Curtain Size & Panel Calculator
Quick answer
Width × length × fullness — the 2× rule people skip.
- Free, no sign-up, works on any device.
- Instant results with a clear explanation of each step.
Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.
Curtain Size & Panel Calculator
Width × length × fullness — the 2× rule people skip.
Step 1 of 2
The windowThe glass width drives everything — fullness multiplies it.
in
the window you are covering — the rod recommendation stacks extra on top
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