Curtain Size Calculator
Estimate curtain panel width and length from window and rod measurements.
How this tool works
Choose curtain width and length before buying panels. CasaLabs calculators keep assumptions visible, use source-backed formulas, and avoid storing personal information.
How to use it
- Enter the rod width instead of only the window width.
- Choose a fullness multiplier.
- Enter panel count and desired finished length.
Formula
Panel width = rod width × fullness multiplier ÷ number of panels.
Example
A 72 in rod with 2× fullness and 2 panels needs about 72 in of width per panel.
Common mistakes
- Measuring only the glass instead of the rod width.
- Choosing flat panels when you want a gathered look.
- Forgetting rod height when choosing curtain length.
Assumptions
- Curtain fullness depends on style and fabric.
- Rod placement affects final curtain length.
- Panel sizes are rounded to practical store-bought dimensions.
Sources
Related calculators
FAQ
How wide should curtains be?
Curtains are often wider than the window so they look full when closed. The exact multiplier depends on the desired fullness.