Input Measurements
Live Auto-Calculation
Output Summary
Verified Spec
Calculating...
Initial output value
Face Cut Dimensions
40.0" × 66.5" cut size
Lining Fabric Required
1.78 Yards (standard)
Pleat / Rod Pocket Count
7 Rod Pockets / Folds
Panel Seaming Rule
Seamless single panel
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Fabricating Roman shades? Pair this calculation with verified child-safe cord safety mechanisms and fiberglass ribs.
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How to Use the Roman Blind Fabric 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
Roman Shade Cutting Formulas
- 1. Cut Width = Finished Width + 4 inches (2-inch side hems on left and right).
- 2. Cut Length = Finished Drop + 6.5 inches (2" hook-and-loop top turn + 4.5" bottom bar hem).
- 3. Pleat / Rod Pocket Count = Round(Finished Drop / 8 inches) - 1 folds.
- 4. Lining Cut Width = Finished Width, Cut Length = Finished Drop + 4 inches.
- 5. Face Yardage = Cut Length / 36 (or scaled to vertical pattern repeats).
Worked Calculation Example
Real-World Scenario: A custom 36" wide by 60" long Roman blind using 54-inch solid drapery fabric.
- • Cut Width = 36" + 4" side hems = 40.0 inches (fits seamless on 54" roll)
- • Cut Length = 60" + 6.5" top/bottom hems = 66.5 inches
- • Pleat Folds = 60 / 8 = 7 fold sections (6 fiberglass rods required)
- • Fabric Yardage = 66.5 / 36 = 1.85 Yards of face fabric and 1.80 Yards of lining
Order 2.0 yards of face fabric and 2.0 yards of lining.
Frequently Asked Questions
How many pleats should a Roman blind have?
A standard Roman shade has pleats spaced 8 to 10 inches (20 to 25 cm) apart. A 60-inch drop shade typically features 6 to 7 folds, stacking neatly into a 9 to 11-inch head when pulled fully open.
Do I need blackout lining for Roman blinds?
Blackout lining is strongly recommended for bedrooms and nurseries because it prevents horizontal rod pocket stitch shadows from showing through when illuminated by sunlight.
Can I make a Roman blind wider than 54 inches?
Yes, but it requires seaming two fabric widths together. Workroom standards dictate placing a full 54" panel in the center and two equal width extension strips on the left and right outer edges so seams do not run down the middle.