CSS Tools

PX to VW Converter

Convert pixel values to vw based on a chosen viewport width (e.g., 1440px). Includes batch conversion, rounding, copy-ready output, and full CSS conversion.

Fast No tracking List + Full CSS

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Used in: vw = (px / viewportWidth) * 100

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Enter one value per line (numbers only). Decimals are fine.

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When to use vw

vw is useful for fluid sizing that scales with the viewport width — common for responsive typography, spacing, and layout-driven values.

  • Great for fluid scaling between breakpoints
  • Useful for component sizing tied to viewport
  • Works well with clamp() for safer fluid typography

Quick examples

Viewport = 1440px
    16px  →  1.1111vw
    24px  →  1.6667vw
    32px  →  2.2222vw

Formula: vw = (px / viewportWidth) * 100

FAQ

What viewport width should I use?
Use the width your design was built for (e.g., 1440px or 1366px). If you’re converting a CSS file from a Figma/PSD layout, match that layout’s base width.
Should I convert all px to vw?
Usually no. Borders (1px), hairlines, icons, and precise UI controls often should stay in px. For typography, prefer clamp() with vw for safer scaling.
Does this tool convert px inside URLs or strings?
No — it intentionally avoids converting px inside url(...) and inside quoted strings to prevent breaking assets and SVG data.
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