Samantha Nicole1.5 rem is equal to 24 pixels (px).
The conversion from rem to px depends on the root font size set in the browser or CSS, which is most commonly 16 pixels. So, multiplying 1.5 rem by 16px gives the equivalent pixel value.
Conversion Tool
Result in px:
Conversion Formula
To convert rem units into pixels, multiply the rem value by the root font size in pixels. Browsers set the root font size mostly at 16px unless changed by CSS. The formula looks like this:
pixels = rem × root font size (px)
This works because rem units are relative to the root element’s font size. For example, if the root font size is 16px:
- Given rem = 1.5
- pixels = 1.5 × 16
- pixels = 24px
So, 1.5 rem equals 24 pixels, based on a 16px base.
Conversion Example
- Convert 2 rem to px:
- Start with 2 rem.
- Multiply 2 by 16 (root font size).
- 2 × 16 = 32 px.
- Result is 32 pixels.
- Convert 0.75 rem to px:
- 0.75 rem × 16 = 12 px
- Multiply rem value by 16.
- Answer is 12 pixels.
- Convert 3.25 rem to px:
- 3.25 × 16 = 52 px
- Multiply the rem value by 16 pixels.
- Result is 52 pixels.
- Convert 1 rem to px:
- 1 × 16 = 16 px.
- Multiplying by root font size gives pixels.
- So, 16 pixels.
Conversion Chart
This chart shows the rem values from -23.5 up to 26.5 with their equivalent pixel values, assuming a root font size of 16px. To use the chart, find the rem value in the left column and read across to see the pixel equivalent.
| Rem | Pixels (px) |
|---|---|
| -23.5 | -376.0000 |
| -22.5 | -360.0000 |
| -21.5 | -344.0000 |
| -20.5 | -328.0000 |
| -19.5 | -312.0000 |
| -18.5 | -296.0000 |
| -17.5 | -280.0000 |
| -16.5 | -264.0000 |
| -15.5 | -248.0000 |
| -14.5 | -232.0000 |
| -13.5 | -216.0000 |
| -12.5 | -200.0000 |
| -11.5 | -184.0000 |
| -10.5 | -168.0000 |
| -9.5 | -152.0000 |
| -8.5 | -136.0000 |
| -7.5 | -120.0000 |
| -6.5 | -104.0000 |
| -5.5 | -88.0000 |
| -4.5 | -72.0000 |
| -3.5 | -56.0000 |
| -2.5 | -40.0000 |
| -1.5 | -24.0000 |
| -0.5 | -8.0000 |
| 0.5 | 8.0000 |
| 1.5 | 24.0000 |
| 2.5 | 40.0000 |
| 3.5 | 56.0000 |
| 4.5 | 72.0000 |
| 5.5 | 88.0000 |
| 6.5 | 104.0000 |
| 7.5 | 120.0000 |
| 8.5 | 136.0000 |
| 9.5 | 152.0000 |
| 10.5 | 168.0000 |
| 11.5 | 184.0000 |
| 12.5 | 200.0000 |
| 13.5 | 216.0000 |
| 14.5 | 232.0000 |
| 15.5 | 248.0000 |
| 16.5 | 264.0000 |
| 17.5 | 280.0000 |
| 18.5 | 296.0000 |
| 19.5 | 312.0000 |
| 20.5 | 328.0000 |
| 21.5 | 344.0000 |
| 22.5 | 360.0000 |
| 23.5 | 376.0000 |
| 24.5 | 392.0000 |
| 25.5 | 408.0000 |
| 26.5 | 424.0000 |
Related Conversion Questions
- How many pixels are in 1.5 rem if my root font size is 18px?
- Is 1.5 rem always equal to 24 pixels on all browsers?
- Why does 1.5 rem sometimes not match 24px on my website?
- How do I convert 1.5 rem to pixels in CSS with a different base font size?
- What happens to 1.5 rem in pixels if the root font size is changed to 20px?
- Can I use 1.5 rem as 24 pixels in responsive design?
- How to calculate pixels from 1.5 rem when the root font size is unknown?
Conversion Definitions
rem: Rem is a CSS length unit stands for “root em.” It measures size relative to the root element’s font size, usually the <html> element. Rem units enable scalable layouts that adjust when the root font size changes, making designs flexible across devices and user settings.
px: Px means pixels, which are fixed-size units in digital screens. A pixel is the smallest controllable element of a display. Unlike rem, px represents absolute dimensions, making it useful for precise control but less adaptive for responsive designs.
Conversion FAQs
Can the root font size be different than 16px and affect 1.5 rem to px conversion?
Yes, the root font size can be changed using CSS, like setting html { font-size: 18px; }. When this happens, 1.5 rem equals 1.5 × 18 = 27 pixels. So the conversion depends on the actual root size not being fixed to 16px.
What if the user changes browser default font size, does 1.5 rem to px change?
Changing browser default font size affects rem units because rem depends on root font size. If a user increases default size to 20px, 1.5 rem equals 30px. This allows websites to respect user preferences for better readability.
Why use rem instead of px if px gives an exact pixel value?
Rem offers flexibility and scalability. Px is exact but fixed, so layouts with px don’t adapt well to different screen sizes or user preferences. Rem scales with root font size, making it easier to maintain consistent proportions while adjusting sizes globally.
Can 1.5 rem result in fractional pixels?
Yes, 1.5 rem might equal fractional pixels like 24.5px if the root font size isn’t a whole number (e.g., 16.3px). Browsers handle fractional pixels by rounding or anti-aliasing, so it usually appears smooth on screen despite fractions.
How to find current root font size to accurately convert 1.5 rem?
You can inspect the root font size using browser developer tools by checking the computed styles of the <html> element. Knowing that number helps to convert rem to pixels accurately by multiplying 1.5 by that value.
