Curtain Size Calculator

Estimate curtain width and length from window size, fullness, and hanging style.

Category: Life Tools

When to use?

Use it before buying curtains to choose a width and drop that fits the window and desired fullness.

How to use

  • Enter window width and height.
  • Choose fullness and hanging style.
  • Check recommended curtain size.

Input Explanation

Enter window dimensions and choose how full or gathered the curtain should look.

Calculation Basis

Recommended width = window width × fullness factor, plus side margin if needed.

Usage Examples

  • Curtain purchase - Estimate the right panel width before ordering.
  • Fullness comparison - Compare flat, moderate, and rich gathered looks.
  • Room styling - Choose length based on sill, below-sill, or floor style.

Examples

  • Window 180 cm, 1.5× fullness → 270 cm curtain width
  • Floor-length style → longer drop estimate

Cautions

  • This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.

Guides

Fullness factor

Curtains usually need more fabric width than the window itself. A 1.5x to 2x fullness factor creates natural folds.

Measure from the hanging point

Curtain length should be measured from the rod or rail position to the target bottom point, not just the window height.

FAQ

What is fullness?

Fullness is extra fabric width that creates folds and drape.

Should curtains be wider than the window?

Usually yes, for coverage and visual fullness.

Does rod height matter?

Yes, measure from the actual hanging point to the desired bottom.

Related Tools