Nursing Bra Size Calculator
Your body changes significantly during pregnancy and breastfeeding. Use this calculator to estimate your nursing bra size based on your pre-pregnancy measurements and current stage.
Calculate Your Nursing Bra Size
Nursing Bras vs Regular Bras
Size Changes
Expect 1-2 band sizes and 1-3 cup sizes larger than your pre-pregnancy size.
Easy Access
Nursing bras feature drop-down cups, pull-aside panels, or front clasps for easy feeding.
Extra Support
Wider straps and fuller coverage accommodate larger, heavier breasts.
Comfort Focus
Wireless designs and soft fabrics prevent milk duct compression.
Nursing Bra Fitting Tips
- Wait until 36+ weeks pregnant to buy nursing bras - your size will be closer to your postpartum size.
- Buy 2-3 bras initially; you may need different sizes as milk supply regulates.
- Choose bras with stretch fabric to accommodate daily size fluctuations.
- Avoid underwire during nursing as it can compress milk ducts and cause mastitis.
- Look for bras that can be opened with one hand for easier feeding.
When to Buy Nursing Bras
During Pregnancy
Buy 1-2 nursing bras around week 36. Choose a size larger than your current maternity bra.
Postpartum
Your size may change in the first 6 weeks. Wait until milk supply stabilizes before buying more.
Frequently Asked Questions
Can I wear a regular bra while nursing?
While possible, nursing bras are recommended. They provide easier access for feeding and better accommodate size changes.
How many nursing bras do I need?
Start with 2-3 everyday bras and 1-2 sleep bras. Add more once your size stabilizes.
Should I wear a bra while sleeping?
A soft sleep nursing bra can help with leaking and provide light support during engorgement.
Need More Help?
Try our main calculator for precise measurements or browse our guides for more fitting advice.