EMからPXへの変換とは？ <strong>EM</strong>から<strong>PX</strong>への変換はWeb開発でよくあるタスクです。Convert EM units to pixel values based on parent element font size. 変換の仕組み EMからピクセルへの変換は、EM値に親要素のフォントサイズ（通常16px）を掛けます。例：1.5em × 16 = 24px。 Common EM to PX Conversions 0.75em = 12px — small/caption text 0.875em = 14px — compact body text 1em = 16px — parent font size 1.25em = 20px — slightly larger text 1.5em = 24px — subheadings 2em = 32px — headings Why Use This Converter? Instant results — paste a value and get the converted output immediately. Copy-ready CSS — one-click copy with properly formatted syntax. Shareable URLs — pre-fill values via URL for easy team sharing. No installation — works in any browser, on any device.