1. What is Curtain Length Calculation?

The curtain length calculation determines the total fabric length needed for curtains by adding the visible drop (length from rod to hem), header allowance (for mounting above the rod), and hem allowance (for the bottom fold).

2. How Does the Calculator Work?

The calculator uses the curtain length formula:

Where:

• \( Drop \) — Visible length from rod to hem (cm)
• \( Header Allowance \) — Additional length above rod (cm)
• \( Hem Allowance \) — Additional length for bottom fold (cm)

Explanation: The formula accounts for all components needed to create properly sized curtains that hang correctly.

3. Importance of Accurate Measurements

Details: Precise curtain length calculation ensures proper window coverage, aesthetic appearance, and avoids fabric waste or shortages during curtain making.

4. Using the Calculator

Tips: Measure carefully in centimeters. Drop is typically window height plus desired overhang. Header allowance depends on curtain style (3-15cm). Hem allowance is usually 5-10cm.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical header allowance?
A: For standard rod pockets, 3-5cm. For pencil pleats, 8-10cm. For eyelet curtains, 10-15cm.

Q2: Should I add extra length for fullness?
A: No, this calculation is for length only. Fabric width should be 1.5-3× window width for proper fullness.

Q3: How much should curtains puddle on the floor?
A: For puddled look, add 10-30cm to drop. For floor-length without puddling, add 1-2cm.

Q4: Do I need to pre-wash fabric before measuring?
A: Yes, especially natural fibers that may shrink. Wash and press fabric before final measurements.

Q5: How do I measure for bay windows?
A: Measure each section separately, accounting for angles. Consider track systems for complex bays.