Pattern Scaling Calculator

Work out pattern scaling instantly with clear inputs, formula shown and shareable results.

About Pattern Scaling Calculator

Uniform scaling multiplies every pattern dimension by the ratio of your measurement to the pattern's, which is also the photocopier percentage to use. Uniform scaling changes length as well as width, so it works for small adjustments but proper grading moves each seam by its own increment.

Formulas

Scale factor

factor = your measurement / pattern measurement

Scaled dimension

new dimension = pattern dimension x factor

Worked example

With the default values below, Pattern Scaling Calculator returns Scaled piece dimension of 65.45. Change any input above and every figure here is recalculated in your browser.

Inputs used

Pattern's body measurementminimum 1 cm: 88 cm
Your body measurementminimum 1 cm: 96 cm
Pattern piece dimension to scaleminimum 0.1 cm: 60 cm

Results

Scaled piece dimension: 65.45 cm
Scale factor: 1.09091 x
Photocopier enlargement setting: 109.09%
Change in that dimension: 5.45 cm

Step by step

1Values used
2Scale factor
3Scaled dimension
4Scaled piece dimension= 65.45 cm
5Scale factor= 1.09091 x
6Photocopier enlargement setting= 109.09
7Change in that dimension= 5.45 cm

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 5 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Pattern Scaling figure worked out?

factor = your measurement / pattern measurement. Uniform scaling multiplies every pattern dimension by the ratio of your measurement to the pattern's, which is also the photocopier percentage to use.

Why does this matter?

Uniform scaling changes length as well as width, so it works for small adjustments but proper grading moves each seam by its own increment.

What do I need to enter?

Enter pattern's body measurement, your body measurement, pattern piece dimension to scale. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.