Html 字体大小 - 转换为实际点大小
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Font Size - Translating to actual point size
提问by Jim B
Quick question for everyone:
每个人的快速问题：
Does anybody know what the actual point size would be when setting the font-size to the following values:
有没有人知道将 font-size 设置为以下值时的实际点大小是多少：
- Large
- Larger
- Medium
- Small
- Smaller
- X-Large
- X-Small
- XX-Large
- XX-Small
- 大的
- 更大
- 中等的
- 小的
- 较小
- 超大
- X-小
- XX-大
- XX-小
采纳答案by bpeterson76
Font sizes to pixels are explained by this chart:
此图表解释了字体大小到像素：
回答by Jim B
It may vary by browser slightly but for the most part this should work:
它可能因浏览器而略有不同，但在大多数情况下，这应该有效：
Large is 18 px which is around 13.5 pt
大是 18 px，大约是 13.5 pt
Larger is 19 px which is around 14 pt
较大的是 19 px，大约 14 pt
Medium is 16 px which is around 12 pt
中号是 16 px，大约是 12 pt
Small is 13 px which is around 10 pt
小号是 13 px，大约是 10 pt
Smaller is 13 px which is around 10 pt
较小的是 13 px，大约 10 pt
X-large is 24 px which is around 18 pt
X-large 为 24 px，约为 18 pt
X-small is 10 px which is around 7.5 pt
X-small 为 10 px，约为 7.5 pt
XX-large is 32 px which is around 24 pt
XX-large 是 32 px，大约是 24 pt
XX-small is 9 px which is around 7 pt
XX-small 是 9 px，大约是 7 pt
This is based off of seeing the computed font-size style in pixels and converting from this chart. This linkmight also be helpful.
回答by Ignacio Vazquez-Abrams
回答by Bjoern
Two good weblinks might answer this:
两个好的网络链接可能会回答这个问题：
回答by Ray Whitfield
If you are able to use java script then you can, using a canvas element, measure the height of a given font size. The size will return a value in pixels for the height of the font you specify. This will only work if the user has calibrated their screen: most have not but the default values are generally close for most monitor setups.
如果您能够使用 java 脚本，那么您可以使用画布元素测量给定字体大小的高度。大小将为您指定的字体的高度返回一个以像素为单位的值。这只有在用户校准了他们的屏幕时才有效：大多数没有校准，但大多数显示器设置的默认值通常很接近。
var cvs = document.getElementById("myCanvas");
var ctx = cvs.getContext("2d");
ctx.font="30px Arial";
var txt="Hello World";
var size = ctx.measureText(txt).height;
