颜色和设计
宽高比计算器
免费的宽高比计算器。根据宽度和高度计算比率，然后调整任一轴以保持相同比率。适用于图像、视频、设计。
Runs in your browser
Aspect ratio calculator
Resize to fit a new width
Ratio
16:9
Decimal
1.7778
编辑注
Understanding · Width over height. Everywhere.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›How do I calculate aspect ratio?
Divide width by height, then simplify the resulting fraction. We do it for you and show common-name matches (16:9, 4:3, etc.).
›Can I resize keeping the ratio?
Yes — enter a new width and the height auto-adjusts (or vice versa) to maintain the original ratio.
›What's the most common video ratio?
16:9 for landscape (HD/4K video, YouTube), 9:16 for vertical (TikTok, Instagram Reels), 1:1 for square (Instagram feed).
›Is the calculator free?
Yes — fully free, no signup.
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