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PLACE & PROPORTIONKnow what fits. Know where it goes.
Find My Perfect Size
Personalized sizing + placement

Find the right curtain size for your windows.

Measure once. Shop confidently. Hang it right.
Tell us about your windows and wall space. We’ll recommend curtain length, rod width, fullness, panel count, and practical placement measurements.
Warm living room with properly placed full-length curtains

1. Tell us about your windows

What type of window treatment?
What are you treating?
Outside width of the trim.
Is there furniture in front of the window?
Add anything that affects how the curtains hang or how much space is available in front of the window.
Buffet / sideboard
Console table
Bench
Sofa / loveseat
Chair
Plant / planter
Kitchen sink + base cabinet
Have your own furniture?
Upload a straight-on photo or PNG and we’ll place it in See It in Your Room.
Decorating guidance only. Confirm wall construction, rod/bracket limits, and manufacturer instructions before installation.

See it in your room

Start with the sample room below, or upload a straight-on photo of your own window wall. Drag the curtains anywhere you want, then use the sizing controls to fine-tune the preview.

Your roomChoose the background you want to use for the preview.
Your curtainsSee how the curtain size recommended in your personalized plan will look with your window measurements.
Fine-tune the preview: click any window, curtain panel, rod, or furniture item in the room, then drag it or use the editing controls below.
Preview scaled to your measurements
We’ll size the windows and treatments below using the measurements from your plan.
Change your window measurements above and this preview will update automatically.
Window + curtains
Room preview
Use the sample room or upload a straight-on photo of your own window wall.
Curtain preview
100%
Upload a room photo to begin. You can still drag and resize the mock treatment manually before calibration.
Shop pieces for your plan

Shop your curtain plan

Recommendations update to match your curtain treatment and window setup.

Curtains + hardware
Helpful finishing tools
Finish This Room

A few complementary pieces to help the window treatment feel at home in the whole room.

Affiliate disclosure: As an Amazon Associate, Place & Proportion may earn from qualifying purchases at no additional cost to you.

How to Choose the Right Curtain Size

Curtains usually look best when the rod extends beyond the window instead of ending at the trim. Extra rod width gives the panels somewhere to stack when open and helps the window feel larger. Curtain length depends on your ceiling, window position and the look you want, while fullness determines how generous the fabric looks when the curtains are closed.

How Wide Should Curtains Be?

Think about the total finished width of the curtain panels, not just the width of the window. The calculator uses your window measurements and treatment style to suggest rod width, fullness and panel count so you have practical sizes to shop for.

How Long Should Curtains Be?

Full-length curtains are commonly planned to finish near the floor, but the best length depends on where the rod is mounted. Cafe curtains and valances use different proportions, which is why this tool lets you choose the treatment before calculating the size.

One Curtain Rod Across Multiple Windows?

Closely spaced windows can often be treated as one larger composition, while wider gaps may look better with separate treatments. Use the multiple-window options above to compare the overall proportion before buying rods or panels.

Frequently Asked Questions

How far should a curtain rod extend past a window?

Extending the rod beyond the window trim gives open panels room to stack and can make the window appear wider. The ideal extension depends on the available wall space.

Should curtains touch the floor?

For full-length curtains, a floor-skimming finish is a versatile choice. The exact length depends on rod height and whether you prefer a crisp, floating or slightly pooled look.

How many curtain panels do I need?

Panel count depends on the total rod width, the width of each panel and the amount of fullness you want. Use the calculator above for a recommendation based on your measurements.