Conversion Form

PX
VH

About the Unit

Pixel (px): A pixel is the smallest visible measurement unit on a digital screen, commonly used to describe the resolution and dimensions of graphical elements and text. In a CSS context, the pixel is an absolute unit, but its perception can vary depending on the device's pixel density (such as on Retina displays). Although it is a fixed unit, the pixel value in CSS is standardized to ensure consistency across devices with different resolutions. For example, an element with 100px width will always render with 100 pixels of width on the screen, but on devices with higher pixel density, the content display may appear sharper. The px unit is widely used in graphical interface design, typography, and other visual properties, being the predominant choice in many web design approaches.

Pro Tip: pxvh

1vh = 1% of the viewport height. Use vh for full-height sections.

Quick Reference: Unit Conversion by Tens

PXVH
10px0.925926vh
20px1.851852vh
30px2.777778vh
40px3.703704vh
50px4.62963vh
60px5.555556vh
70px6.481481vh
80px7.407407vh
90px8.333333vh
100px9.259259vh
110px10.185185vh
120px11.111111vh
130px12.037037vh
140px12.962963vh
150px13.888889vh
160px14.814815vh
170px15.740741vh
180px16.666667vh
190px17.592593vh
200px18.518519vh
210px19.444444vh
220px20.37037vh
230px21.296296vh
240px22.222222vh
250px23.148148vh

Live Unit Preview

See how different CSS units affect the size of the box below:

10px

10rem

10em

10%

10vw

10vh

Common Mistake

1vh = 1% of the viewport height. Use vh for full-height sections.

Real Code Example

/* Mobile-first card with px → vh */
.card {
  padding: 0px;     /* undefinedvh */
  font-size: 1.5rem;
  width: min(90vw, 40ch);
}

Frequently Asked Questions About PX

When should I use px instead of px?

Use px for pixel-perfect control in fixed layouts.

How many px is 1px?

1px = 0.0625rem assuming a 16px base.

Is px affected by zoom?

Yes, it scales with browser zoom but remains fixed in layout.

Is px good for fonts?

Not recommended for fonts due to poor accessibility scaling.

Keyboard Shortcuts

  • Ctrl + C: Convert
  • Ctrl + I: Invert units
  • Esc: Reset values

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