Free Tool

Grade Patterns with Point-by-Point Movements

Choose your base size and target sizes to generate professional-style grade rules: cumulative X/Y movements for each standard pattern point, plus a graded nest preview and CSV export for documentation.

Open Pattern Grading Calculator See Features
Pattern Grading Calculator showing quick grade inputs, point movement instructions, and the grade rule table

Why It’s Useful

📐

Real Grading (Not Scaling)

Outputs X/Y moves per point so proportions stay correct across sizes.

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Quick Instructions

In Quick Grade mode, get “OUT/IN” and “DOWN/UP” instructions for each point.

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Break-Point Aware

Optionally applies non-linear increments at key sizes, with warnings when you cross them.

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Nested Diagram Preview

See how sizes nest visually, and click points for movement details by size.

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Print + CSV Export

Print a grading sheet and export movements to CSV for spreadsheets and handoff.

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Runs in Your Browser

No uploads required; calculations run client-side.

Key Features

Quick Grade (One Base → One Target)

Pick a category, garment type, base size, and target size to get cumulative X/Y movements and a practical “move these points” list.

  • OUT/IN and DOWN/UP instructions
  • Fraction precision control
  • Length grading toggle
Quick Grade mode with point movement instructions and results table

Full Range Tables

Generate an entire size range at once and copy/export a single CSV report for documentation and collaboration.

  • Select target sizes
  • Base size highlighting
  • CSV download and copy
Full Range mode showing multiple sizes in the grade rule table

Interactive Point Details

Hover or click a point on the diagram to see that point’s movement by size and visually locate it across the nest.

  • Point highlight across sizes
  • Detail panel with movements
  • Works for bodice/sleeve/skirt sets
Diagram with a selected point highlighted across all sizes and a point detail panel

Common Questions

Grading. The tool outputs X/Y movements for standard pattern points, which is how professional grading maintains shape and fit across sizes.
When enabled, Y-axis movements (length/depth changes) are included. When disabled, the tool keeps all vertical movement at 0.
Break points are sizes where grade increments change. Bodies don’t grow linearly across the full range, so some systems increase increments at larger sizes.
Yes. Use Download CSV or Copy CSV to export movements, plus a print-friendly grading sheet.

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