What is My Bra Size Calculator

What's My Bra Size Calculator

Enter your measurements below to find your estimated bra size. For best results, measure while wearing a non-padded bra or no bra at all.

function calculateBraSize() { var underBustInput = document.getElementById("underBustMeasurement").value; var bustInput = document.getElementById("bustMeasurement").value; var systemInches = document.getElementById("systemInches").checked; var resultDiv = document.getElementById("braSizeResult"); resultDiv.style.display = 'none'; // Hide previous result if (underBustInput === "" || bustInput === "") { resultDiv.style.backgroundColor = '#f8d7da'; resultDiv.style.borderColor = '#f5c6cb'; resultDiv.style.color = '#dc3545'; resultDiv.innerHTML = "Please enter both measurements."; resultDiv.style.display = 'block'; return; } var underBust = parseFloat(underBustInput); var bust = parseFloat(bustInput); if (isNaN(underBust) || isNaN(bust) || underBust <= 0 || bust <= 0) { resultDiv.style.backgroundColor = '#f8d7da'; resultDiv.style.borderColor = '#f5c6cb'; resultDiv.style.color = '#dc3545'; resultDiv.innerHTML = "Please enter valid positive numbers for measurements."; resultDiv.style.display = 'block'; return; } var underBustInches; var bustInches; if (!systemInches) { // If input is in CM, convert to inches underBustInches = underBust / 2.54; bustInches = bust / 2.54; } else { underBustInches = underBust; bustInches = bust; } if (bustInches <= underBustInches) { resultDiv.style.backgroundColor = '#f8d7da'; resultDiv.style.borderColor = '#f5c6cb'; resultDiv.style.color = '#dc3545'; resultDiv.innerHTML = "Bust measurement must be greater than underbust measurement."; resultDiv.style.display = 'block'; return; } // Calculate Band Size (Modern Method: Round up to nearest even number) var bandSize = Math.ceil(underBustInches / 2) * 2; // Ensure band size is at least 28 (common smallest band size) if (bandSize < 28) { bandSize = 28; } // Calculate Cup Size var cupDifference = bustInches – bandSize; var cupSize = ""; 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) { cupSize = "J"; } else { cupSize = "K or larger (consult a specialist)"; } resultDiv.style.backgroundColor = '#e9f7ef'; resultDiv.style.borderColor = '#d4edda'; resultDiv.style.color = '#28a745'; resultDiv.innerHTML = "Your estimated bra size is: " + bandSize + cupSize + ""; resultDiv.style.display = 'block'; }

Understanding Your Bra Size

Finding the right bra size is crucial for comfort, support, and the overall look of your clothing. Many women wear the wrong bra size, leading to discomfort, poor posture, and an unflattering silhouette. This calculator provides an estimate based on standard measurement methods.

How to Measure Yourself Correctly

1. Wear the Right Attire: For the most accurate measurements, wear a non-padded bra or no bra at all. Stand in front of a mirror to ensure the tape measure is level.
2. Underbust Measurement (Band Size): Wrap a soft tape measure snugly around your rib cage, directly under your bust. Make sure the tape is parallel to the floor and exhale completely to get the smallest measurement. This measurement helps determine your band size.
3. Bust Measurement (Cup Size): Wrap the tape measure loosely around the fullest part of your bust (usually across the nipples). Ensure the tape is level and not too tight or too loose. This measurement, in combination with your band size, determines your cup size.

What Do the Numbers and Letters Mean?

Your bra size consists of two parts: a number and a letter.

• The Number (Band Size): This refers to the measurement around your rib cage. It provides the primary support for your breasts. A well-fitting band should be snug and level across your back, not riding up.
• The Letter (Cup Size): This indicates the volume of your breasts. It's determined by the difference between your bust measurement and your band measurement. Each inch of difference typically corresponds to a cup size (e.g., 1 inch = A cup, 2 inches = B cup, etc.).

Common Bra Sizing Mistakes

• Band Too Loose: If your band rides up your back, it's too big and not providing proper support.
• Cups Gaping or Overflowing: Gaping cups mean the cup size is too large; overflowing (spillage) means it's too small.
• Straps Digging In: Bra straps should only provide about 10% of the support. If they're digging into your shoulders, your band is likely too loose.
• Underwire Digging In: The underwire should lie flat against your rib cage, not on breast tissue, and should not dig into your armpit.

Important Considerations

Bra sizing can vary slightly between brands and styles. This calculator provides a starting point. It's always recommended to try on bras to ensure the perfect fit. Look for a bra where the band is snug, the cups encapsulate your breasts without gaping or spilling, and the center gore (the part between the cups) lies flat against your sternum.

Remember, your bra size can change due to weight fluctuations, pregnancy, hormonal changes, and age. Re-measure yourself periodically to ensure you're always wearing the best fit.