Zipper Length Calculator
Get the right zipper length for any project
🌓
Project Type
Dress (Back Zipper)
Dress (Side Zipper)
Skirt
Pants / Trousers
Jacket / Coat (Separating)
Cushion / Pillow
Bag / Pouch
Custom Opening
Unit
Inches
Centimeters
Calculate Zipper Length
Standard Zipper Lengths
Project
Typical Length
Zipper Type
Skirt (short)
7" / 18cm
Invisible
Skirt (midi/long)
9" / 23cm
Invisible
Dress (back)
14-22" / 36-56cm
Invisible
Pants fly
7-9" / 18-23cm
Metal or Coil
Jacket
20-30" / 51-76cm
Separating
Cushion 16"
14" / 36cm
Regular coil
Cushion 20"
18" / 46cm
Regular coil
Tip:
Always buy a zipper 1-2 inches longer than calculated. You can shorten a zipper but cannot lengthen one. For invisible zippers, add an extra inch for the seam allowance at the top.