Pattern Scale Calculator
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Scale a pattern dimension up or down by percentage — useful for print scaling and grading.
Dimension & scale
Scaled dimension
26.4
24 at 110%
- Change
- 2.4 (10%)
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Scaling patterns
Pattern scaling multiplies every measurement by the same factor so proportions stay the same. To scale a pattern from 100% to 110%, multiply each dimension by 1.10. Scaling on a home printer uses the print dialog percentage — verify a known reference square after printing.
Grading between sizes is more complex than uniform scaling — different body areas change at different rates. Use uniform scale for dolls, pets, or quick mock-ups; use a multi-size pattern or sloper for wearable grading.
Example: a 24-inch hip line at 104% scale becomes 24 × 1.04 = 24.96 inches. At 85% scale, a 10 cm square block becomes 8.5 cm.
Common questions
Can I scale only one dimension?
This tool scales uniformly. Stretching one dimension only changes proportions — that is pattern alteration, not scaling.
How do I scale a PDF pattern?
Print at the desired percentage in your PDF viewer, or measure a test square and adjust until it matches the pattern's stated size.