Step 1. Collect all your information
Rod length.........84
Fabric fullness......2
Finish length.......86
Hem allowance....18
Width
of fabric.....54
Pattern repeat.....27
Step 2.
Calculate the number of panels needed
Rod Length..................84
Multiply by fullness.......x 2
Total Width ............... 168
Divide by fabric width… /54
Result.....................
3.11
Round up to nearest whole number. It is
ok to round down if under .25 in some cases with light fabrics I will round up to nearest whole even number. For our example
we will round down to 3 panel cuts of fabric.
Step 3. Calculate rough cut panel lengths.
Finish
length..........86
Hem allowance.......18
Equals cut length...104
This is the length each cut of fabric needs to be if you have no pattern repeat head to the next step. If you
have a repeat, keep going.
Cut Length................... 104
Divide by repeat........... / 27
Result..........................3.85
Round up......................... 4
Multiply by repeat............ 27
Result
is length of each panel.. 108
Step 4.
Calculating the yardage.
Enter cuts from
step 2 ...................3
Enter length from
step 3.............108
Multiply cuts by length................324
Divide by .................................. 36
Total yards needed .....................
9