78 px equals 4.875 rem.
This result comes from dividing the pixel value by the base font size, which is 16 pixels by default in most browsers. So, 78 pixels divided by 16 gives you the rem value.
Conversion Tool
Result in rem:
Conversion Formula
The formula to convert pixels (px) to rem units is:
rem = px ÷ base_font_size
Because rems are relative to the root element’s font size, which is 16 pixels by default, you take the pixel value and divide by 16 to get the rem value.
For example, converting 78 px to rem:
- Start with the pixel value: 78 px
- Divide by the base font size: 78 ÷ 16
- Result is 4.875 rem
Conversion Example
- Example: Convert 32 px to rem
- Take 32 pixels
- Divide by 16 (base font size)
- 32 ÷ 16 = 2 rem
- Example: Convert 45 px to rem
- Start with 45 pixels
- Divide 45 by 16
- 45 ÷ 16 = 2.8125 rem
- Example: Convert 100 px to rem
- Begin with 100 pixels
- Divide 100 by 16
- 100 ÷ 16 = 6.25 rem
- Example: Convert 58 px to rem
- Take 58 pixels
- Divide 58 by 16
- 58 ÷ 16 = 3.625 rem
Conversion Chart
This table shows pixel values from 53.0 to 103.0 and their rem equivalents based on dividing by 16. You can use this chart to quickly find the rem value without doing math each time.
| Pixels (px) | Rem |
|---|---|
| 53.0 | 3.3125 |
| 58.0 | 3.6250 |
| 63.0 | 3.9375 |
| 68.0 | 4.2500 |
| 73.0 | 4.5625 |
| 78.0 | 4.8750 |
| 83.0 | 5.1875 |
| 88.0 | 5.5000 |
| 93.0 | 5.8125 |
| 98.0 | 6.1250 |
| 103.0 | 6.4375 |
Related Conversion Questions
- How do I convert 78 pixels to rem units for responsive design?
- What is the rem value of 78px if the base font size changes?
- Can I use 78 px as rem directly in CSS?
- Why does 78 px equal 4.875 rem in most browsers?
- How to convert 78 px to rem in a different root font size?
- Is 78 px bigger or smaller than 4.875 rem?
- What happens to 78 px to rem conversion if the base font size is 14px?
Conversion Definitions
px (pixel): A pixel is a single point in a digital image, the smallest unit of measurement on a screen. Pixels are absolute units, meaning their size is fixed and depends on the screen’s resolution. Pixels are frequently used in web design to specify exact sizes for elements.
rem (root em): Rem is a relative unit in CSS that scales according to the root element’s font size, which is mostly 16 pixels by default. Unlike px, rem units adapt when the root font size changes, providing scalability and better accessibility for different devices or user settings.
Conversion FAQs
What if the base font size isn’t 16 pixels?
If the root font size changes, the rem value for 78 px will change accordingly. For example, if the base font size is 20 px, then 78 px equals 78 ÷ 20 = 3.9 rem. Always divide the pixel value by the current root font size to get the correct rem value.
Why use rem instead of px for web design?
Rem units offer flexibility by scaling with the root font size, helping designs adjust better to user preferences and different screen sizes. Pixels remain fixed, so rem helps in creating responsive layouts that work well across devices.
Can rem values be fractional?
Yes, rem values often include fractions to provide precise sizing. For example, 4.875 rem is a fractional value resulting from dividing 78 by 16. Browsers handle fractional rem values well and render sizes accurately.
How does changing the browser default font size affect rem?
When a user adjusts their browser’s default font size, rem units will scale accordingly. This means elements sized in rem will become bigger or smaller, improving accessibility for users who need larger text.
Is rem supported in all modern browsers?
Most modern browsers support rem units fully. Older browsers may not support rem, but this is rare now. Using rem ensures better scalability and easier management of font sizes in modern web development.