MEASURED, NOT GUESSED

Find curtains that fit the window.

Turn real window measurements into finished curtain width, panel width, drop, and rod length. Every assumption stays visible and adjustable.

in + cm live diagram no sign-up

CURTAIN SIZE CALCULATOR

What are you measuring?

Window width

Window height

Rod past each side

Rod above window

Measured hanging point to endpoint

Fullness

Panels

Header style

72 in rod

Required total flat width144 in total

72 in flat width per panel × 2

Finished length84 in

Suggested rod72 in

Uses your 2× fullness and 6 in side extension. Finished length is the measured hanging-point-to-endpoint value you entered.

Open the detailed calculator

MULTI-WINDOW PROJECT

Keep every window in one quantity sheet

Saved only in this browser unless you export the JSON file. Browser storage can be cleared and is not a backup.

Project nameWindow name

Add a measured window to begin the project sheet.

A PRACTICAL WINDOW WORKBENCH

Start with the number you need.

01Curtain fullnessCompare heading-specific ratios 02Fabric yardageInclude hems and pattern repeat 03Rod or pole lengthPlan extension and stack-back

Convention, not code. Curtain dimensions are commercial conventions and design recommendations—not universal standards. Measure the actual window and verify the selected product before ordering.

Method reviewed September 1, 2026