Pixel & Aspect Ratio Tool
アスペクト比（縦横比）計算ツール
動画や画像に最適な縦横のピクセルサイズを瞬時に割り出します。
:
px
px
Visual Scale Preview
1920 × 1080 (16:9)
16:9
Social Media Aspect Ratio & Dimension Cheat Sheet (2026)
Recommended pixel resolutions for maximum sharpness across Instagram, TikTok, YouTube, and X.
| Platform & Format | Ratio | Resolution (Pixels) | Purpose & Note |
|---|---|---|---|
| YouTube Video | 16:9 | 1920 × 1080 (1080p) | Standard HD / 4K landscape |
| TikTok / Reels / Shorts | 9:16 | 1080 × 1920 | Full screen vertical video |
| Instagram Portrait Feed | 4:5 | 1080 × 1350 | Maximum screen real estate |
| Instagram Square | 1:1 | 1080 × 1080 | Classic grid photo |
| Twitter / X In-Stream | 16:9 | 1200 × 675 | Landscape timeline media |
| Facebook Shared Image | 1.91:1 | 1200 × 630 | Link previews & timeline |
| LinkedIn Header | 4:1 | 1584 × 396 | Profile background banner |
100% Free
No subscription required
Lossless Speed
Real-time client execution
100% Private
0 KB uploaded to server
Universal
Works on iOS, Android & PC
How to use アスペクト比（縦横比）計算ツール
Complete the task in a few clear steps without unnecessary setup.
1
1. 比率を選択
16:9、4:3、9:16などを選びます。
2
2. 幅または高さを入力
ピクセル数を入力すると、もう一方が自動計算されます。
3
3. コピーして活用
計算結果を動画編集ソフト等に入力します。
Frequently Asked Questions
Everything you need to know about アスペクト比（縦横比）計算ツール.
縦型動画は 9:16（1080×1920ピクセル）が標準です。
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