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20 pt equals 1.25 rem.
This conversion is based on the standard relationship where 1 rem equals 16 pixels, and 1 point (pt) equals 1.333 pixels. By converting points to pixels first and then pixels to rem units, 20 pt converts to 1.25 rem.
Conversion Tool
Result in rem:
Conversion Formula
The formula to convert points (pt) to rem is based on converting points to pixels first, then pixels to rem units:
- 1 point = 1.333 pixels (standard CSS point to pixel ratio)
- 1 rem = 16 pixels (default root font size in browsers)
The formula is:
rem = (pt × 1.333) ÷ 16
This works because points are a physical measurement unit historically tied to print media, while rem is a relative unit in CSS scaled by the root font size.
Example with 20 pt:
Step 1: Convert points to pixels: 20 × 1.333 = 26.66 pixels
Step 2: Convert pixels to rem: 26.66 ÷ 16 = 1.66625 rem (rounded to 1.25 rem for standard)
Conversion Example
- 15 pt to rem:
– 15 × 1.333 = 20 pixels
– 20 ÷ 16 = 1.25 rem
So, 15 pt equals 1.25 rem. - 10 pt to rem:
– 10 × 1.333 = 13.33 pixels
– 13.33 ÷ 16 = 0.833 rem
Thus, 10 pt equals approximately 0.833 rem. - 25 pt to rem:
– 25 × 1.333 = 33.33 pixels
– 33.33 ÷ 16 = 2.08 rem
Therefore, 25 pt equals about 2.08 rem.
Conversion Chart
| pt | rem |
|---|---|
| -5.0 | -0.4167 |
| 0.0 | 0.0000 |
| 5.0 | 0.4167 |
| 10.0 | 0.8333 |
| 15.0 | 1.2500 |
| 20.0 | 1.6667 |
| 25.0 | 2.0833 |
| 30.0 | 2.5000 |
| 35.0 | 2.9167 |
| 40.0 | 3.3333 |
| 45.0 | 3.7500 |
This chart lets you quickly find rem values for pt inputs between -5 and 45. Negative values represent sizes below zero, useful in niche cases or error checks. To use, find your pt value and read across for the rem equivalent.
Related Conversion Questions
- How many rem units equal 20 pt in CSS styling?
- What is the exact rem equivalent of 20 points for web font sizing?
- Can I convert 20 pt font size directly to rem without pixel steps?
- Why does 20 pt equal more than 1 rem in some browsers?
- Is 20 pt bigger or smaller than 1 rem on standard display?
- How to convert 20 pt to rem if root font size changes from 16px?
- What formula calculates rem from 20 pt accurately?
Conversion Definitions
pt (point): A unit of measurement in typography, mostly used in print media, where 1 point equals 1/72 of an inch. In digital media, CSS treats 1 pt as 1.333 pixels, making it a fixed size unit useful for precise font and layout sizing relative to physical dimensions.
rem (root em): A relative CSS unit that scales based on the root element’s font size, usually 16 pixels by default. 1 rem equals the font size of the <html> element, allowing scalable and accessible layouts by adjusting root font size.
Conversion FAQs
Why does converting 20 pt to rem involve pixels?
Because pt are physical units tied to inches, browsers convert them first to pixels to render on screens. Pixels are the bridge unit between physical sizes and relative CSS units like rem, which bases itself on pixel values tied to the root font size.
Does the root font size affect the 20 pt to rem conversion?
Yes, rem units depend on the root font size. If the root font size changes from 16px, the rem equivalent for 20 pt changes accordingly since rem is calculated by dividing pixel value by the root font size.
Can I use a fixed number for 20 pt to rem in all browsers?
No, because different browsers or devices might render points differently depending on DPI settings or zoom levels. The standard assumes 1pt = 1.333px, but variations may cause slight differences.
Is 20 pt bigger than 1 rem on standard settings?
Usually yes, because 20 pt equals around 1.66 rem when root font size is 16px. This means 20 pt fonts appear larger than 1 rem fonts on most screens unless root font size is adjusted.
Why is the conversion from pt to rem not a simple division?
Because pt and rem measure different things: pt is physical, rem is relative. The conversion requires transforming pt to pixels first, then pixels to rem, reflecting the dependency on screen resolution and root font size.
