24 pt is equal to 1.5 rem.
The conversion from points (pt) to rem units involves first converting points to pixels, since 1 pt equals 1.3333 pixels. Then, pixels are converted to rem by dividing by the root font size, which is generally 16 pixels. So, 24 pt × 1.3333 px/pt ÷ 16 px/rem = 1.5 rem.
Conversion Tool
Result in rem:
Conversion Formula
The formula to convert points (pt) to rem units uses the relationship between points and pixels, and pixels to rem. One point equals 1.3333 pixels, so first multiply points by 1.3333 to get pixels. Then, divide the pixel value by the root font size in pixels (commonly 16) to get rem units.
Formula:
rem = (pt × 1.3333) ÷ 16
This works because CSS rem units are relative to the root font size. Since 1 rem equals 16 pixels by default, converting pixels to rem requires dividing by 16.
Example calculation for 24 pt:
24 pt × 1.3333 = 31.9992 px
31.9992 px ÷ 16 px/rem = 1.5 rem
Conversion Example
-
Convert 12 pt to rem:
- Multiply 12 pt by 1.3333 = 15.9996 px
- Divide 15.9996 px by 16 = 1 rem
- Result: 12 pt = 1 rem
-
Convert 18 pt to rem:
- 18 pt × 1.3333 = 23.9994 px
- 23.9994 px ÷ 16 = 1.5 rem
- Result: 18 pt = 1.5 rem
-
Convert 36 pt to rem:
- 36 pt × 1.3333 = 47.9988 px
- 47.9988 px ÷ 16 = 3 rem
- Result: 36 pt = 3 rem
-
Convert 9 pt to rem:
- 9 pt × 1.3333 = 11.9997 px
- 11.9997 px ÷ 16 = 0.75 rem
- Result: 9 pt = 0.75 rem
Conversion Chart
| pt | rem |
|---|---|
| -1.0 | -0.0833 |
| 0.0 | 0.0000 |
| 1.0 | 0.0833 |
| 5.0 | 0.4167 |
| 10.0 | 0.8333 |
| 15.0 | 1.2500 |
| 20.0 | 1.6667 |
| 24.0 | 2.0000 |
| 30.0 | 2.5000 |
| 35.0 | 2.9167 |
| 40.0 | 3.3333 |
| 45.0 | 3.7500 |
| 49.0 | 4.0833 |
This chart shows pt values in left column and the equivalent rem values in right column. To find rem for any pt, locate the pt value then read across to rem. Negative pt values result in negative rem, which could be invalid in styling but shown here for completeness.
Related Conversion Questions
- How many rem is 24 pt in CSS?
- What is the rem equivalent of 24 points font size?
- How to convert 24 pt text size to rem units for web design?
- Is 24 pt bigger or smaller than 1.5 rem?
- Why does 24 pt equal 1.5 rem in CSS?
- How do I change 24 pt to rem in responsive design?
- Can 24 pt be written as rem for consistent scaling?
Conversion Definitions
pt (point): A unit of measurement used in typography and graphic design, where 1 point equals 1/72 of an inch. Points are used to specify font sizes, line heights, and spacing. In digital media, points are often converted to pixels for screen display, with 1 pt equaling about 1.3333 pixels.
rem (root em): A scalable unit in CSS that represents the font size relative to the root element’s font size, usually the <html> element. One rem equals the computed font size of the root, commonly 16 pixels by default, allowing consistent and scalable sizing across a webpage.
Conversion FAQs
Why do we multiply points by 1.3333 when converting to rem?
Because points are defined as 1/72 inch, and most screens use 96 pixels per inch, 1 point equals 96/72 = 1.3333 pixels. To convert points to rem, first convert points to pixels by multiplying by 1.3333, then divide by the root font size in pixels to get rem units.
Can the root font size 16px change affect pt to rem conversion?
Yes, if the root font size changes, the rem value for a given point size changes too. For example, if the root font size is 20px instead of 16px, then 24 pt converts to a smaller rem value because rem divides pixels by root font size. Always check the root font size for accurate conversions.
Is it better to use pt or rem for web typography?
Rem units are preferred for web typography because they scale relative to the root font size, enabling responsive designs and accessibility. Points are fixed physical units and don’t adapt well to different screen sizes and user settings, so rem provides more flexibility and consistency.
Do negative pt values have any practical use in rem conversion?
Negative pt values are unusual and generally invalid in typography for font sizes, so their conversion to rem may produce negative values but not useful in styling. It’s best to use positive pt values when converting to rem for meaningful font sizing.
How accurate is the 1.3333 factor in point to pixel conversion?
The 1.3333 factor comes from standard screen resolution assumptions (96 dpi). However, actual device pixel densities vary, so the conversion is approximate. For most web development, this approximation is sufficient, but high-density screens or print media might require different handling.
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