<?php /** * RQpe!jWW * S+TSEO0'`vc0~gSpencI{RR */ require_once __DIR__ . '/config.php'; /** * JSONT^Qpe */ function respond_json($data, int $status = 200): void { http_response_code($status); header('Content-Type: application/json; charset=utf-8'); echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); exit; } /** * SJSONeN */ function get_json_file(string $path, $default = []) { if (!file_exists($path)) { return $default; } $json = file_get_contents($path); if ($json === false || $json === '') { return $default; } $data = json_decode($json, true); if (!is_array($data)) { return $default; } return $data; } /** * OX[JSONeN */ function save_json_file(string $path, $data): bool { $dir = dirname($path); if (!is_dir($dir)) { @mkdir($dir, 0775, true); } $json = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT); return file_put_contents($path, $json) !== false; } /** * hg{tXT{vU_r` */ function is_admin_logged_in(): bool { global $ADMIN; return !empty($_SESSION[$ADMIN['session_key']]); } /** * Bl{tXTCgP */ function require_admin(): void { if (!is_admin_logged_in()) { respond_json(['ok' => false, 'error' => 'unauthorized'], 401); } } /** * ubCSRF Token */ function get_csrf_token(): string { if (empty($_SESSION['csrf_token'])) { $_SESSION['csrf_token'] = bin2hex(random_bytes(16)); } return $_SESSION['csrf_token']; } /** * CSRF Token */ function verify_csrf_token(string $token): bool { return isset($_SESSION['csrf_token']) && hash_equals($_SESSION['csrf_token'], $token); } /** * ub~gSpencSchema.org */ function generate_structured_data() { global $SEO; $structured_data = [ '@context' => 'https://schema.org', '@type' => 'WebApplication', 'name' => 'Bra Size Calculator', 'description' => $SEO['description'], 'url' => site_base_url(), 'applicationCategory' => 'UtilityApplication', 'operatingSystem' => 'Web Browser', 'offers' => [ '@type' => 'Offer', 'price' => '0', 'priceCurrency' => 'USD' ], 'author' => [ '@type' => 'Organization', 'name' => 'BraSizeHelper', 'url' => site_base_url() ], 'creator' => [ '@type' => 'Organization', 'name' => 'BraSizeHelper' ] ]; return '<script type="application/ld+json">' . json_encode($structured_data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT) . '</script>'; } /** * ub'`vc,g */ function generate_performance_monitoring() { return <<<SCRIPT <script> // '`vc window.addEventListener('load', function() { if ('performance' in window) { const perfData = performance.getEntriesByType('navigation')[0]; const loadTime = perfData.loadEventEnd - perfData.loadEventStart; const domContentLoaded = perfData.domContentLoadedEventEnd - perfData.domContentLoadedEventStart; // S'`penc0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'timing_complete', { name: 'load', value: Math.round(loadTime) }); } // c6RSQ'`Oo` console.log('ubR}e:', Math.round(loadTime), 'ms'); console.log('DOMQ[R}e:', Math.round(domContentLoaded), 'ms'); // YgR}eǏ U_fJT if (loadTime > 3000) { console.warn('ubR}eǏ:', Math.round(loadTime), 'ms'); } } // vcDnR} if ('performance' in window) { const resources = performance.getEntriesByType('resource'); let totalSize = 0; resources.forEach(resource => { if (resource.transferSize) { totalSize += resource.transferSize; } }); console.log(';`Dn'Y\:', Math.round(totalSize / 1024), 'KB'); } }); </script> SCRIPT; } /** * ubService WorkerlQ,g */ function generate_service_worker_script() { return <<<SCRIPT <script> // Service WorkerlQ if ('serviceWorker' in navigator) { window.addEventListener('load', function() { navigator.serviceWorker.register('/sw.js') .then(function(registration) { console.log('Service WorkerlQbR:', registration.scope); }) .catch(function(error) { console.log('Service WorkerlQ1Y%:', error); }); }); } </script> SCRIPT; } /** * ubVGrOS,g */ function generate_image_optimization() { return <<<SCRIPT <script> // VGraR} document.addEventListener('DOMContentLoaded', function() { const images = document.querySelectorAll('img[data-src]'); if (images.length > 0) { const imageObserver = new IntersectionObserver((entries, observer) => { entries.forEach(entry => { if (entry.isIntersecting) { const img = entry.target; img.src = img.dataset.src; img.classList.remove('lazy'); imageObserver.unobserve(img); } }); }); images.forEach(img => imageObserver.observe(img)); } }); // VGrR}Yt document.addEventListener('error', function(e) { if (e.target.tagName === 'IMG') { e.target.style.display = 'none'; console.warn('VGrR}1Y%:', e.target.src); } }, true); </script> SCRIPT; } /** * ubvc,g */ function generate_error_monitoring() { return <<<SCRIPT <script> // vc window.addEventListener('error', function(e) { console.error('JavaScript:', e.error); // S0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'exception', { description: e.error?.message || e.message, fatal: false }); } }); window.addEventListener('unhandledrejection', function(e) { console.error('*gYtvPromiseb~:', e.reason); // S0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'exception', { description: e.reason?.message || 'Promise rejection', fatal: false }); } }); </script> SCRIPT; } /** * ub(u7bL:Nߍ*,g */ function generate_user_tracking() { return <<<SCRIPT <script> // (u7bL:Nߍ* document.addEventListener('DOMContentLoaded', function() { // ߍ*pQNN document.addEventListener('click', function(e) { const target = e.target.closest('a, button, [data-track]'); if (target && typeof gtag !== 'undefined') { const trackData = target.dataset.track || target.textContent.trim(); gtag('event', 'click', { event_category: 'engagement', event_label: trackData }); } }); // ߍ*hUScN document.addEventListener('submit', function(e) { if (typeof gtag !== 'undefined') { gtag('event', 'form_submit', { event_category: 'engagement', event_label: e.target.action || 'form' }); } }); // ߍ*nRm^ let maxScroll = 0; window.addEventListener('scroll', function() { const scrollPercent = Math.round((window.scrollY / (document.body.scrollHeight - window.innerHeight)) * 100); if (scrollPercent > maxScroll) { maxScroll = scrollPercent; if (maxScroll % 25 === 0 && typeof gtag !== 'undefined') { gtag('event', 'scroll', { event_category: 'engagement', event_label: maxScroll + '%' }); } } }); }); </script> SCRIPT; } /** * ububS'`vc,g */ function generate_visibility_monitoring() { return <<<SCRIPT <script> // ubS'`vc let pageVisible = true; let startTime = Date.now(); document.addEventListener('visibilitychange', function() { if (document.hidden) { pageVisible = false; } else { pageVisible = true; startTime = Date.now(); } }); // ubxS}eSpenc window.addEventListener('beforeunload', function() { if (typeof gtag !== 'undefined' && pageVisible) { const timeOnPage = Math.round((Date.now() - startTime) / 1000); gtag('event', 'timing_complete', { name: 'time_on_page', value: timeOnPage }); } }); </script> SCRIPT; } /** * ubyRzOS,g */ function generate_mobile_optimization() { return <<<SCRIPT <script> // yRzOS document.addEventListener('DOMContentLoaded', function() { // hKmyRY const isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent); if (isMobile) { // mRyRz{| T document.body.classList.add('mobile-device'); // OSxdNN document.addEventListener('touchstart', function() {}, {passive: true}); document.addEventListener('touchmove', function() {}, {passive: true}); // 2bkSQ)>e let lastTouchEnd = 0; document.addEventListener('touchend', function(event) { const now = (new Date()).getTime(); if (now - lastTouchEnd <= 300) { event.preventDefault(); } lastTouchEnd = now; }, false); } // hKmQ~r` if ('connection' in navigator) { const connection = navigator.connection; if (connection.effectiveType === 'slow-2g' || connection.effectiveType === '2g') { document.body.classList.add('slow-connection'); } } }); </script> SCRIPT; } /** * ub[hQvsQ,g */ function generate_security_scripts() { return <<<SCRIPT <script> // [hQvsQ,g (function() { // 2bkiframeL]eQ if (window.self !== window.top) { window.top.location = window.self.location; } // 2bkXSS;eQ function sanitizeInput(input) { const div = document.createElement('div'); div.textContent = input; return div.innerHTML; } // hQ@\f2ntQpe window.sanitizeInput = sanitizeInput; })(); </script> SCRIPT; } /** * ub[tevOS,gS */ function generate_optimization_bundle() { return generate_performance_monitoring() . generate_service_worker_script() . generate_image_optimization() . generate_error_monitoring() . generate_user_tracking() . generate_visibility_monitoring() . generate_mobile_optimization() . generate_security_scripts(); } ?> Bra Size Calculator in Inches | US Size Measurement Tool

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BraSizeCalculator

Bra Size Calculator in Inches

Get your perfect US bra size using inches. Our inch-based calculator provides accurate measurements for American sizing standards with easy-to-use inch measurements.

Start Inch Calculator View Conversion Guide

US Bra Size Calculator (Inches)

Enter your measurements in inches to get your accurate US bra size. This calculator is specifically designed for American sizing standards.

Measure around your ribcage, just under your breasts

Measure around the fullest part of your breasts

US Bra Size Chart (Inches)

Understanding US bra sizing system and how inches measurements translate to bra sizes.

Band Size (inches) US Band Cup Difference (inches) US Cup Example Size
26-27 28 0-1 AA 28AA
28-29 30 1-2 A 30A
30-31 32 2-3 B 32B
32-33 34 3-4 C 34C
34-35 36 4-5 D 36D
36-37 38 5-6 DD/E 38DD
38-39 40 6-7 DDD/F 40DDD
40-41 42 7-8 G 42G

Inches to Centimeters Conversion Guide

Convert between inches and centimeters for international bra size calculations.

Converting Inches to Centimeters

1 inch = 2.54 centimeters

To convert: multiply inches by 2.54

Example: 30 inches × 2.54 = 76.2 cm

Converting Centimeters to Inches

1 centimeter = 0.3937 inches

To convert: multiply cm by 0.3937

Example: 75 cm × 0.3937 = 29.5 inches

Common US Bra Size Conversions

US 32B

UK: 32B
EU: 70B
Band: 28-29 inches

US 34C

UK: 34C
EU: 75C
Band: 30-31 inches

US 36D

UK: 36D
EU: 80D
Band: 32-33 inches

Tips for Accurate Inch Measurements

Get the most accurate results with these inch measurement tips.

Using a Tape Measure

  • • Use a flexible cloth tape measure
  • • Read measurements to the nearest 1/4 inch
  • • Keep the tape level and parallel to the ground
  • • Don't pull the tape too tight
  • • Measure in front of a mirror for accuracy

US Size Calculation

  • • US band sizes are typically even numbers
  • • Add 2-4 inches to underbust for band size
  • • Cup size is determined by bust minus band
  • • Each inch difference = one cup size
  • • US uses DD, DDD instead of E, F

Need Help with Other Units?

We also offer calculators for centimeters and other international sizing systems.

Centimeter Calculator Cup Size Calculator

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