50 px converts to approximately 3.125 rem on mobile devices.
This conversion is based on the standard root font size of 16 pixels used in most mobile browsers. By dividing the pixel value by 16, you get the equivalent rem value, which scales better with user settings and device resolutions.
Conversion Tool
Result in mobile:
Conversion Formula
The formula for converting pixels (px) to mobile rem units is:
rem = px / 16
This works because on mobiles, the default root font size is 16px, so 1 rem equals 16 pixels. Dividing the pixel value by 16 gives you the relative font size that’s scalable and adapts to user preferences and screen sizes.
Example calculation for 50 px:
- Start with 50 pixels.
- Divide 50 by 16 (the base font size): 50 ÷ 16 = 3.125
- So, 50 px = 3.125 rem on mobile.
Conversion Example
- Convert 32 px to mobile:
- Divide 32 by 16: 32 ÷ 16 = 2
- Result: 2 rem
- Convert 80 px to mobile:
- Divide 80 by 16: 80 ÷ 16 = 5
- Result: 5 rem
- Convert 24 px to mobile:
- 24 ÷ 16 = 1.5
- Result: 1.5 rem
- Convert 100 px to mobile:
- 100 ÷ 16 = 6.25
- Result: 6.25 rem
Conversion Chart
| Pixels (px) | Mobile rem |
|---|---|
| 25.0 | 1.5625 |
| 30.0 | 1.8750 |
| 35.0 | 2.1875 |
| 40.0 | 2.5000 |
| 45.0 | 2.8125 |
| 50.0 | 3.1250 |
| 55.0 | 3.4375 |
| 60.0 | 3.7500 |
| 65.0 | 4.0625 |
| 70.0 | 4.3750 |
| 75.0 | 4.6875 |
This chart shows pixel values from 25 to 75 converted into rem units for mobile screens. You can look up any pixel value in the left column and find its corresponding rem size in the right column for responsive design use.
Related Conversion Questions
- How do I convert 50 px to rem for mobile design?
- What is the rem value of 50 pixels on a smartphone?
- Why does 50 px equal 3.125 rem on mobile?
- Is 50 px the same size on desktop and mobile?
- How to calculate mobile font size from 50 px?
- What formula to use for converting 50 px to mobile rem?
- Does 50 px scale differently on various mobile devices?
Conversion Definitions
px (Pixel): A pixel is the smallest unit of a digital image or display, representing a single point in a raster graphics grid. It defines the resolution and size on screens, typically fixed in absolute units but can appear differently depending on screen density and scaling.
mobile (in conversion context): Refers to the unit rem (root em) used in mobile device styling, which is relative to the root font size set in browsers, often 16 pixels. Using rem units allows designs to scale proportionally across devices, adapting to user settings and screen sizes.
Conversion FAQs
Why use rem instead of px for mobile design?
Using rem units allows the layout and fonts to scale consistently with user preferences and device settings. Pixels are absolute, which can cause elements to appear too small or large on different screens. Rem units provide flexibility for accessibility and responsive design.
Does the 16 px root size change on different mobile devices?
Most mobile browsers set the root font size at 16 px by default, but users can change it in their settings. Some browsers or frameworks might adjust this, which affects rem calculations. It’s good practice to test your design on multiple devices to ensure consistency.
How precise is the px to rem conversion?
The conversion is mathematically exact based on the root font size. However, visual rendering may differ slightly due to screen pixel density, zoom levels, or browser rounding. Using rem ensures relative scaling but might not match pixel-perfect designs exactly.
Can I use other base values besides 16 px for conversion?
Yes, if your root font size is set differently in CSS, you need to divide by that value instead. For example, if the base font is 10 px, then rem = px / 10. The 16 px base is just the common default in many browsers.
What happens if I mix px and rem units in a mobile layout?
Mixing units can cause inconsistent scaling, where some elements respond to user zoom and font size changes, while others stay fixed. It’s better to stick to rem or relative units for scalable and accessible mobile designs.
