Custom Fit Adjustment Calculator

Calculate pattern adjustments at bust, waist, and hip by comparing your body measurements to the pattern. Get per-seam adjustments for accurate fitting.

Inputs

Body Bust

Body Waist

Body Hip

Pattern Bust

Pattern Waist

Pattern Hip

Tab to move between fields

Results

Bust Adjustment

2 in

Waist Adjustment

4 in

Hip Adjustment

2 in

Bust per Seam0.5 in

Waist per Seam1 in

Hip per Seam0.5 in

Total Alteration8 in

Bust With Ease5

Waist With Ease5.5

Hip With Ease4.5

How to Use This Calculator

Enter your actual body measurements: bust, waist, and hip circumferences in inches.
Enter the pattern's standard measurements for the same size.
Review adjustments needed for bust, waist, and hip -- both total adjustment and per-side amount.
Apply adjustments to the pattern tissue before cutting fabric to ensure accurate fit.
Re-measure after fitting a muslin (test garment) -- body measurements alone don't capture posture adjustments.

How the result changes with Body Bust

Body Bust	Bust Adjustment	Waist Adjustment	Hip Adjustment
31	-5 in	4 in	2 in
39	3 in	4 in	2 in
49	13 in	4 in	2 in
57	21 in	4 in	2 in

What each input means

Body Bust: Your bust circumference measurement
Body Waist: Your natural waist circumference measurement
Body Hip: Your hip circumference measurement at the widest point
Pattern Bust: Bust measurement on the pattern (finished garment, not body)
Pattern Waist: Waist measurement on the pattern
Pattern Hip: Hip measurement on the pattern

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Body Bust = 38, Body Waist = 32, Body Hip = 40, Pattern Bust = 36 = 6 input(s) provided
Calculate Bust Adjustment
Bust Adjustment
2 = 2
Calculate Waist Adjustment
Waist Adjustment
4 = 4
Calculate Hip Adjustment
Hip Adjustment
2 = 2
Calculate Bust per Seam
Bust per Seam
0.5 = 0.5
Calculate Waist per Seam
Waist per Seam
1 = 1

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Sewing & Tailoring

Pattern Grading Calculator

Calculate adjusted measurements for grading sewing patterns between sizes. Get proportional adjustments for bust, waist, hip, shoulder, and sleeve.

Sewing & Tailoring

Seam Allowance Calculator

Calculate the total extra fabric needed for seam allowances across all pattern pieces. Enter piece count, seam allowance width, and total seam length.

Fashion & Clothing