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Calcimator

Grading Rule Calculator

Calculate size grade rules from body measurement standards for pattern grading between sizes.

Inputs

in
in
in

Results

Target Bust

38 in

≈ 6 smartphones

Target Waist30 in
Target Hip40.5 in
Grade Steps3
Shoulder Grade0.75 in
Armhole Grade1.13 in
Neck Grade0.75 in
Length Grade0.75 in
Bust Half Grade1.5 in
Waist Half Grade1.5
Hip Half Grade1.5
How to Use This Calculator
  1. Select your base pattern size from the size drop-down.
  2. Select the target size you need to grade up or down to.
  3. Enter your base bust, waist, and hip measurements in inches.
  4. Review the target bust, waist, and hip measurements alongside the shoulder, armhole, neck, and length grade amounts.
  5. Use the bust, waist, and hip half-grade values to split each grade increment between the center front and side seam, then apply the increments to each pattern point with a grading ruler or CAD system.

How the result changes with Base Bust

Base BustTarget Bust
3134 in
3740 in
4649 in
5255 in

What each input means

Base Size
The base pattern size
Target Size
The target size to grade to
Base Bust
Bust measurement at the base size
Base Waist
Waist measurement at the base size
Base Hip
Hip measurement at the base size

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Base Size = 8, Target Size = 14, Base Bust = 35, Base Waist = 27 = 5 input(s) provided
  2. Calculate Target Bust
    Target Bust
    38 = 38
  3. Calculate Target Waist
    Target Waist
    30 = 30
  4. Calculate Target Hip
    Target Hip
    40.5 = 40.5

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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