PX to EM converter
This free online PX to EM Converter tool quickly converts pixels (px) to em units. Ideal for responsive web design.
How to Use a PX to EM Converter Tool
Using this tool is easy:
Enter your pixel value you want to convert.
Enter the base font size (default is 16px).
Click “Convert” to get the em value.
The tool handles all the math instantly — just plug in your numbers and go.
Why Use EM Instead of PX?
Using em units makes your website more:
Responsive – content scales depending on screen size
Accessible – users with visual impairments can zoom text easily
Flexible – better control over nested elements and layout hierarchy
Modern – aligns with current best practices in CSS
Designs based on px can break on different devices, while em adapts dynamically.
PX to EM Conversion Table
| Pixels (px) | EM (Base 16px) |
|---|---|
| 8px | 0.5em |
| 12px | 0.75em |
| 16px | 1em |
| 20px | 1.25em |
| 24px | 1.5em |
| 32px | 2em |
Example:
- If the base font size is 16px, then 48px = 3em, and if the base font size is 12px, then 12px = 1em.
That’s because 48 ÷ 16 = 3 and 12 ÷ 12 = 1
Who Needs This Tool?
Web Developers – For responsive CSS coding.
UI/UX Designers – To ensure designs adapt across devices.
Accessibility Specialists – To support user font-size preferences.
Frequently Asked Questions (FAQs)
1. What is the formula to convert PX to EM?
em = pixel value / base font size
2. What is the default base font size for em?
Most browsers use 16px as the default font size.
3. Is EM better than PX for responsive design?
Yes, EM adjusts based on the user’s font preferences and device settings, making your design more flexible and user-friendly.
4. Should I always use em instead of px?
Not always. Use px for fixed-size elements and em/rem for scalable typography and spacing.
5. Can I use this converter for REM too?
No, em is relative to the parent’s font size. and REM rem is relative to the root (<html>) font size.
6. Is it safe to use?
Yes, 100% safe to use because we don’t store or share any data.