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Calcimator

Bra Size Calculator

Calculate your bra size from band and bust measurements. Get US, UK, and EU sizes plus sister sizes.

Inputs

in
in

Results

US Bra Size

34C

Band Size34
Cup SizeC
UK Size34C
EU Size85C
Sister Size (smaller band)32D
Sister Size (larger band)36B
Bust-Band Difference3 in

US Bra Size

34C

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Band Measurement — Measure snugly around your ribcage, just under your bust. Accepts values from 24 in to 52 in (default: 34 in).
  3. Bust Measurement — Measure around the fullest part of your bust while wearing a non-padded bra. Accepts values from 26 in to 58 in (default: 37 in).
  4. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  5. US Bra Size — your calculated result. This is the primary result of this calculator.
  6. Band Size — shown as a numeric value.
  7. Cup Size — your calculated result.
  8. UK Size — your calculated result.
  9. EU Size — your calculated result.
  10. Sister Size (smaller band) — your calculated result.
  11. Sister Size (larger band) — your calculated result.
  12. Bust-Band Difference — shown as a numeric value.
  13. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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