Pattern Grading Calculator

Calculate grading increments to resize a pattern between standard sizes.

Current Pattern Size

Target Size

Measurement Point

Pattern Pieces to Grade

Results

Visualization

How It Works

Pattern grading adjusts a base pattern to create different sizes. Standard grading adds about 1 inch per size at bust, waist, and hip, but only 1/4 inch at shoulders. The total grade is distributed across all pattern pieces that share that measurement. Grading more than 2-3 sizes from the base can introduce fitting issues.