Curtain Size Calculator

Your details

Measure across the window opening from frame edge to frame edge.
in
Measure from the top of the window frame to the sill (or floor if floor-length).
in
How far above the top of the window frame the rod will sit. Typically 4-6 inches (10-15 cm).
in
How far the rod extends past the window on each side. Typically 3-8 inches (8-20 cm).
in
Where the curtain hem falls relative to the floor or window sill.
The heading style affects the fullness multiplier and the heading allowance added to the drop.
How much wider the fabric should be than the rod. 2x is the WCAA standard for a balanced look.
Most windows use 2 panels. 4 panels suit very wide windows or a layered look.
Double-fold bottom hem. 4 inches (10 cm) is standard for a quality finish.
in
Vertical repeat of the fabric pattern. Enter 0 for plain or unpatterned fabric.
in
Optional. Enter the price to get an estimated fabric cost. Leave at 0 to skip.
$/yd
Width of the fabric bolt. Standard fabric is 54 in (137 cm) or 60 in (150 cm) wide.
in
Rod width
72

Total rod length needed (window width + both side extensions)

Per-panel width (finished)72
Panel length (finished drop)58
Cut length per panel63.5
Fabric drops per panel2
Total fabric needed7.06
Rod width72
Panel width (each)72
Panel length58
Cut length63.5

You need 2 panel(s), each cut at 63.5 in long.

  • Your rod needs to be 72.0 in wide. Each of the 2 panel(s) should finish at 72.0 in wide.
  • Each panel needs 2 fabric widths joined together to reach the required finished width.
  • Each panel is cut at 63.5 in, which includes the heading and hem allowances.
  • Buy at least 7.06 yd of fabric in total, plus a small safety margin.
  • Eyelet/grommet headings hang in soft, uniform folds and work well on lightweight to medium-weight fabrics.

Next stepAlways buy 10-15% extra fabric to allow for cutting mistakes, shrinkage after washing, and future repairs.

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