you.
- Total fabric shown in metres or yards, rounded up to a sensible cutting length.

MORE THAN ONE WINDOW
- Add several windows to a project and see the combined fabric total.
- Tap any figure to copy it straight into your cutting notes.

ROMAN BLINDS
- Number of folds from your finished drop and target fold height.
- Total fabric length including headrail, hem and rod-pocket allowances.
- How many ring columns you need, and where to place them across the width.

MADE TO BE TRUSTED
- Metric or imperial, your choice.
- Clean, high-contrast display.
- Works completely offline, with nothing to sign in to and no data leaving your device.

TRY IT, THEN OWN IT
DrapeCalc is a free download. Every calculator is open for 14 days so you can run it against a real job. After that, a single in-app purchase (Workroom Unlock) keeps it working for good. No subscription and no ads. Your saved windows and settings stay on your device either way, and anyone who bought DrapeCalc before it went free keeps full access automatically.