Bra Measurement Calculator

Bra Measurement Calculator

function calculateBraSize() { var underbust = parseFloat(document.getElementById('underbustMeasurement').value); var fullestBust = parseFloat(document.getElementById('fullestBustMeasurement').value); var resultDiv = document.getElementById('result'); // Input validation if (isNaN(underbust) || isNaN(fullestBust) || underbust <= 0 || fullestBust <= 0) { resultDiv.innerHTML = 'Please enter valid positive numbers for both measurements.'; return; } if (fullestBust < underbust) { resultDiv.innerHTML = 'Your fullest bust measurement cannot be less than your underbust measurement. Please re-measure.'; return; } // Calculate Band Size var bandSize; if (underbust % 2 === 0) { // If even bandSize = underbust; } else { // If odd, round up to the next even number bandSize = underbust + 1; } // Ensure band size is a common bra size (usually even numbers) bandSize = Math.round(bandSize); // Round to nearest whole number first if (bandSize % 2 !== 0) { // If it's still odd, make it even bandSize++; } // Common bra band sizes start from 28, 30, 32… if (bandSize < 28) { bandSize = 28; // Set a minimum reasonable band size } // Calculate Cup Size var cupDifference = fullestBust – underbust; var cupSizeLetter = ''; if (cupDifference = 0.5 && cupDifference = 1.5 && cupDifference = 2.5 && cupDifference = 3.5 && cupDifference = 4.5 && cupDifference = 5.5 && cupDifference = 6.5 && cupDifference = 7.5 && cupDifference = 8.5 && cupDifference = 9.5 && cupDifference = 10.5 && cupDifference < 11.5) { // 10.5 to 11.49 inches cupSizeLetter = 'K'; } else { cupSizeLetter = 'L or larger (consult a specialist)'; } resultDiv.innerHTML = '

Your Estimated Bra Size:

' + 'Band Size: ' + bandSize + " + 'Cup Size: ' + cupSizeLetter + " + 'This is an estimate. Bra sizing can vary between brands. Always try on bras to ensure the best fit.'; } .calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; border: 1px solid #ddd; border-radius: 8px; padding: 25px; max-width: 500px; margin: 20px auto; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); } .calculator-container h2 { text-align: center; color: #333; margin-bottom: 25px; font-size: 1.8em; } .calculator-content { display: flex; flex-direction: column; gap: 15px; } .input-group { display: flex; flex-direction: column; } .input-group label { margin-bottom: 8px; font-weight: bold; color: #555; font-size: 0.95em; } .input-group input[type="number"] { padding: 12px; border: 1px solid #ccc; border-radius: 5px; font-size: 1em; width: 100%; box-sizing: border-box; } .input-group input[type="number"]:focus { border-color: #007bff; outline: none; box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25); } .calculate-button { background-color: #28a745; color: white; padding: 14px 20px; border: none; border-radius: 5px; cursor: pointer; font-size: 1.1em; font-weight: bold; margin-top: 15px; transition: background-color 0.3s ease, transform 0.2s ease; } .calculate-button:hover { background-color: #218838; transform: translateY(-1px); } .calculate-button:active { background-color: #1e7e34; transform: translateY(0); } .result-container { margin-top: 25px; padding: 20px; background-color: #e9f7ef; border: 1px solid #d4edda; border-radius: 8px; text-align: center; font-size: 1.1em; color: #155724; } .result-container h3 { color: #155724; margin-top: 0; margin-bottom: 15px; font-size: 1.5em; } .result-container p { margin-bottom: 10px; line-height: 1.6; } .result-container p strong { color: #0f3d1a; } .result-container .note { font-size: 0.9em; color: #386d4a; margin-top: 15px; font-style: italic; } .result-container .error { color: #dc3545; font-weight: bold; background-color: #f8d7da; border-color: #f5c6cb; padding: 10px; border-radius: 5px; }

Understanding Your Bra Size: A Comprehensive Guide

Finding the right bra size is crucial for comfort, support, and the overall appearance of your clothing. Many women wear the wrong bra size, leading to discomfort, poor posture, and even health issues. Our Bra Measurement Calculator helps you determine your estimated bra size using a simple, widely accepted method.

Why Accurate Bra Sizing Matters

  • Comfort: A well-fitting bra prevents digging straps, gaping cups, and a band that rides up.
  • Support: Proper support reduces back and shoulder pain, especially for those with larger busts.
  • Appearance: The right bra enhances your silhouette, making clothes fit better and look more flattering.
  • Breast Health: Adequate support can help maintain breast shape and reduce discomfort during physical activity.

How to Measure Your Bra Size at Home

You'll need a soft measuring tape and ideally, a non-padded bra that fits well (or no bra at all). Follow these two steps:

Step 1: Measure Your Underbust (Band Size)

  1. Stand upright, exhale, and wrap the measuring tape snugly around your rib cage directly under your bust.
  2. Ensure the tape is level all the way around your back.
  3. Read the measurement in inches. This is your Underbust Measurement.
  4. Calculator Logic: Our calculator takes this measurement. If it's an even number, that's your band size. If it's an odd number, it rounds up to the next even number (e.g., 31 inches becomes a 32 band).
  5. Example: If your underbust measurement is 30 inches, your estimated band size is 30. If it's 31 inches, your estimated band size is 32.

Step 2: Measure Your Fullest Bust (Cup Size)

  1. Wrap the measuring tape around the fullest part of your bust, usually across your nipples.
  2. Make sure the tape is not too tight and not too loose, and that it's level across your back.
  3. Read the measurement in inches. This is your Fullest Bust Measurement.
  4. Calculator Logic: The difference between your Fullest Bust Measurement and your Underbust Measurement determines your cup size.
  5. Example: If your fullest bust is 35 inches and your underbust is 30 inches, the difference is 5 inches.

Understanding Your Bra Size Result

Your bra size is expressed as a number (the band size) followed by a letter (the cup size), for example, 34C.

Band Size Explained

The band size (e.g., 30, 32, 34) provides the majority of the support for your breasts. It should fit snugly around your rib cage without digging in or riding up your back. A good test is to see if you can fit two fingers comfortably under the band at your back.

Cup Size Explained

The cup size (e.g., A, B, C, D) indicates the volume of your breasts relative to your band size. Each inch of difference between your fullest bust and underbust measurement typically corresponds to one cup size:

  • Less than 1 inch difference: AA
  • 1 inch difference: A cup
  • 2 inches difference: B cup
  • 3 inches difference: C cup
  • 4 inches difference: D cup
  • 5 inches difference: DD (or E) cup
  • 6 inches difference: DDD (or F) cup
  • And so on…

The calculator uses these differences to provide your estimated cup letter.

Tips for a Perfect Fit

  • Try it on: Always try on bras before purchasing. Sizes can vary significantly between brands.
  • Scoop and Swoop: When trying on a bra, lean forward, scoop all your breast tissue into the cups, and then stand upright.
  • Check the Band: The band should be horizontal across your back, not riding up. It should be snug enough that only two fingers can fit underneath.
  • Check the Cups: Cups should fully encapsulate your breast tissue without gaping or spilling over at the top, sides, or bottom.
  • Check the Straps: Straps should provide minimal support (about 10-20% of the total support); the band does most of the work. They shouldn't dig into your shoulders.
  • Center Gore: The center panel between the cups (gore) should lie flat against your sternum.

Disclaimer

This calculator provides an estimated bra size based on common measurement methods. Individual body shapes, breast density, and brand-specific sizing can influence the final fit. We recommend using this as a starting point and always trying on bras to find your most comfortable and supportive fit.

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