Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Sewing
Buttonhole Spacing Calculator
Calculate the center-to-center distance between buttonholes on a placket for evenly spaced results. Use it whenever adding buttons to a shirt, cardigan, blouse, jacket, or any faced opening.
Fill in the required fields to see your result.
Sewing
Hem Allowance Calculator
Compute the total fabric cut length needed for a garment with a chosen hem depth and a top seam allowance, so the finished length matches the design. Useful for skirts, trousers, curtains, and any project where precise length matters.
Fill in the required fields to see your result.
Key differences
| Buttonhole Spacing Calculator | Hem Allowance Calculator | |
|---|---|---|
| Category | Sewing | Sewing |
| Inputs required | 4 | 3 |
| Result | Spacing Between Buttonholes (inches) | Total Cutting Length (inches) |
| What it does | Calculate the center-to-center distance between buttonholes on a placket for evenly spaced results. Use it whenever adding buttons to a shirt, cardigan, blouse, jacket, or any faced opening. | Compute the total fabric cut length needed for a garment with a chosen hem depth and a top seam allowance, so the finished length matches the design. Useful for skirts, trousers, curtains, and any project where precise length matters. |