Difference between px and pt:
- px means pixel, pixel is the most basic point of displaying data on the screen;
- pt is point, a common unit in the printing industry, equal to 1/72 of an inch.
The full name of px is pixel, which is a point. It is not a unit of length in nature. Who can tell how long a "point" is? It can be small or very large. If the dots are small, the picture is clear, we call it "high resolution", otherwise, it is "low resolution". Therefore, the size of the "point" will "change", also known as "relative length".
The full name of pt is point, but it is not called "point" in Chinese. Check Kingsoft PowerWord and you can see that the exact wording is a special printing unit "pound", the size of which is 1/72 of an inch. So it is a standard unit of length in nature, also known as "absolute length".
Hence the saying:
- pixel is the relative size,
- point is the absolute size.