アスペクト比計算機

使い方

画像、動画、画面のアスペクト比を計算・変換。幅または高さを固定して比例スケール。

1. 1Enter the width and height of your original image or video.
2. 2The tool instantly calculates and displays the aspect ratio (e.g., 16:9, 4:3).
3. 3Enter a new width or height to find the corresponding dimension that preserves the ratio.
4. 4Use the common presets (1080p, 4K, Instagram, etc.) to jump to standard sizes.

主な機能

• Calculate aspect ratios from any width and height pair
• Solve for missing dimension while locking the aspect ratio
• Common presets for video (16:9, 4:3) and social media formats
• Instant results with no page reload required

よくある質問

詳しく読む

• CSS Units Complete Guide — px, rem, em, vh, vw and More