PX to EM Converter & Conversion Tables [Online Calculator]

Q: How do I convert PX to EM in CSS?

To convert PX to EM, divide the pixel value by the parent element's font size (usually 16px ). Example: 16px ÷ 16 = 1em

Q: What is the default EM base size in CSS?

Most browsers use a default font size of 16px , meaning 1em = 16px unless otherwise defined.

Easily convert pixels (PX) to EM with this free online CSS unit converter. Ideal for web designers, developers, and digital creators, this calculator ensures precise scaling for responsive web designs and typography control.

✅ Perfect for scaling typography, spacing, and layout designs in CSS.
✅ Designed to streamline your workflow for fluid and consistent web designs.

Start Converting Now →

PX to EM Conversion Calculator

PX to EM Converter

Enter your PX value below to instantly convert it to EM.

Pixel (PX) Value: EM Value:

Input Field → Enter Pixel (PX) Value
Convert Button → Instantly Calculate EM Value
Copy Button → One-click copy for easy use in CSS code
Reset Button → Clear your inputs with one click

Example Calculation:

16px = 1em

PX to EM Conversion Table

PX	EM
8px	0.5em
10px	0.625em
12px	0.75em
14px	0.875em
16px	1em
20px	1.25em
24px	1.5em
32px	2em
48px	3em
64px	4em

Use this table for common conversions in CSS for better typography scaling.

How to Use the PX to EM Converter

Step 1: Enter your pixel value in the input field.

Step 2: Click the “Convert” button to get the EM value instantly.

Step 3: Use the copy button to grab the calculated EM value for quick use in your CSS code.

Step 4: Reference the conversion table for standard values.

💡 Pro Tip: For accurate scaling, ensure your CSS base font size is set to 16px (default browser setting).

When to Use PX vs EM in CSS?

PX (Pixel)

✅ Best for fixed-size elements where precision is required.
✅ Ideal for borders, small icons, or design elements that shouldn’t scale.

EM

✅ Preferred for responsive web designs where elements scale relative to their parent element.
✅ Best used for typography, padding, and margin values in modular web designs.
✅ Effective for creating scalable components with dynamic sizing.

Which One Should You Use?

Use PX for fixed-size elements.
Use EM for scalable typography and layouts to improve responsiveness.

FAQs About PX to EM Conversion

How do I convert PX to EM in CSS?

To convert PX to EM, divide the pixel value by the parent element's font size (usually 16px).
Example: 16px ÷ 16 = 1em

What is the formula to convert PX to EM?

EM Value = PX Value ÷ Parent Font Size

Why should I use EM instead of PX in CSS?

EM offers better flexibility for modular designs and ensures elements scale relative to their parent, improving adaptability.

What is the default EM base size in CSS?

Most browsers use a default font size of 16px, meaning 1em = 16px unless otherwise defined.

Is EM still useful in modern CSS?

Yes! EM remains essential for flexible designs, particularly in nested layouts and modular designs.

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