Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Sewing
Zipper Length Calculator
Finds the correct zipper length to order for any garment opening, factoring in stop allowances and seam allowances. Use it when sewing a dress, skirt, or bag to avoid buying the wrong size.
Fill in the required fields to see your result.
Sewing
Elastic Length Calculator
Compute the cut length of elastic for a waistband, cuff, or casing so it grips comfortably without cutting in or sliding. Useful for any garment with an elastic-pull-on closure: PJ pants, leggings, gathered skirts, sleeve cuffs.
Fill in the required fields to see your result.
Key differences
| Zipper Length Calculator | Elastic Length Calculator | |
|---|---|---|
| Category | Sewing | Sewing |
| Inputs required | 5 | 3 |
| Result | Recommended Zipper Length (inches) | Elastic Length Needed (inches) |
| What it does | Finds the correct zipper length to order for any garment opening, factoring in stop allowances and seam allowances. Use it when sewing a dress, skirt, or bag to avoid buying the wrong size. | Compute the cut length of elastic for a waistband, cuff, or casing so it grips comfortably without cutting in or sliding. Useful for any garment with an elastic-pull-on closure: PJ pants, leggings, gathered skirts, sleeve cuffs. |