Open a mobile hero block vw/vh example
Convert a 320×180 block from a 1440×900 design canvas to a 390×844 viewport.
Open exampleVW VH 视口单位换算查看
输入设计稿尺寸、元素像素和目标视口，查看 vw、vh、vmin、vmax 和实际像素回算，适合响应式宽高和移动端首屏检查。
设计稿宽高、元素像素和目标视口例如 1440 900 320 180 390 844
px
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输出 vw、vh、vmin、vmax 和目标视口回算像素，适合判断是否需要 clamp、max-width 或 rem 兜底。
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FAQ
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vw 和 vh 怎么换算？
1vw 等于视口宽度的 1%，1vh 等于视口高度的 1%。元素像素 ÷ 设计稿宽度 × 100 可得到设计稿口径的 vw。
什么时候不用 vw/vh？
文字字号、按钮高度和密集表单通常不应只靠视口单位，避免在极窄或极宽屏上失控；可以配合 clamp、rem 和 max-width 使用。
Which elements fit vw/vh sizing?
Hero sections, visual backgrounds, large containers, and viewport-relative modules fit best. Body text and buttons usually need rem or clamp safeguards.
Why calculate target viewport pixels?
The same vw/vh value maps to very different pixels across mobile and desktop, so back-calculation shows whether clamp or max-width is needed.
Related long-tail searches
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viewport unit calculatorvw vh calculatorpx to vw vh converterresponsive layout vw calculatormobile viewport height calculatorvmin vmax conversionVW VH 视口单位换算查看VW/VH