Curtain Fabric Calculator

Calculate total yardage for curtain panels including fullness, hems, and heading allowances.

Window Width (inches)

Window Height / Drop (inches)

Number of Panels

Fullness Factor

Heading Type

Fabric Width (inches)

Bottom Hem Allowance (inches)

Top Hem/Seam Allowance (inches)

Include lining yardage

Results are estimates. Always add extra for shrinkage, mistakes, and pattern matching.

How to Use the Curtain Fabric Calculator

Enter your window measurements and preferences. The calculator handles all the math for fullness, hems, and heading allowances.

Key Terms

Window Width: Measure your rod from end to end, not just the window glass.
Drop: Distance from rod to where curtain should end (floor, sill, or apron).
Fullness Factor: How gathered/full the curtains will look. 2× is standard for most fabrics.
Heading: The top treatment. Rod pocket and tab-top need extra fabric for the pocket/tabs.

Fullness Guide

Factor	Look	Best For
1.5×	Minimal gather	Sheer fabrics, modern style
2×	Standard	Most fabrics and styles
2.5×	Full	Heavier fabrics, formal look
3×	Very full	Luxurious draping, velvet/silk

About this Curtain Fabric Calculator

Use this free Curtain Fabric Calculator to get quick, accurate results directly in your browser. It is designed for everyday use with no signup, no downloads, and no account required. No signup is required, and the tool works on phones, tablets, and desktop browsers.