Calculate The Number Of Fabric Width

First, you need to calculate how many widths of fabric you will need to cover the width of your window. Measure the length of the track or pole you’re using and multiply this figure by 1.5 if you plan to use standard heading tape, or by 2.5 for pencil pleat tape. Now add on 20cm overall for side hems. Divide this figure by the width of your fabric. Round up the result to the next whole number. For example, if your pole measures 200cm, multiply by 1.5 (for standard heading tape), and add on 20cm