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Pixel & CSS Unit Converter

Convert pixels (px) to rem, em, pt, vw, vh, percentages, inches, centimeters, and millimeters quickly and accurately.

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PIXEL CONVERTERS

Convert Pixels and CSS Units With Ease

Pixel Converters provides simple online tools for converting between pixels and commonly used CSS, web design, and measurement units. Whether you are a web developer, designer, student, or working with digital layouts, our converters make unit calculations quick and easy.

Use the conversion tools below to convert between px, rem, em, pt, vw, vh, percentages, inches, centimeters, and millimeters. Each converter is designed to provide straightforward results without requiring an account or complicated setup.

WHY USE OUR TOOLS?

Simple Tools for Designers and Developers

Our conversion tools are designed to make everyday unit calculations easier when working with CSS, websites, digital designs, and measurements.

Quick Calculations

Convert values without manually working through formulas. Enter your value and get the result quickly.

Easy to Use

Our converters use simple interfaces that make it easy to select a unit and calculate the value you need.

Useful for CSS

Convert between common CSS units such as px, rem, em, vw, vh, and percentages for web development projects.

Free Online Tools

Use Pixel Converters online without creating an account or installing additional software.

LEARN ABOUT CSS UNITS

Understanding CSS Units

CSS provides several different units for defining sizes, spacing, typography, and responsive layouts. Choosing the appropriate unit can make a website easier to maintain and adapt to different screen sizes.

Pixels are fixed units commonly used when a precise dimension is needed. Relative units such as rem, em, vw, and vh can be useful when creating flexible and responsive layouts.

Understanding how these units relate to each other can help designers and developers make better decisions when working with CSS.

PX Pixel — a commonly used fixed CSS unit.
REM Relative to the root element's font size.
EM Relative to the font size of an element or its parent.
VW Relative to the width of the viewport.
VH Relative to the height of the viewport.
CONVERSION GUIDE

How to Convert PX to REM

PX to REM is one of the most common conversions used when working with CSS and responsive web design.

PX to REM Formula

To convert pixels to rem, divide the pixel value by the root font size. When the root font size is 16 pixels, the basic formula is:

REM = PX ÷ 16

For example, if you want to convert 32 pixels to rem using a 16px root font size:

32px ÷ 16 = 2rem

Keep in mind that the result can change when the root font size used by a website is different from 16 pixels.

Common PX to REM Values

Pixels REM
8px 0.5rem
12px 0.75rem
16px 1rem
20px 1.25rem
24px 1.5rem
32px 2rem
40px 2.5rem
48px 3rem
Use PX to REM Converter
CSS UNIT GUIDE

When Should You Use PX, REM, EM, VW or VH?

Different CSS units are useful in different situations. Understanding their behavior can help you build flexible and maintainable web layouts.

PX

Use pixels when you need a specific fixed dimension, such as certain borders, icons, or precise interface details.

REM

REM is useful for scalable typography, spacing, and layout values that should be based on the root font size.

EM

EM can be useful when dimensions need to scale based on the font size of the current element or its parent context.

VW

VW units are based on viewport width and can be useful for responsive layouts and fluid sizing.

VH

VH units are based on viewport height and are often used for sections or elements that need to respond to the height of the browser window.

FAQ

Frequently Asked Questions

Common questions about converting pixels to rem units.

What is a pixel (PX)?

A pixel, commonly written as px in CSS, is a unit used to define dimensions such as width, height, spacing, and font sizes in web interfaces.

What is REM in CSS?

REM is a relative CSS unit based on the font size of the root HTML element. It is commonly used for typography, spacing, and scalable layouts.

How many pixels are in 1 REM?

With the common browser default root font size of 16 pixels, 1rem equals 16px. However, the actual value depends on the root font size defined by the website.

What is the difference between PX and REM?

PX is generally treated as a fixed CSS unit, while REM is relative to the root element's font size. REM can therefore be useful when creating scalable and responsive designs.

What are VW and VH units?

VW represents a percentage of the viewport width, while VH represents a percentage of the viewport height. They are commonly used for responsive web layouts.

Can these converters be used for CSS?

Yes. Pixel Converters includes tools for converting between several units commonly used in CSS and web development, including px, rem, em, vw, vh, and percentage values.

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