Frequently Asked Questions
How many rem is 24px?↓
At the default base font size of 16px, 24px equals 1.5rem (24 ÷ 16). If your root font size is different, divide the pixel value by that number — for example at an 18px base, 24px is about 1.333rem.
How many rem is 32 pixels?↓
32px equals 2rem at the standard 16px base font size (32 ÷ 16 = 2). Common conversions at a 16px base: 12px = 0.75rem, 14px = 0.875rem, 16px = 1rem, 20px = 1.25rem, and 32px = 2rem.
How do I convert px to rem?↓
Divide the pixel value by the root font size. With the browser default of 16px, 16px equals 1rem, 24px equals 1.5rem, and 32px equals 2rem. This converter does the math automatically and lets you change the base font size if your project uses a different root size.
What is the difference between rem and em?↓
rem is always relative to the root (html) font size, while em is relative to the font size of the current element's parent. rem gives predictable, consistent sizing across a page, whereas em compounds when elements are nested.
How are px and pt related in CSS?↓
In CSS, 1 inch is defined as 96px and 1 inch is 72pt, so 1pt equals 96/72 = 1.3333px and 1px equals 0.75pt. These are reference units and do not depend on the physical resolution of the screen.
How do vw and vh units work?↓
1vw equals 1% of the viewport width and 1vh equals 1% of the viewport height. So on a 1920px-wide viewport, 10vw equals 192px. Because the pixel result depends on the viewport, this converter lets you set the viewport width and height used for the calculation.
Is this CSS unit converter free and private?↓
Yes. The CSS Unit Converter is completely free with no signup required, and it runs 100% locally in your browser. No values you enter are ever uploaded to or stored on any server.
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