How to Calculate Fabric for Curtains with Pattern Repeat
When it comes to measuring fabric for curtains with a pattern repeat, it can be a bit more complex than the standard calculation. The pattern repeat affects the way the fabric is cut and sewn, ensuring that the design aligns correctly across the curtain panels. Here’s a step-by-step guide on how to calculate fabric for curtains with a pattern repeat.
First, you need to determine the width of the fabric you plan to use. This is usually found on the fabric’s selvage, which is the finished edge of the fabric. If the selvage is not available, measure the width of the fabric at the widest point.
Next, decide on the width of your curtain panels. This will depend on the size of your window and the amount of coverage you desire. For example, if your window is 80 inches wide, you might choose to have two panels that are 40 inches each, or one panel that is 80 inches wide.
Once you have the width of your panels, you need to consider the pattern repeat. This is the distance between the same design element in the fabric. For instance, if the pattern repeat is 24 inches, it means that the design will repeat every 24 inches across the fabric.
To calculate the amount of fabric needed, follow these steps:
1. Measure the width of your curtain panels.
2. Add a seam allowance of about 1/2 inch to each side of the panel width. This accounts for the hem and any additional fabric needed for the rod pocket or heading.
3. Divide the total width of the fabric by the pattern repeat. This will give you the number of times the pattern will fit across the width of the fabric.
4. Multiply the number of pattern repeats by the width of the fabric. This will give you the total width of fabric needed for one panel.
5. Multiply the total width of fabric needed for one panel by the number of panels you plan to make.
6. Add any additional fabric for hemming, rod pocket, or heading, as needed.
For example, if you have a 40-inch wide window and you want two 40-inch wide panels, the calculation would be as follows:
1. Width of panels: 40 inches
2. Seam allowance: 40 inches + (1/2 inch x 2) = 41 inches
3. Pattern repeat: 24 inches
4. Number of pattern repeats: 40 inches / 24 inches = 1.67 (round up to 2)
5. Total width of fabric needed for one panel: 2 x 40 inches = 80 inches
6. Total width of fabric needed for two panels: 80 inches x 2 = 160 inches
7. Additional fabric for hemming, rod pocket, or heading: 2 inches (for a total of 162 inches)
Remember to also account for the length of the curtains, which will depend on the height of your window and the desired drop. Once you have the length, multiply it by the width of the fabric to get the total amount of fabric needed.
By following these steps, you can ensure that your curtains with a pattern repeat are not only beautiful but also accurately measured and cut.
