Measuring correctly is the key to getting curtains that hang beautifully and fit your window perfectly. Follow these simple steps to measure for curtain width and length. how to measure for curtains

1. Measure the Width

Step 1: Measure the Window

Measure the full width of your window frame from left to right.

Step 2: Add Extra Width for Fullness

Curtains should always be wider than the window to look full and elegant.

Use these fullness rules:

  • Grommet / Eyelet Curtains: 1.5× to 2× window width

  • Rod Pocket Curtains: 2× to 2.5× window width

  • Pleated Curtains: 1× to 1.5× window width

Example:
If your window is 50 inches wide → You need 75–100 inches of total curtain width.

Step 3: Decide the Number of Panels

Most curtain sets come as two panels.
Divide the total width required by the number of panels.

2. Measure the Length (Drop)

Curtain length depends on where you want the curtain to end.

Popular Curtain Length Options

• Sill Length: Ends at the window sill
• Apron Length: 4–6 inches below the sill
• Floor Length: ½–1 inch above the floor (most common)
• Puddle Length: 2–6 inches of extra fabric on the floor (luxurious)

3. Decide Rod Placement

Where you install the curtain rod affects the measurements.

Install Height

  • Standard: 4–6 inches above the window

  • To make ceilings look taller: 8–12 inches above

  • For a dramatic look: Close to the ceiling

Install Width

Extend the rod 3–6 inches beyond the window on both sides.
This allows curtains to stack off the window and make it appear wider.

4. Measure the Length Correctly

Measure from the top of the curtain rod (or the ring/clip for pleated curtains) down to your desired final length.

Curtain Style Measuring Points:

  • Grommet Curtains: From top of rod to bottom length

  • Rod Pocket Curtains: From rod to desired length

  • Pinch Pleat Curtains: From ring/clip to desired length

  • Back Tab Curtains: From top of rod to desired length

5. Tips for Perfect Measurements

  • Use a metal measuring tape for accuracy

  • Measure both sides—sometimes floors aren’t even

  • Consider shrinkage for natural fabrics like linen

  • If unsure, always size longer and wider

  • For blackout curtains, mount rod higher and wider for full coverage

Quick Formula Summary

Width:

Window width × fullness ratio = total modern curtains width

Length:

Rod height → Desired endpoint (sill, apron, floor, or puddle)