Patroon Grading Calculator

How to Use

1. Enter the current body measurements the pattern is sized for (bust, waist, hip in cm).
2. Enter the target body measurements you want to grade to.
3. Enter the pattern base dimensions as printed on the pattern envelope.
4. Click Calculate to see the grade rule table with adjustments at each grading point.
5. Apply the adjustments to your pattern pieces at the indicated locations.
6. Always make a muslin toile to verify the graded pattern before cutting fashion fabric.