What is PX to EM Converter?

The term “Em” basically refers to the width of the letter “M” in a given typeface. And Px (pixel) stands for “Picture Element.” The Pixels to Em Converter is a free online tool primarily used by designers and developers to convert pixel values into Em values.

Why Use Pixel to Em Converter?

There are many uses of this converter, some of them are as follows:

• It boosts the website’s responsiveness.
• Em value enhances the website accessibility.
• It helps to optimize CSS for scalability.
• This converter improves SEO and core web vitals.

How to Convert Pixel to Em?

Use this calculator by following the steps below:

Step 1: Enter the base value in the mentioned column.

Step 2: Then, write the px value that you want to convert.

Step 3: Press the convert button and get the result instantly.

Pixels to Em Formula

If you are confused and want to make sure that the calculator is giving you the correct value, then you can double-cross it with the following formula:

em=px/Base Font Size (The default font size is 16px)

For example, If the  base font size is 16px, then,

• 32px = 2em
• 24px = 1.5em
• 16px = 1em
• 8px =  0.5em

Pixel to Em Conversion Table

The table below shows some common px to em conversions for web design elements, such as font sizes, element width, and breakpoints. Moreover, these conversions are set based on a default base font size that is 16px, which is commonly used in web development & Cascading style sheet. But for more accurate results, you can use the above calculator.

PX	EM
4px	0.25em
8px	0.5em
12px	0.75em
16px	1em
20px	1.25em
24px	1.5em
32px	2em
40px	2.5em
48px	3em
64px	4em
80px	5em
96px	6em
112px	7em
128px	8em
160px	10em
176px	11em
192px	12em
208px	13em
224px	14em
240px	15em
256px	16em
288px	18em
320px	20em
384px	24em
480px	30em
512px	32em
640px	40em
768px	48em
960px	60em
1024px	64em
1280px	80em
1536px	96em
1920px	120em
2000px	125em

Difference Between Px and Em

Both Px and em are units of measurement. But they differ in size.

Pixels are absolute units that have a fixed value. Furthermore, their size can’t be changed on the screen unless by a user setting. Pixels show control and fixed dimensions.

On the other hand, em’s are relative units that are changeable. It drives its size parent element that shows the computed font size. Ems shows scalability and elasticity.

Want to do vice versa? Try em to px here.

Few Valuable Examples of PX

Below are few valuable examples of how px (pixels) work in CSS, covering different scenarios like fixed sizing, layout consistency, spacing, and responsiveness.

Example 1: Fixed Font Size (Does Not Scale)

Unlike em px values remain fixed and do not scale with the parent element.

HTML:

<section>
    <p>This text is in fixed pixel size.</p>
</section>

CSS:

section {
    font-size: 20px; /* Set font size */
}

p {
    font-size: 30px; /* Always 30px, no matter the parent */
}

Result:

• <p> will always be 30px, regardless of the <section> size.
• Unlike em, it does not inherit scaling.

✅ Use px when you want a fixed, unchanging size.

You can also try vh to px for view height conversions.

Example 2: Consistent Button Size (Does Not Change with Base Font)

When using px, the size of buttons remains constant across different devices.

HTML:

<button class="btn">Click Me</button>

CSS:

.btn {
    font-size: 18px; /* Fixed font size */
    padding: 10px 20px; /* Fixed padding */
    background: blue;
    color: white;
    border: none;
    cursor: pointer;
}

Why It’s Useful?

• The button remains the same size no matter the user’s settings.
• Best when you need uniform design consistency.