About Nenxo
A simple curtain-size calculator built around your actual window—not a generic “standard window” guess.
What Nenxo helps you decide
Measure your window once and Nenxo turns those measurements into three practical shopping answers: the rod length to look for, how many curtain panels you need and the curtain length to aim for.
If you already found curtains in a store, you can compare up to three listings using the same window measurements. Nenxo works out whole packs, length fit and total price so a cheaper pack does not look cheaper simply because it contains fewer panels.
Why the calculator asks for wall space
A curtain rod normally extends past the window, but the room may have a corner, cabinet or other obstacle nearby. Nenxo keeps the left and right wall space separate so the result reflects the room you actually have.
What Nenxo does not pretend to know
The calculator cannot see your wall construction, rod strength, stud positions or the exact behavior of a fabric. Mounting instructions and safe fixings still come from the hardware manufacturer and your real wall.
Your measurements stay local
No account is required. Calculations run in your browser. Saving a plan uses this device, and a share link contains the measurements you chose to put in the URL.