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Free curtain size calculator and curtain width calculator for perfect window treatments. Calculate curtain measurements, fabric requirements, and rod length with our professional curtain measurements calculator that considers style, mount type, and desired length.
Last updated: February 2, 2026
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Traditional gathered curtains
Mount on wall above window
Ends at window sill
Width: 54.0 inches
Length: 68.0 inches
Fullness: 2.5x
Panels: 3
Fabric Width: 135.0 inches
Rod Length: 60.0 inches
Header: 4.0 inches
Hem: 4.0 inches
For a typical 48" × 60" window with gathered curtains:
54"
Curtain Width
68"
Curtain Length
3
Fabric Panels
60"
Rod Length
Our curtain size calculator uses professional interior design principles to determine exact fabric requirements and measurements. The calculation considers window dimensions, curtain style, mounting method, and desired length to provide accurate results for any window treatment project.
Fabric Width = Window Width × Fullness RatioTotal Length = Window Height + Header + Hem + Style AdjustmentsPanels Needed = Fabric Width ÷ Standard Fabric Width (54")This formula ensures proper fullness for your chosen style while accounting for standard fabric widths and professional finishing allowances.
Shows window measurements, fullness, and mounting options
Our curtain size calculator provides comprehensive solutions for all curtain measurement needs. Whether you need to calculate curtain size, use a curtain width calculator, or determine curtain measurements, our tool handles all types of window treatment calculations with professional accuracy.
Different curtain styles require different amounts of fabric to achieve the proper look:
Planning other room improvements? Check out our TV wall mount calculator and recessed lighting calculator.
Get Custom Calculator for Your Business54"
Curtain Width
68"
Total Length
3
Fabric Panels
60"
Rod Length
Curtain Size Calculator Result: Need 3 panels of fabric, each 68" long, with a 60" curtain rod
This demonstrates how our curtain size calculator works - providing exact fabric requirements and measurements for professional window treatments!
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Suggested hashtags: #Curtains #WindowTreatments #HomeDesign #InteriorDesign #Calculator