FBA & SBA Calculator
Calculate your Full Bust Adjustment (FBA) or Small Bust Adjustment (SBA). Enter your measurements to find out if you need a pattern adjustment.
Measure around your torso, just above the bust line, under the arms.
Measure around the fullest part of the bust.
Advanced Mode
Enter your pattern's actual bust measurement instead of using cup estimation.
Calculation results will appear here.
Need full size grading? Try the Grading Calculator
Open Grading Calculator →