Font Size Converter & Chart

This tool uses 72 points per inch, 96 CSS pixels per inch and 25.4 millimetres per inch. For example, 12 pt converts to 16 CSS px and approximately 0.1667 in. The displayed values are rounded.

The point here is the CSS/PostScript point. Do not apply the result unchanged to another measurement system merely because it also uses the abbreviation pt.

The nominal font size describes the scale used for the font’s em, not the exact visible height of a capital, lowercase letter or accent. Each design has its own proportions and metrics.

Compare Inter with Lora at the same nominal value to inspect different letter shapes. A ruler placed against one printed capital measures that glyph, not the complete definition of its font size.

CSS px is a reference unit and is not necessarily a single hardware pixel. Browser zoom, device scaling and rendering affect the physical result on a screen.

A printed chart also depends on the print scale. An “actual size” PDF or webpage is not guaranteed to retain its nominal measurements if the print dialog fits it to another page size. Use the correct document settings and measure a known reference when physical dimensions matter.

A numerical conversion does not decide readability. Compare the real language, contrast, spacing and output environment. CSS font size explains web units, while LaTeX size commands describe a different authoring workflow.

For academic formatting, follow the required APA or MLA instructions rather than substituting a converted number without context.

Using the converter’s stated CSS/PostScript relationship, 10 pt equals approximately 13.3333 CSS px, 0.1389 in and 3.5278 mm. These are nominal unit conversions, not a promise that every ten-point letter has the same visible height. Compare the actual family and delivered size before using the number as a readability decision. A narrow lowercase, tall capital or accent can occupy different portions of the same nominal size, and browser zoom or print scaling changes the physical result.