Box Pleat Curtain Tutorial

For each pleat you need to add 8 inches of fabric.
Box pleat curtain tutorial. 6 30 it should say lining width face fabric width 6 inches instead of 3 inches. 3 5 3 5 4 11. Press all the pleats flat with an iron creating a 3 inch pleat so that the seam is behind the exact center of the pleat. She does a great job describing how to measure how much fabric you will need with the addition of the pleats hems etc.
So this is how i did my math. For my curtain i only wanted 1 pleat. If you are mounting your curtain on a 1 4 board you need to add 5 for the ends of the board and 8 for the pleat in the middle. I altered her tutorial just a bit and made my own box pleat curtain.
Pin your pleats so they measure 8 inches and top stitch 8 inches down on both sides of each pleat making sure to back tack at the bottom. For the box pleat curtain example the window measured 50. My board was 42 wide. My window is 46 wide.
We decided on 2 pleats so 3 sections of flat fabric. We factored in 8 per pleat an additional 3 on each side for the depth of the board to wrap around the return or the side of the board 1 2 for the 1 4 hem on each side and about a 1 2 for each end to wrap around the back of the board equaling 65 5 total in length. Return leading edge 4 for sewing the sides.