What this Font Size Converter does
The Font Size Converter changes a type size between points (pt) and pixels (px). Enter a value, choose the direction, and the calculator returns the converted size to two decimal places. This is useful when moving between design software that describes type in points and web interfaces that commonly use CSS pixels.
The conversion uses the conventional screen relationship of 96 pixels per inch and 72 points per inch. That gives 1 pt = 96/72 px, or about 1.3333 px. In the other direction, 1 px = 72/96 pt, or 0.75 pt. The calculator applies those factors directly to your entered value.
For example, a 12 pt label converts to 16 px because 12 × 1.3333 is approximately 16. A 16 px label converts to 12 pt because 16 × 0.75 is 12. These are unit conversions, not a guarantee that text will look identical across every display, application, or typeface.
How to use the Font Size Converter
Enter the font size you already have, then select whether you are converting from points to pixels or pixels to points. The result appears as a single converted value. Make sure the direction matches the unit of the value you entered.
- Font size value: Type the numeric size. The tool accepts values from 0.1 to 1,000, including decimal values.
- Convert from: Choose points to pixels or pixels to points. The first option is points to pixels.
- Converted font size: Read the output in the destination unit. The number is rounded to two decimal places.
Suppose an editorial layout uses 18 pt for a heading, and a web style guide calls for the equivalent pixel size. Enter 18 and choose Points to pixels. The calculation is 18 × 1.3333, which is 24 px after rounding. If you instead start with a 24 px heading and want a point value, choose Pixels to points. The result is 18 pt.
How the Font Size Converter formula works
The formula multiplies the entered font size by a direction-specific conversion factor. For points to pixels, the factor is 96 ÷ 72, approximately 1.3333. For pixels to points, the factor is 72 ÷ 96, or 0.75. These factors express the same relationship in opposite directions.
Worked example: A caption is set to 10.5 pt. To convert it to pixels, calculate 10.5 pt × (96 px per inch ÷ 72 pt per inch) = 14 px. The units cancel correctly, leaving pixels. In reverse, 14 px × (72 pt per inch ÷ 96 px per inch) = 10.5 pt.
The calculator displays two decimal places to keep results readable. The internal conversion factor is approximate when written as 1.3333, so a displayed result may differ by a hundredth from a result calculated with the full 96/72 ratio. The underlying convention itself is a fixed ratio, rather than a measurement of the physical text on a particular screen.
Use cases for the Font Size Converter
Type sizes are often specified differently in print-oriented and screen-oriented workflows. A conversion can help designers carry a starting value between tools, compare a style specification, or communicate a size to a collaborator.
- Editorial design: Convert a print layout's point sizes to a pixel starting point for a digital mockup.
- Web production: Translate a CSS pixel value into points when documenting a design system for mixed media.
- Typography study: Check the numeric relationship between units while comparing hierarchy across headings, captions, and body text.
- Design handoff: Give a teammate a corresponding unit value when their software or brief uses another unit.
For example, a visual design student may be reviewing a poster that specifies 36 pt display text and preparing a screen preview. Converting 36 pt gives 48 px under the standard ratio. That value provides a consistent unit equivalent for the mockup, while the designer still evaluates the actual appearance in context.
Other factors to consider when calculating font size
Unit conversion describes a mathematical relationship. It does not account for how a typeface's letterforms appear, how much space a line occupies, or how comfortably a reader can scan a composition. Two fonts at the same nominal size can have different apparent heights because their x-height, proportions, and weight differ.
Display settings also affect perceived size. A browser zoom level, operating system scaling, device pixel ratio, and viewing distance can all change how text appears to a person. CSS pixels are logical units in browser layout, and a CSS pixel does not necessarily correspond to one physical display pixel on every device.
Use the converted value as a starting reference. Check the type in its intended layout, then review line length, line height, contrast, and hierarchy. For web work, test the design at common viewport widths and confirm that text remains legible when users adjust zoom. For print, use the intended output size and proof the page when precision matters.
Keep the source unit with the number in notes or handoff documentation. A value of 16 without “px” or “pt” can be ambiguous, particularly when a design moves between software. Recording both the original and converted values makes the assumption visible and helps others reproduce the same result.
Font Size Converter FAQ
How many pixels are in one point?
Using the standard 96 pixels per inch and 72 points per inch relationship, one point equals 96/72 pixels, or about 1.3333 px. The result is a unit conversion convention used for digital sizing.
How many points are in one pixel?
One pixel corresponds to 72/96 of a point, which is 0.75 pt under the same convention. Multiply a pixel value by 0.75 to convert it to points.
Will converted text look exactly the same?
No. The converted values are mathematically equivalent under the stated ratio, but rendering, typeface design, display scaling, zoom, and layout can change the visual result. Inspect the type in its real context.
Why does the result show decimal places?
Many font sizes do not convert to whole numbers. Showing two decimal places preserves useful precision while keeping the result easy to read. Some design tools may round or display values differently.
Can I use this for print and web design?
You can use it to translate between point and pixel units as a reference in either workflow. For final decisions, verify the output in the destination application and account for its sizing conventions and intended display or print conditions.