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Curtain Size Calculator
Get the perfect curtain measurements for your windows
Window Measurements
Inches
Centimeters
Window Width (
in
)
Window Height (
in
)
Options
Mount Type
Inside Mount
Outside Mount
Fullness Factor
1.5x — Standard
2x — Luxury
2.5x — Extra Full
Curtain Length Style
Sill Length (at window sill)
Below Sill (+4″/10 cm)
Floor Length (−0.5″/1 cm clearance)
Puddle (+2″/5 cm on floor)
Number of Panels
1 Panel
2 Panels
3 Panels
4 Panels
Rod Extension Each Side (
in
)
Calculate Curtain Size
Your Curtain Measurements
--
Width Per Panel
--
Curtain Length
--
Recommended Rod Width
--
Total Fabric Needed
Hanging Tips
Mount the rod
4–6 inches above
the window frame (or at the ceiling) to make windows appear taller.
Extend the rod
3–6 inches beyond
each side so curtains can stack off the glass when open.
For
inside mount
, measure inside the frame at top, middle, and bottom — use the narrowest width.
Add
1–2 inches
for hems and headers when buying raw fabric (already included in total above).
Heavier fabrics (velvet, lined drapes) need sturdier rods and brackets every 30–36 inches.
Iron or steam curtains before hanging for a polished look.