VH to PX Converter

Convert viewport height units (vh) to exact pixel values for your current screen. This is useful when you analyse full-screen sections, fixed headers or vertically centered blocks and want to know their real height in pixels at specific viewport sizes.

vh
px
Popular presets

Enter a value in vh or px and the converter updates automatically. It works in both directions, so you can edit either field and get an accurate conversion based on the current viewport height.

The calculation uses the browser's viewport height at the moment of conversion. Since 1vh equals 1 percent of the viewport height, the result changes if the user resizes the window or rotates their device.

VH to PX Formula

px = (vh / 100) * viewport-height

To convert viewport height units (vh) to pixels (px), divide the vh value by 100 and multiply by the height of the viewport.

This method is useful for creating vertical layouts that scale with the user's screen size. Since vh depends on the actual height of the device, elements adapt naturally across different resolutions and orientations.

VH to PX Conversion Table (Viewport height: 900px)
VHPixels (px)
0.44vh 4px
0.89vh8px
1.33vh12px
1.78vh16px
2.22vh20px
2.67vh24px
3.56vh32px
4.44vh40px
5.33vh48px
7.11vh64px

Why Use VH Instead of PX?

VH units are often used for full-screen sections and vertical spacing, but during debugging you frequently need to see the resulting pixel heights. Converting vh to px shows how tall blocks become on different screens and helps you keep layouts balanced.

When users rotate their device or resize the window, vh-based elements grow or shrink automatically. Checking their pixel height at key breakpoints makes it easier to avoid cropped content, oversized hero sections or empty vertical gaps.

  • Adaptive vertical layout: elements scale with the viewport height instead of staying fixed.
  • Better responsiveness: ideal for full-screen sections, hero blocks, and vertically centered content.
  • Consistent appearance: behaves predictably across devices with different screen heights.
  • Reduced media queries: fewer manual adjustments for different resolutions.

Best Practices for Using VH

Using <code>vh</code> units helps create layouts that adapt to the user's actual screen height. Below are the most reliable best practices for using vh effectively in modern responsive design.

  • Use vh for full-height sections: hero blocks, splash screens, and intro sections work best when sized relative to the viewport height.
  • Use vh for vertical centering: combining vh with flexbox or grid helps maintain consistent alignment across devices.
  • Avoid relying on px for large vertical spacing: pixel values don't scale with screen height and may look cramped or oversized on different devices.
  • Don't use vh for text sizes: viewport-based typography can cause readability issues on very tall or very short screens.
  • Be careful with 100vh on mobile: mobile browsers have dynamic UI bars, so 100vh may exceed the visible area. Prefer <code>100svh</code>, <code>100lvh</code> or <code>100dvh</code> when supported.
  • Combine vh with media queries when needed: some layouts require minimum or maximum heights to avoid extreme scaling.
  • Test in landscape and portrait modes: viewport height changes drastically when rotating a device, so ensure the layout remains balanced.

Following these practices keeps your VH-based layouts predictable, responsive and visually stable across all screen sizes and device orientations.

How VH Works in CSS

The vh unit is based on the height of the browser's viewport. One vh equals 1% of the visible viewport height. This makes vh ideal for creating sections that scale automatically with the user's screen size.

For example, if the viewport height is 900px, then:

1vh = 9px

When you define layout dimensions using <code>vh</code>, the browser recalculates the pixel value dynamically whenever the viewport size changes — such as when rotating a mobile device or resizing a window. This allows for responsive vertical spacing without fixed pixel values.

  • Viewport–based: all vh values reference the current height of the browser window, not fonts or parent elements.
  • Dynamic recalculation: vh updates immediately when the user resizes the window or changes orientation.
  • Independent of content: unlike percentages, vh does not rely on parent element dimensions — only the screen height.
  • Useful for full-screen sections: hero blocks, splash screens and intro layouts scale naturally with the viewport.

In short, vh gives you direct control over vertical scaling, making it one of the most powerful units for responsive layouts, especially on modern devices with widely varying screen sizes.

How To Use VH

Using vh units is straightforward once you understand how they behave. Each vh represents 1% of the viewport height, making it ideal for building layouts that scale with the user's screen. VH is commonly used for hero sections, fullscreen blocks, responsive vertical spacing and fluid layouts.

1. Understand the viewport height reference

One vh equals 1% of the browser window's height. For example, if the viewport is 900px tall:

1vh = 9px

This reference updates automatically as the user resizes the window or rotates their device.

2. Use vh for full-height sections

.hero {
  height: 100vh;
}

Full-height sections scale automatically with the viewport, making them ideal for hero blocks and splash screens.

3. Use vh for vertical spacing

section {
  padding: 10vh 0;
}

Vertical spacing defined in vh keeps your layout proportional across different screen heights.

4. Use px for fixed elements

Borders, small icons or precise UI details should stay in px:

button {
  border: 1px solid #ccc;
}

5. Test in different orientations

Rotate your device or resize the browser window to ensure that vh-based layouts remain balanced in both portrait and landscape modes.

By combining vh units with thoughtful design and occasional pixel values, you can build layouts that adapt smoothly to any screen height while maintaining visual consistency.

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