Maternity Bra Size Calculator

Find your maternity bra size by trimester with band and cup adjustments.

Inputs

Results

Maternity Bra Size

30G

Trimester

2

How to use this calculator
  1. 1Measure underbust and bust in cm (or convert from inches: × 2.54).
  2. 2Select your current trimester.
  3. 3Use the suggested size as a starting point — try bras on when possible.
Frequently Asked Questions
How to Use

About the Maternity Bra Size Calculator

What it calculates

Estimates maternity bra size by trimester, adjusting band and bust for typical pregnancy growth.

When to use it

Use when shopping for maternity or nursing bras, especially in the 2nd and 3rd trimester when size changes quickly.

Example

Pre-pregnancy 34C with 2nd-trimester measurements may suggest sizing up band and cup.

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