Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Sewing
Pattern Scaling Calculator
Compute scaled pattern dimensions when you need to enlarge or reduce a sewing pattern by a percentage. Useful for grading between sizes, copying patterns at non-standard scale, or fitting a pattern to non-standard body proportions.
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
| Pattern Scaling Calculator | Hem Allowance Calculator | |
|---|---|---|
| Category | Sewing | Sewing |
| Inputs required | 2 | 3 |
| Result | New Pattern Dimension (inches) | Total Cutting Length (inches) |
| What it does | Compute scaled pattern dimensions when you need to enlarge or reduce a sewing pattern by a percentage. Useful for grading between sizes, copying patterns at non-standard scale, or fitting a pattern to non-standard body proportions. | 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. |