Input Measurements
Live Auto-Calculation
Output Summary
Verified Spec
Calculating...
Initial output value
Panels Required
4 Panels (2 per side)
Cut Length Per Panel
96.0" (incl. hems)
Total Gathered Width
144" (2.0x Fullness)
Pattern Match Rule
Solid / Non-repeat
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How to Use the Curtain & Drapery Yardage Calculator
- Select your desired options and garment / fabric specifications from the input fields above.
- Enter your measurements with high precision using the labeled unit selectors (inches, centimeters, or grams).
- Review the live calculation summary in the prominent result card to confirm fabric yardage, cuts, or conversions.
- Use the "Copy Specification" button to save your cutting specification to your tech pack or pattern notes.
Documented Textile Industry Formula
Drapery Yardage Formulas
- 1. Total Fabric Width = Rod Width × Fullness Multiplier
- 2. Number of Panels = Total Fabric Width / Usable Fabric Width (rounded up)
- 3. Cut Length per Panel = Finished Length + Header Allowance (4 in) + Bottom Hem (8 in double hem)
- 4. Pattern Repeat Adjustment: Cut Length rounded up to the nearest multiple of the vertical repeat
- 5. Total Yardage = (Number of Panels × Adjusted Cut Length) / 36 inches
Worked Calculation Example
Real-World Scenario: A 72-inch wide curtain rod with an 84-inch floor-length drop, 2.0x standard fullness, using 54-inch solid fabric.
- • Total Width = 72 in × 2.0 = 144 inches of gathered fabric width
- • Panels Needed = 144 in / 54 in = 2.67 ➔ Rounded up to 3 or 4 panels (2 panels per side for a pair = 4 total panels)
- • Cut Length per Panel = 84 in + 4 in (Header) + 8 in (Double 4-inch Hem) = 96 inches
- • Total Fabric Needed = 4 panels × 96 inches = 384 inches / 36 = 10.67 Yards
You need 11.0 yards of 54-inch wide drapery fabric for a full, luxurious pair of curtains.
Frequently Asked Questions
What is the standard fullness ratio for curtains?
2.0x fullness is the universal interior design standard for residential curtains. 1.5x fullness gives a flat, minimalist look, while 2.5x to 3.0x is used for luxurious pinch pleats or lightweight sheer drapes.
How much extra fabric should I add for curtain hems?
Professional drapery uses a double 4-inch bottom hem (adding 8 inches of fabric) and a 3-to-4 inch top header. This gives custom weight and ensures the drapery hangs straight without curling.
How do I account for fabric pattern repeats?
For patterned fabrics, divide your calculated cut length by the vertical repeat height, round up to the next whole number, and multiply back. This ensures each panel starts at the identical motif point.