Bra Size Estimator

Bra Size Calculator – Find Your Perfect Fit

Our free bra size calculator removes the guesswork from bra shopping. Measure quickly in inches or centimeters and discover your ideal fit. No more discomfort or confusion—just reliable guidance and instant results!

Easy Bra Size Calculator

Input your band and bust measurements to get your accurate bra size in seconds.

Bust size must be larger than band size.

How to Measure for Bra Size

  • Underbust (Band Size): Measure directly under your bust using a measuring tape, keeping it snug and level.
  • Overbust (Bust Size): Measure around the fullest part of your bust while keeping the tape comfortably loose.
  • Use the sliders in the tool above to enter these values in centimeters (cm).
  • Your bra size will be calculated based on these two inputs.

Band Size Chart

Underbust Range (cm) Band Size
63 – 67 30
68 – 72 32
73 – 77 34
78 – 82 36
83 – 87 38
88 – 92 40

Cup Size Chart (Bust - Underbust Difference)

Difference (cm) Cup Size
11 – 13 A
13 – 15 B
15 – 17 C
17 – 19 D
19 – 21 DD
21 and above E+

Frequently Asked Questions

Use a soft tape: measure your band just under the bust, then your bust at the fullest point. Enter both numbers in the calculator above. Need more help? See our How to Measure guide below!
If your measurement falls between sizes, try your best fit and the next size up or down. Comfort and support should be your guide. Use the calculator for a recommendation.
Cup size is the difference between bust and band measurements. Each letter represents one inch of difference. For example, a 3-inch difference is a C cup. More details in the fitting guide below!

How to Measure Your Bra Size at Home

  1. 1
    Band Size: With a soft tape, measure snugly around your ribcage, just under your bust. Keep the tape parallel to the floor.
  2. 2
    Bust Size: Measure over the fullest part of your bust. Stand normally and avoid pulling the tape too tightly.
  3. 3
    Calculate: Subtract your band from your bust measurement. Use the calculator above or reference a bra size chart.

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Bra Size Chart & Fitting Tips for Accurate Measurement

Finding your bra size is crucial for everyday comfort and confidence. Many women unknowingly wear the wrong size, leading to discomfort, poor posture, and visible lines beneath clothes. A well-fitting bra offers the right support, smooths your silhouette, and ensures you look and feel your best.

Use our online bra size calculator for an instant, precise fit—no need for guesswork. Just measure, input your numbers, and get an accurate result. Avoid common mistakes: wearing bands that are too loose (which rides up your back), choosing cups that gape or squeeze, or never updating your size after body changes.

For best results, measure yourself every 6–12 months, after weight changes, pregnancy, or switching brands. Refer to our step-by-step guide or blog for more tips. Use a bra measurement guide and double-check your size with our bra size chart—your comfort is worth it!

Say goodbye to uncertainty and hello to everyday comfort. Try our bra size estimator and experience your best fit ever!

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